¶¡ÏãÔ°AV

Journal Publications
Note: Students/post-docs underlined 

Anderson, A.M., Allen, D.M. and Venditti, J.G.( 2023). Sensitivity of subsurface permeability in coastal deltas to their morphodynamic and geomorphic characteristics. Water Resources Research, 59(11): e2022WR034136.

Gullacher, A., Allen, D.M. and Goetz, J.D.( 2023). Early warning indicators of groundwater drought in mountainous regions. Water Resources Research, 59(8): e2022WR033399.

Allen, D.M. and Gleeson, T. (2023). Groundwater resource allocation in British Columbia: challenges and ways forward. Confluence: Journal of Watershed Science and Management, 6(1).https://confluence-jwsm.ca/index.php/jwsm/article/view/49

Hammond, Z. and Allen, D.M.(accepted June 2023). Evaluating the feasibility of using artificial neural networks to predict complex glacial deposits. Hydrogeology Journal.

Nygren, M., Barthel, R, and Allen, D.M. and Griese, M. (2022). Exploring groundwater drought responsiveness in lowland post-glacial environments. Hydrogeology Journal 30(7): 1937-1961.

Mitton, A.J., and Allen, D.M. (2022). Aquifer-stream exchanges and the importance of groundwater discharge for maintaining instream habitat and benthic macroinvertebrates. Special Issue Novel Approaches for Understanding Groundwater Dependent Ecosystems in a Changing Environment. Frontiers in Earth Science, 28. https://doi.org/10.3389/feart.2022.768836

Henry, C. , Allen, D.M. and Kirste, D. (2021). Characterizing recharge in southern Mali using a combination of modeling and stable isotopes. Special Issue on Groundwater Recharge in Drylands. Frontiers in Water, 4. https://doi.org/10.3389/frwa.2022.778957

Allen, D.M. and Nott, A.H. (2021). How Important are those fracture zones? Scale dependent characteristics revealed through field studies and an integrated hydrological model of a mountain headwater catchment. Frontiers in Water. Special Issue Uncertainty in Groundwater Modeling Across Scales.

Hund, S.V., Grossmann, I., Douw, G.S., Allen, D.M. and Johnson, M.S. (2021) Changing water resources under El Niño, climate change and growing water demands in seasonally-dry tropical watersheds. Water Resources Research 57, e2020WR028535.

Moore, R.D., MacKenzie, L.G., Winkler, R.D., Spittlehouse, D.L., Allen, D.M. (2021). Data sets for the Upper Penticton Creek Watershed Experiment: a paired-catchment study to support investigations of watershed response to forest dynamics and climatic variability in an inland snow-dominated region. Hydrological Processes 35(10): E14391. https://doi.org/10.1002/hyp.14391

Dierauer, J. R., Allen, D.M., and Whitfield, P.H. (2021). Climate change impacts on snow and streamflow drought regimes in four ecoregions of British Columbia. Canadian Water Resources Journal 46(4): 168-193. DOI: 10.1080/07011784.2021.1960894

Winkler, R. Allen D.M., Heise, B., Giles, T., Moore, R.D., Redding, T., Spittlehouse, D., and Wei, A. (2021). Approaching four decades of forest watershed research at Upper Penticton Creek, British Columbia: a synthesis. Hydrological Processes. Special Issue on Long-term Watershed Experiments.

Rosales-Ramirez, T.Y., Kirste, D., Allen, D.M., and Mendoza, C.A. (2021) Mapping the vulnerability of groundwater to wastewater spills for source water protection in a shale gas region. Sustainability. Special Issue on Advances in Source Water Protection and Sustainability, 13(7), 3987; https://doi.org/10.3390/su13073987

Hunter, S. Allen D.M., Kohfeld, K.E. (2020) Comparing approaches for reconstructing groundwater levels in the mountainous regions of interior British Columbia, Canada, using tree ring widths. Atmosphere, 11, 1374; doi:10.3390/atmos11121374

Brubacher J, Allen D.M., Dery S., Parkes M., Chhetri B., Mak S., Sobie, S., Takaro T.K. (2020) Associations between five food and waterborne diseases and ecosystem classification, aquifer type and agricultural land in a changing climate. Science of the Total Environment 728, 13880

Morgan, S., Allen, D.M., Kirste, D. and Salas, C. (2019) Investigating the hydraulic role of a large buried valley network on regional groundwater flow. Hydrogeology Journal 27(7): 2377–2397.

Dierauer, J.R., Whitfield, P.H. and Allen, D.M. (March 2019) Snow drought risk and susceptibility in the western United States and southwestern Canada. Water Resources Research 55(4): 3076-3091. doi: 10.1029/2018WR023229

Dierauer, J.R., Whitfield, P.H. and Allen, D.M. (online Oct 2018) Climate controls on runoff and low flows in mountain catchments of western North America. Water Resources Research 54(10): 7495-7510 doi:10.1029/2018WR023087

Hund, S.V., Allen, D.M., Morillas, L. and Johnson, M.S. (2018) Groundwater recharge indicator as tool for decision makers to increase socio-hydrological resilience to seasonal drought. Journal of Hydrology 563:1119-1134.

Hsieh, A.I., Allen, D.M. and MacEachern, J.A. (2017). Upscaling permeability for reservoir scale modeling in bioturbated, heterogeneous tight siliciclastic reservoir rock: Lower Cretaceous Viking Formation, Provost Field, Alberta, Canada. Marine and Petroleum Geology 88: 1032-1046.

Klassen, J. and Allen, D.M. (2017). Assessing the risk of saltwater intrusion in coastal bedrock aquifers. In Special Issue on on Investigation and Management of Coastal Aquifers. Journal of Hydrology 551: 730-745. http://www.sciencedirect.com/science/article/pii/S0022169417301233

Rathay, S.Y., Allen, D.M., and Kirste, D. (on line July 2017). Response of a fractured bedrock aquifer to recharge from heavy
rainfall events. Journal of Hydrology - Special Issue on Groundwater Recharge. https://doi.org/10.1016/j.jhydrol.2017.07.042

Holding, S.H., Allen, D.M., Notte, C. and Olewiler, N. (2017) Enhancing water security in a rapidly developing shale gas region. Journal of Hydrology - Regional Studies. Special Volume on the Water-Energy Nexus, 11: 266-277.doi:10.1016/j.ejrh.2015.09.005 (open access)

Dierauer, J.R., Whitfield, P.H. and Allen, D.M. (2017) Assessing the suitability of hydrometric data for trend analysis: The 'FlowScreen' package for R. Canadian Water Resources Journal 42(3): 269-275.

Notte, C. Allen, D.M., Gehman, J., Alessi, D.S, and Goss, G.G. (2017). Comparative analysis of hydraulic fracturing wastewater practices in unconventional shale developments: Regulatory regimes. Canadian Water Resources Journal 42(2): 122-137. http://www.tandfonline.com/doi/full/10.1080/07011784.2016.1218795

Alessi, D.S. Zolfaghari, A., Kletke, S., Gehman, J., Allen, D.M. and Goss, G. (2017) Comparative analysis of hydraulic fracturing wastewater practices in unconventional shale development: Water sourcing, treatment and disposal practices. Canadian Water Resources Journal 42(2): 105-121.10.1080/07011784.2016.1238782

Gehman, J., Thompson, D. Y., Alessi, D.S., Allen, D.M. and Goss, G. (2016). Comparative analysis of hydraulic fracturing wastewater practices in unconventional shale development: Newspaper coverage of stakeholder concerns and social license to operate. Sustainability Journal 8(9), 912 .doi:10.3390/su8090912. Open Access.

Mundy, E.M., Dascher-Cousineau, K. Gleeson, T., Rowe, C. and Allen, D.M. (2016) Complexity of hydrogeologic regime around an ancient low-angle thrust fault revealed by multi-disciplinary field study. Geofluids 6: 673-687 doi: 10.1111/gfl.12200

Holding, S.H., Allen, D.M., Foster, S., Hsieh, A., Larocque, I., Klassen, J. and Van Pelt, S.C. (2016) A global assessment of current and future vulnerability of groundwater on small islands. Nature Climate Change 6: 1100–1103.

Galway, L.P., Parkes, M.W., Allen, D.M. and Takaro, K. (2016) Building interdisciplinary research capacity: a key challenge for ecological approaches in public health. AIMS Public Health Journal 3(2): 389-406. doi: 10.3934/publichealth.2016.2.389

Meixner, T. Manning, A.H., Stonestrom, D.A. Allen, D.M., Ajami, H., Blasch, K.W., Brookfield, A.E., et al. (2016). Implications of projected climate change for groundwater recharge in the western United States. Journal of Hydrology 534:124–138. doi:10.1016/j.jhydrol.2015.12.027

Buttle, J.M., Allen, D.M., Caissie, D., Davison, Bl, Hayashi, M., Peters, D.L., Pomeroy, J.W., Simonovic, S., St-Hilaire, A., and Whitfield, P.H. (accepted). Flood processes in Canada: regional and special aspects. Special Issue on Floods in Canada. Canadian Water Resources Journal 41 (1-2): 7-30. DOI:10.1080/07011784.2015.1131629

Middleton, M.A., Whitfield, P.H. and Allen, D.M. (2015). Independent component analysis of local-scale temporal variability in sediment-water interface temperature. Water Resources Research 51 (12): 9679–9695. doi:10.1002/2015WR017302

Holding, S. and Allen, D.M. (2015). Wave overwash impact on small islands: generalised observations for multiple hydrogeological settings. Journal of Hydrology 528(3): 1324-1335.

Foster, S. and Allen, D.M. (2015). Groundwater – surface water interactions in a mountain-to-coast watershed: effects of climate change and human stressors. Advances in Meteorology, Special Issue on Hydrological Processes in Changing Climate, Land Use and Cover Change, Article ID 861805 (open access)

Middleton, M.A., Allen, D.M., and Whitfield, P.H. (2016). Comparing the groundwater contribution in two groundwater-fed streams, Lower Fraser Valley, British Columbia. Special Issue on Groundwater - Surface Water Interactions in Canada. Canadian Water Resources Journal 41(4): 554-571. doi: 10.1080/07011784.2015.1068136

Hsieh, A.I., Allen, D.M. and MacEachern, J.A. (2015). Statistical modelling of biogenically enhanced permeability in tight reservoir rock. Journal of Marine and Petroleum Geology 65: 114-125 (Author Accepted Manuscript)

Holding, S. and Allen, D.M. (2015). Risk to water security for small islands: An assessment framework and application. Regional Environmental Change . (and Supplementary Material doi:10.​1007/​s10113-015-0794-1) (open access)

Antonellini, M., Allen, D.M., Mollema, P.N., Capo, D., and Greggio, N. (2015) Groundwater freshening following coastal progradation and land reclamation of the Po Plain, Italy. Hydrogeology Journal 23(5): 1009–1026. doi: 10.1007/s10040-015-1263-0

Graham, G., Allen, D.M. and Finkbeiner, B. (2015). Climate controls on nitrate concentration variability in an unconfined aquifer in the Lower Fraser River Valley, British Columbia. Environmental Earth Sciences Journal 73 (6): 2895-2907. doi. 10.1007/s12665-014-3072-5

Holding, S. and Allen, D.M. (2015). From days to decades: Numerical modeling of freshwater lens response to climate change stressors on small islands. Hydrology and Earth System Science 19, 933-949. doi:10.5194/hess-19-933-2015 (open access)

Galway, L. P., D. M. Allen, M. W. Parkes,L. Li, and T. K. Takaro (2015). Hydroclimatic variables and acute gastro-intestinal illness in British Columbia, Canada: A time series analysis, Water Resources Research 51 (2): 885-895. doi:10.1002/2014WR015519

Mayer, J., Allen, D.M., Gibson, H. and Mackie, D. (2014). Application of statistical approaches to analyze geological, geotechnical and hydrogeological data at a fractured rock mine site. Hydrogeology Journal 22: 1707–1723. doi 10.1007/s10040-014-1140-2

Spry, C.M.,K.E. Kohfeld, D.M. Allen, D. Dunkley and K. Lertzman. (2014) Characterizing pineapple express storms in British Columbia's Lower Mainland using meteorological, streamflow and stable isotope data. Canadian Water Resources Journal 39(3): 302-323.

Voeckler, H.M., Allen, D.M. and Alila, Y. (2014). Modeling coupled surface water – groundwater processes in a small mountainous headwater catchment. Journal of Hydrology 517: 1089–1106.

Welch, L.A. and Allen, D.M. (2014) Hydraulic conductivity characteristics in mountains and implications for conceptualizing bedrock groundwater flow. Hydrogeology Journal 22(5): 1003-1026.

Simpson, M.W., Allen, D.M. and Journeay, M.M. (2014). Assessing risk to groundwater quality using an integrated risk framework. Environmental Earth Sciences Journal 71(11): 4939-4956. doi 10.1007/s12665-013-2886-x

D.M. Allen, K. Stahl, A. Werner, R.D. Moore, and P.H. Whitfield. (2014). Trends in groundwater levels in British Columbia. Canadian Water Resources Journal 39(1):15-31.

Allen, D.M., Bayer, P., Ferguson, G. and Blum, P. (2014). Preface: Hydrogeology of shallow thermal systems. Special Issue on the Hydrogeology of Shallow Thermal Systems, Hydrogeology Journal 22(1): 1-6. doi: 10.1007/s10040-013-1082-0

Afsin, M. Allen, D.M., Kirste, D., Durukan, G., Gurel, A. and Oruc, O. (2014). Mixing processes in hydrothermal spring systems and implications for interpreting geochemical data: a case study in Cappadocia Region of Turkey. In Special Issue on the Hydrogeology of Shallow Thermal Systems, Hydrogeology Journal 22(1): 7-23.

Bridger, D.W. and Allen, D.M. (2014). Influence of geologic layering on heat transport and storage in an aquifer thermal energy storage (ATES) system. Special Issue on the Hydrogeology of Shallow Thermal Systems. Hydrogeology Journal. 22(1): 233-250

Galway, L.P., Allen, D.M., Parkes, M.W. and Takaro, T.K. (On line 2013 ) Seasonal variation of acute gastro-intestinal illness by hydroclimatic regime and drinking water source: A retrospective population-based study. Journal of Water and Health. doi:10.2166/wh.2013.105

Taylor, R.G., Scanlon, B., Döll, P., Rodell, M., van Beek, R., Wada, Y., Longuevergne, L., Leblanc, M., Famiglietti, J.S., Edmunds, M., Konikow, L., Green, T.R., Chen, J., Taniguchi, M., Bierkens, M.F.P, Alan MacDonald, Fan, Y., Maxwell, R.M., Yechieli, Y., Gurdak, J.J., Allen, D.M., Shamsudduha, M., Hiscock, K., Yeh, P.J.-F., Holman, I., Treidel, H.  (2012). Groundwater and climate change. Nature Climate Change. doi:10.1038/nclimate1744

Cavalcanti de Albuquerque, R., Allen, D.M. and Kirste, D. (2013). A methodology for spatially representing the likelihood of occurrence of natural contaminants in groundwater. Environmental Earth Sciences Journal 68(7): 1863-1875. doi: 0.1007/s12665-012-1874-x

Norman, E., Dunn, G., Bakker, K., Allen, D.M., and Cavalcanti de Albuquerque, R. (2013).  Water security assessment: integrating governance and freshwater indicators. Water Resources Management Journal 27(2): 535-551.

Welch, L., Allen, D.M. and Tromp-van Meerveld, I. (2012). Topographic controls on deep groundwater contributions to mountain headwater streams and sensitivity to available recharge. Canadian Water Resources Journal. 37(4): 349-371. doi: 10.4296/cwrj2011-907

Gleeson, T., Allen, D.M. and Ferguson, G. (2012) Teaching hydrogeology: a review of current practice. Hydrology and Earth Systems Science Journal 16: 1-10. doi:10.5194/hess-16-1-2012

Welch, L.A. and Allen, D.M. (2012). Consistency of groundwater flow patterns in mountainous topography: implications for valley-bottom water replenishment and for defining hydrogeological boundaries. Water Resources Research 48: W05526 doi:10.1029/2011WR010901.

Voeckler, H. and Allen, D.M. (2012). Estimating regional scale fractured bedrock hydraulic conductivity using discrete fracture network (DFN) modeling. Hydrogeology Journal 20(6): 1081-1100. DOI: 10.1007/s10040-012-0858-y

Holman, I., Allen, D.M., Cuthbert, M.O. and Goderniaux, P. (2011) Towards best practice for assessing the impacts of climate change on groundwater. Hydrogeology Journal 20(1): 1-4. DOI 10.1007/s10040-011-0805-3. Editors' choice for 2012 - one of 5 articles selected (out of ~150) that will be made publically available on line.

Gleeson, T., Alley, W. M., Allen, D.M., Sophocleous, M.A., Zhou, Y., Taniguchi, M., VanderSteen, J.  (2011). Towards sustainable groundwater use: setting long-term goals, backcasting and managing adaptively. Ground Water 50(1): 19-26. doi: 10.1111/j.1745-6584.2011.00825.x

McArthur, S.A.Q., Allen, D.M., and Luzitano, R. (2011). Resolving aquifer heterogeneity using ground penetrating radar and borehole geophysical logging with implications for nitrate rransport modeling. Environmental Earth Sciences 63(3): 581-593. DOI 10.1007/s12665-010-0726-9.

Green, T. M. Taniguchi, H. Kooi, J. Gurdak, K. Hiscock, D. Allen, H. Treidel, A. Aureli. (2011) Beneath the surface of global change: impacts of climate change on groundwater. Journal of Hydrology, 405: 532-560. doi:10.1016/j.jhydrol.2011.05.002. Most dowloaded article on SciVerse ScienceDirect, in 90 day period up to Jaunuary 2012. Top 25 (8th) most downloaded article on SciVerse ScienceDirect in 2013.

Liggett, J.E. and Allen, D.M. (2011) Evaluating DRASTIC using different data sources, interpretations and mapping approaches in areas of limited geological variability. Environmental Geology 62:1577-1595. DOI : 10.1007/s12665-010-0642-z

Henry, C., Allen, D.M. and Huang, J. (2011) Groundwater storage variability and annual recharge using well hydrograph and GRACE satellite data. Hydrogeology Journal 19(4): 741-755

Chesnaux, R., Allen, D.M. and Simpson, M.W.M. (2011). Comparing isotopic groundwater ages measurements with simulated groundwater ages: Example of the Abbotsford-Aquifer (USA and Canada) and application. Water and Environment Journal, 25(1).  DOI: 10.1111/j.1747-6593.2011.00260.x

Allen, D.M., Cannon, A.J., Toews, M.W., and Scibek, J. (2010) Variability in simulated recharge using different GCMs. Water Resources Research, 46, W00F03,  doi:10.1029/2009WR008932.

Liggett, J.E. and Allen, D.M. (2010). Comparing approaches for modeling spatially-distributed direct recharge in a semi-arid region. Hydrogeology Journal 18: 339-357. DOI 10.1007/s10040-009-0512-5

Marquez-Lago, T.T., Allen, D.M. and Thewalt, J. (2010). A novel approach to modelling water transport and drug diffusion through the stratum corneum. Theoretical Biology and Medical Modelling 2010, 7:33.

Pruneda, E., Barber, M., Wu, J. and Allen, D.M. (2010). Use of stream response functions to determine impacts of replacing surface-water use with groundwater withdrawals. Hydrogeology Journal, 18(5): 1077-1092. DOI 10.1007/s10040-010-0591-3.

Allen, D.M., Werner, A. and Whitfield, P.H. (2010) Groundwater level responses in mountainous terrain: regime classification, and linkages to climate and streamflow. Hydrological Processes, 24(23):  3392-3412   DOI:10.1002/hyp.7757

Gleeson, T., VanderSteen, J., Sophocleous, M.A., Taniguchi, M., Alley, W.M., Allen, D.M., Zhou, Y. and Bruner, P. (2010). Groundwater sustainability strategies. Nature Geoscience, 3(6): 378-379.

Smerdon, B.S., Allen, D.M. and Neilsen, D. (2010). Evaluating the use of a gridded climate surface for modelling groundwater recharge in a semi-arid region. Hydrological Processes 24(21): 3087-3100.  DOI: 10.1002/hyp.7724.

Aleck Ostry, Malcolm Ogborn, Kate L. Bassil, Tim Takaro, Diana M. Allen (2010). Climate change and health in British Columbia: projected impacts and a proposed agenda for adaptation research. International Journal of Environmental Research and Public Health, 7: 1018-1035. doi:10.3390/ijerph7031018.

Bridger, D.W. and Allen, D.M. (2010). Heat transport simulations in a heterogeneous aquifer used for aquifer thermal energy storage (ATES). Canadian Geotechnical Journal, 47:96-115.

Chesnaux. R., Allen, D.M. and Jenni, S. (2009). Regional fracture network permeability using outcrop scale measurements. Engineering Geology,108, Issues 3-4: 259-271.

Toews, M.W. and Allen, D.M. (2009). Simulated response of groundwater to predicted recharge in a semi-arid region using a scenario of modelled climate change. Environmental Research Letters 4, 035003. doi.org/10.1088/1748-9326/4/3/035003

Toews. M.W. and Allen, D.M. (2009). Evaluating different GCMs for predicting spatial recharge in an irrigated arid region. Journal of Hydrology, 374: 265-281. doi:10.1016/j.jhydrol.2009.06.022

Toews, M.W., Allen, D.M. and Whitfield, P.H. (2009) Recharge sensitivity to local and regional precipitation in the southern Okanagan Basin, British Columbia. Water Resources Research, 45, W06404.

Smerdon, B.D., Allen, D.M., Grasby, S.E., and Berg, M.A.. (2009). An approach for predicting groundwater recharge in mountainous watersheds. Journal of Hydrology, 365: 156–172.

Shirazi, T. Allen, D.M., Quinton, W.L., Pomeroy, J.W., and Shook, K.R. (On Line 2009). Estimating soil thaw energy in sub-alpine tundra at the hillslope scale, Wolf Creek, Yukon Territory, Canada. Hydrology Research, 40(1): 1-18. doi: 10.2166/nh.2009.043

Schuurman, N., Deshpande, A., and Allen, D.M. (2008). Data integration across borders: a case study of the Abbotsford-Sumas Aquifer (British Columbia/ Washington State). Journal of American Water Resources Association, (JAWRA) 44(4): 921-934. DOI: 10.1111/j.1752-1688.2008.00192.x.

Chesnaux, R. and Allen, D.M. (2008). Groundwater travel times for unconfined island aquifers bounded by freshwater or seawater. Hydrogeology Journal, 16: 437-445. doi:10.1007/s10040-007-0241-6

Allen, D.M., Schuurman, N. Deshpande, A. and Scibek, J (2008) Data integration and standardization in cross-border hydrogeological studies: Hydrostratigraphic Model Development. Environmental Geology, 53:1441–1453. doi:10.1007/s00254-007-0753-3

Chesnaux, R. and Allen, D.M. (2008). Simulating nitrate leaching profiles in a highly permeable vadose zone. Environmental Modeling and Assessment, 13(4): 527-539. doi:10.1007/s10666-007-9116-4.

M. Surrette, D.M. Allen and M. Journeay (2008). Regional evaluation of hydraulic properties in variably fractured rock using a hydrostructural domain approach.  Hydrogeology Journal, 16(1): 11-30. doi:10.1007/s10040-007-0206-9

Surrette, M. and Allen, D.M. (2008). Quantifying heterogeneity in fractured sedimenatary rock using a hydrostructural domain approach. Geological Society of America Bulletin, 120(1): 225–237.

Rayner, S.F., Bentley, L.R., and Allen, D.M. (2007). Constraining aquifer architecture with electrical resistivity imaging in a fractured hydrogeological setting. Journal of Environmental and Engineering Geophysics, 12:323-335.

Berg, M.A. and Allen, D.M. (2007). Low flow variability in groundwater-fed streams. Canadian Water Resources Journal, 32(3): 227-245.

Chesnaux, R., Allen, D.M. and Graham, G. (2007). Assessment of the impact of soil amendment practices on nitrate contamination in the Abbotsford-Sumas Aquifer. Environmental Science and Technology, 41(21): 7229-7234. doi: 10.1021/es0704131.

Denny, S., Allen, D.M., and Journeay, M. (2007). DRASTIC-Fm: A modified vulnerability mapping method for structurally-controlled aquifers. Hydrogeology Journal, 15: 483-493. Doi: 10.1007/s10040-006-0102-8

Allen, D.M., Schuurman, N. and Zhang, Q. (2007) Using fuzzy logic for modeling aquifer architecture. Journal of Geographical Systems, 9: 289-310. Doi: 10.1007/s10109-007-0046-0.

Toews, M.W., Whitfield, P.H. and Allen, D.M. (2007). Seasonal statistics: the ‘seas’ package for R. Computers and Geosciences, 33:944-951. doi:10.1016/j.cageo.2006.11.011

Scibek, J., Allen, D.M., Cannon, A. and Whitfield, P. (2007). Groundwater-surface water interaction under scenarios of climate change using a high-resolution transient groundwater model. Journal of Hydrology, 333: 165-181, doi:10.1016/j.jhydrol.2006.08.005

Bridger, D.W. and Allen, D.M. (2006). An investigation into the effects of diffusion on salinity distribution beneath the Fraser River Delta. Hydrogeology Journal, 333: 165-181, doi 10.1007/s10040-006-0060-1

Scibek, J. and Allen, D.M. (2006) Modeled Impacts of Predicted Climate Change on Recharge and Groundwater Levels. Water Resources Research, 42, W11405, doi:10.1029/2005WR004742.

Scibek, J. and Allen, D.M. (2006). Comparing the responses of two high permeability, unconfined aquifers to predicted climate change. Global and Planetary Change, 50, p. 50-62.

Allen, D.M., Grasby, S.E. and Voormeij, D.A. (2006). Determining the circulation depth of thermal springs in the Rocky Mountain Trench, southeastern British Columbia, Canada using geothermometry and borehole temperature logs. Hydrogeology Journal, 14:159-172.

Bridger, D.W. and Allen, D.M. (2005). Considerations for the optimal design of aquifer thermal energy storage (ATES) systems. ASHRAE Journal, September, S32-S38.

Allen, D.M. (2004) Determining the origin of groundwater using stable isotopes of 18O, 2H and 34S. Ground Water, 42, 1, p. 17-31.

Allen, D.M. and Lepitre, M.E. (2004). Use of Pb, 18O, and 2H isotopes in mining related environmental studies. Mine Water and the Environment, 23:119-132.

Allen, D.M., Mackie, D.C. and Wei, M. (2004) Groundwater and climate change: a sensitivity analysis for the Grand Forks aquifer, southern British Columbia. Hydrogeology Journal, 12 (3): 270-290.

Allen, D.M. and Voormeij, D.A. (2002) Oxygen-18 and deuterium fingerprinting of tailings seepage at the Sullivan Mine, B.C. Mine Water and the Environment, 21: 168-182.

Lepitre, M.E., Allen, D.M., Mortensen, J.K. and Gabites, J.E. (2003). Differentiating sources of dissolved lead in mine waters using stable isotopes, Sullivan Mine, British Columbia. Water Resources Research, 39(1), 1008-1020.

Allen, D.M., Abbey, D.G., Mackie, D.C., Luzitano, R., and Cleary, M. (2002 ). Investigation of Potential Saltwater Intrusion Pathways in a Fractured Aquifer using an Integrated Geophysical, Geological and Geochemical Approach. Journal of Environmental and Engineering Geophysics, 7(1), p. 19-36.

Michel, F.A., Allen, D.M. and Grant, M.B. (2001). Hydrogeochemistry and Geothermal Characteristics of the White Lake Basin, British Columbia, Canada. Geothermics, Fall Issue, 2001.

Allen, D.M. and Suchy, M.S (2001) Geochemical Evolution of Groundwater on Saturna Island, British Columbia. Canadian Journal of Earth Sciences, 38, 1059-1080.

Ghomshei, M.M. and Allen, D.M. (2000). Potential Application of Oxygen-18 and Deuterium in Mining Effluent and Acid Rock Drainage (ARD) Studies. Environmental Geology, 39(7), p. 767-773.

Ghomshei, M.M. and Allen, D.M. (2000) Hydrochemical and Stable Isotope Assessment of Tailings Pond Leakage, Nickel Plate Mine, British Columbia. Environmental Geology, 39(8), p. 937-944.

Allen, D.M. and Michel, F.A. (1999) Characterizing a Faulted Aquifer by Field Testing and Numerical Simulation. Ground Water, 37(5), p. 718-728.

Allen, D.M. and Michel, F.A. (1998). Evaluation of multi-well test data in a faulted aquifer using linear and radial flow models. Ground Water, 36(6), p. 938-948.

Allen, D.M. (1996). Discussion of "Detailed Pumping Test to Characterize a Fractured Aquifer" by Gernand and Heidtman, 1996 in Ground Water, vol. 35, no. 4. In Ground Water, vol. 36, no. 2

Allen, D.M. and Michel, F. A. 1996. The successful use of microgravity profiling to delineate faults in buried bedrock valleys. Ground Water, 34 (6), p. 1132-1143.

Allen, D., Michel, F. and Judge, A. 1988. The permafrost regime in the Mackenzie Delta-Beaufort Sea Region, N.W.T. and its significance to the reconstruction of the paleoclimatic history. Journal of Quaternary Science, INQUA Volume, June 1988.

Expert Panel Reports

BC Hydraulic Fracturing Scientific Review Panel (Allen, D.M., Eberhardt, E., and Bustin, A.) (2019). Scientific Review of Hydraulic Fracturing in British Columbia. Final Report to BC Minister of Energy, Mines and Petroleum Resources, February 2019, 236 pp.

Other Refereed Contributions

Taylor, R.G., Aureli, A., Allen, D. , Banks, D., Villholth, K., and Stigter, T. (2022) Chapter 7 - Groundwater, aquifers and climate change. World Water Development Report (WWDR) 2022. Groundwater: Making the Invisible Visible. UNESCO.

Allen, D.M., Holding, S. and McKoen, Z. (2018) Hazard-Specific Vulnerability Mapping for Water Security in a Shale Gas Context. In: Endo, A. and Oh, T. (Eds) Water-Energy-Food Nexus : Human-Environmental Security in the Asia-Pacific Ring of Fire, pp. 33-43.. Springer.

Dierauer, J., Allen, D.M. and Whitfield, P.H. (2018). Exploring future water demand and climate change impacts on water availability in the Peace Region of British Columbia, Canada. In: Endo, A. and Oh, T. (Eds) Water-Energy-Food Nexus : Human-Environmental Security in the Asia-Pacific Ring of Fire, pp. 45-54. Springer.

Galway, L. P., Parkes, M. W., Corbett, K. K. and Allen, D.M. (2016) Climate change frames in public health and water resource management: Towards intersectoral climate change adaptation. In Information, Communication, Education and Training on Climate Change, W. Leal, R. Dunk, and S. Illingworth (Eds), pp. 35-48. Proceedings of the World Symposium on Climate Change Adaptation (WSCCA-2015), September 2-4, 2015, Manchester, U.K. DOI 10.1007/978-3-319-39880-8_3

Kohut, A., Rivera, A., Wei, M., Allen, D.M. and Nowlan, L. (2013). Chapter 16: Groundwater Management and Governance in Canada. In: A. Rivera (Ed.) Canada's Groundwater Resources. Fitzhenry and Whiteside Ltd. Publishers, 804 pp.

Wei, M., Allen, D.M., Grasby, S., Kohut, A., Ronneseth, K., (2013). Chapter 9: Cordilleran Hydrogeological Region. In: A. Rivera (Ed.) Canada's Groundwater Resources. Fitzhenry and Whiteside Ltd. Publishers, 804 pp.

Allen, D.M., Hayashi, M., Nastev, M.  and Chen, Z. (2013). Chapter 4: Climate and  Recharge. In: Rivera (Ed.), Canada's Groundwater Resources. Fitzhenry and Whiteside Ltd. Publishers, 804 pp.

Allen, D.M., Wendling, G.,  van der Kamp, G., Nastev, M., Rivera, A. and Martel, A. 2013). Chapter 6: Sustainability and Vulnerability of Groundwater. In: Rivera (Ed.), Canada's Groundwater Resources. Fitzhenry and Whiteside Ltd. Publishers, 804 pp.

Michel, F. and Allen, D.M. (2013). Chapter 7: Groundwater as an Energy Source.In: A. Rivera (Ed.) Canada's Groundwater Resources. Fitzhenry and Whiteside Ltd. Publishers, 804 pp.

Henry, C.M., Demon, H., Allen, D.M. and Kirste, D. (2011). Groundwater recharge and storage variability in southern Mali. Chapter 3 In: Holger Treidel, Jose Luis Martin-Bordes, Jason J. Gurdak (Eds). Climate Change Effects on Groundwater Resources: A Global Synthesis of Findings and Recommendations. IAH International Contributions to Hydrogeology, CRC Press, 414 pages.

Allen, D.M. (2011). Climate change impacts in valley-bottom aquifers in mountain regions: Case studies from British Columbia, Canada. Chapter 14 In: Holger Treidel, Jose Luis Martin-Bordes, Jason J. Gurdak (Eds). Climate Change Effects on Groundwater Resources: A Global Synthesis of Findings and Recommendations. IAH International Contributions to Hydrogeology, CRC Press, 414 pp.

Bowleg, J. and Allen, D.M. (2011). Effects of storm surges on groundwater resources, North Andros Island, Bahamas. Chapter 5 In: Holger Treidel, Jose Luis Martin-Bordes, Jason J. Gurdak (Eds). Climate Change Effects on Groundwater Resources: A Global Synthesis of Findings and Recommendations. IAH International Contributions to Hydrogeology, CRC Press, 414 pp.

Neilson-Welch, L.A., Allen, D.M. and Roed, M.A. (2011). Chapter 7: Groundwater. In: M.A. Roed and R. J. Fulton, Okanagan Geology South: Geologic Highlights of the South Okanagan, British Columbia.  Sandhill Book Marketing Ltd., Kelowna, BC. ISBN: 978-0-9699795-3-1, 238 pp.

Appaih-Adjei, E.K. and Allen, D.M. (2009). Quantifying the impact of predicted climate change on groundwater recharge to fractured rock aquifers. Groundwater and Climate in Africa, Proceedings of the Kampala Conference, Africa, Kampala, Uganda, June 24-28, 2008, IAHS Publication 334,ISBN 978-1-907161-05-6

Allen, D.M. and Liteanu, E. (2008). Long-term Dynamics of the Saltwater-Freshwater Interface on the Gulf Islands, British Columbia, Canada. In. G. Barrocu (Ed.) Proceedings of the First International Joint Saltwater Intrusion Conference, SWIM-SWICA, Cagliari, Italy, September 25-29, 2006. ISBN10-: 88-902441-2-7.

Walker, I.J. and Sydneysmith, R. (2008) British Columbia; in From Impacts to Adaptation: Canada in a Changing Climate 2007, edited by D.S. Lenmen, F.J. Warren, J. Lacroix and E. Bush, Government of Canada, Ottawa, Ontario, p. 329-386. Section contribution on Water Resources by Cohen, S., Whitfield, P.H., Allen, D.M.

Scibek, J., Allen, D.M. and Whitfield, P.H. (2008). Quantifying the impacts of climate change on groundwater in an unconfined aquifer that is strongly influenced by surface water. In: Dragoni, W. & Sukhija, B.S. (eds) Climate Change and Groundwater. Geological Society, London, Special Publications, 288:79–98. DOI: 10.1144/SP288.07.

Wei, M. and Allen, D.M. (2004) Groundwater Management in British Columbia: Challenges in a Regulatory Vacuum. In: M. Brentwood and Stephen F. Robar(Eds.) Managing Common Pool Groundwater Resources: An International Perspective, Praeger Publishers,  westport, CT, p. 7-29.

Rivera, A. Allen, D.M., and Maathuis, H.  (2004). Climate Change and Variability: Groundwater Resources (Chapter 10), In: Threats to Freshwater Availability in Canada, Environment Canada, p. 77-83.
Allen, D.M. and Bridger, D.W. (2003). ATES Systems in Heterogeneous Aquifers: A Modelling Case Study. In Proceedings of the 9th International Conference on Thermal Energy Storage, Futurestock, Warsaw, Poland, September 1-4, 2003.

Allen, D.M., Liteanu, E. and Mackie, D.C. (2003). Geological controls on the occurrence of saltwater intrusion in heterogeneous and fractured island aquifers in southwestern British Columbia, Canada. Second International Conference on Saltwater Intrusion and Coastal Aquifers, Merida, Mexico, March 31-April 3, 2003.

Allen, D.M., Matsuo, G., Suchy, M. and Abbey, D.G. 2001. A multidisciplinary approach to studying the nature and occurrence of saline groundwater in the Gulf Islands, British Columbia, Canada. In Proceedings of the First International Conference on Saltwater Intrusion and Coastal Aquifers - Monitoring, Modeling and Management, Essaouira, Morocco, April 23-25, 2001.

Allen, D.M., Woo, C., Shymko, G.F. and Maynard, S.(2000). Operating strategies for ATES in areas with non-ideal climates. Paper in Proceedings of the 8th International Conference on Thermal Energy Storage, Terrastock. Stuttgart, Germany, August 27- Sept 3, 2000.

Michel, F.A. and Allen, D.M. (2000). ATES well field study and the choice of aquifer in a sedimentary environment: A case study. Paper in Proceedings of the 8th International Conference on Thermal Energy Storage, Terrastock. Stuttgart, Germany, August 27- Sept 3, 2000.

Allen, D. M. and Michel, F. A. 1997. Hydrologic and Thermal Simulations of an ATES System in Fractured Limestone, Carleton University, Canada. Paper in Proceedings of Megastock '97, 7th International Conference on Thermal Energy Storage, Sapporo, Japan, June 1997.

Michel, F.A. and Allen, D.M. 1997. Optimizing Well Configurations for Aquifer Thermal Energy Storage Systems. Paper in Proceedings of Megastock '97, 7th International Conference on Thermal Energy Storage, Sapporo, Japan, June 1997.

Conference Proceedings

Anderson, A. and Allen, D.M. (2021) Geostatistical characterization of aquifer heterogeneity in large coastal deltas: implications for geophysical data collection. Proceedings of Society of Exploration Geophysicists and American Association of Petroleum Geologists Conference, Denver CO, September 26-October 1, 2021.

Mitton, A. and Allen, D.M. (2021) The effect of climate variability on aquifer-stream exchanges. Proceedings of GeoNiagara 2021, the 74th Canadian Geotechnical Conference and 14th Joint CGS/IAH-CNC Groundwater Conference. Niagara Falls, September 26-29, 2021.

Gullacher, A. and Allen, D.M. (2021) Regional climate influences on groundwater drought. Proceedings of GeoNiagara 2021, the 74th Canadian Geotechnical Conference and 14th Joint CGS/IAH-CNC Groundwater Conference. Niagara Falls, September 26-29, 2021.

Nott, A. and Allen, D.M. (2021) Modelling stream sensitivity to pumping in the Bertrand Creek Watershed, British Columbia and Washington State. Proceedings of GeoNiagara 2021, the 74th Canadian Geotechnical Conference and 14th Joint CGS/IAH-CNC Groundwater Conference. Niagara Falls, September 26-29, 2021.

Rathay, S., Burgess, R., and Allen, D.M. (2017). Estimating recharge to mountainous bedrock aquifers in a temperate region – a multi-method approach.GeoOttawa 2017, 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference, Ottawa, October 1-4, 2017.

Morgan, S.E., Allen, D.M., Kirste, D. and Salas, C.J. (2017) Using Petrel to integrate geological and geophysical datasets for investigating the three-dimensional hydrostratigraphic architecture of a buried valley network. GeoOttawa 2017, 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference, Ottawa, October 1-4, 2017.

Simons, M.S., Allen, D.M., Kirste, D. and Welch, L.A. (2017ation) Numerical modelling of highly saline wastewater disposal in Northeast British Columbia. GeoOttawa 2017, 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference, Ottawa, October 1-4, 2017.

Dandurand, R., D.M. Allen, B.C. Ward, S. McDougall, and M. Geertsma (2017) Investigating regional groundwater flow influences on slope stability in unlithified materials.. GeoOttawa 2017, 70th Canadian Geotechnical Conference and the 12th Joint CGS/IAH-CNC Groundwater Conference, Ottawa, October 1-4, 2017.

Vivas, J., Hunt, C., Stead, D., Allen, D.M. and Elmo, D. (2015). Characterising groundwater in rock slopes using a combined remote sensing - numerical modelling approach. In Proceedings of the International Society of Rock Mechanics 13th International Congress, Montreal, QC, April 29-May 6, 2015.

Vivas, J., Stead, D. Allen, D.M., Elmo, D. and D’Ambra, S. (2014). Characterisation of groundwater in rock slopes using a DFN engineering approach. In Proceedings of the First International Conference on Discrete Fractured Network Engineering Conference, DFNE 2014, Vancouver, BC, October 19-22, 2014.

Holding, S.T. and Allen, D.M. 2014. Responses to climate change and development stressors on small oceanic islands. In Proceedings of 23rd Salt Water Intrusion Meeting, Husum, Germany, June (extended abstract)

Allen, D.M. and Liteanu, E. (2011). Modeling the Effect of Post-Glacial Sea Level Change on the Position of the Saltwater-Freshwater Interface beneath Saturna Island, BC. In Proceedings GeoHydro 2011.Water and Earth: The Junction of Quaternary Geoscience and Hydrogeology. Joint Conference of the Canadian Quaternary Association (CANQUA) and the Canadian Chapter of the International Association of Hydrogeologists (IAH-CNC). Quebec City, Quebec, Aug 28-31, 2011.

Simpson, M.W., Allen, D.M., Journeay, M.M. and Korteling, B. (Oral presentation) Assessing Risk to Groundwater Quality Using an Integrated Risk Framework. In Proceedings GeoHydro 2011.Water and Earth: The Junction of Quaternary Geoscience and Hydrogeology. Joint Conference of the Canadian Quaternary Association (CANQUA) and the Canadian Chapter of the International Association of Hydrogeologists (IAH-CNC). Quebec City, Quebec, Aug 28-31, 2011.

Galway, L., Salomon, A., Takaro, T. and Allen, D.M. (2011). Resilience in environmental and public health: Is it time for a social-ecological systems approach? In Proceedings of ICARUS II: Climate Vulnerability and Adaptation: Marginal Peoples and Environments. Initiative on Climate Adaptation Research and Understanding through the Social Sciences, Ann Arbor, Michigan, May 5-8, 2011.

Neilson-Welch, L.A. and Allen, D.M. (2010) (Stolte Student Award) Partitioning of Regional Groundwater Flow to Streamflow and Mountain Front Recharge (MFR) in Mountainous Terrain. Canadian Water Resources Association Annual Conference, Vancouver, BC, June 14-19, 2010.

Fisher, G.C., Levson, V.M. and Allen, D.M. (2009) Hydrogeological investigation of stacked Quaternary and Late Cretaceous bedrock aquifers, Vancouver Island, British Columbia, Canada. In Proceedings: GeoHalifax, Canadian Geotechnical Society-International Association of Hydrogeologists-CNC Joint Annual Conference, Halifax, NS, Sept. 20-23, 2009.

Middleton, M.A. and Allen, D.M. (2009) Variability of Streamflow Temperature in two Groundwater-Fed Streams, Abbotsford-Sumas Aquifer, British Columbia. In Proceedings: GeoHalifax, Canadian Geotechnical Society-International Association of Hydrogeologists-CNC Joint Annual Conference, Halifax, NS, Sept. 20-23, 2009.

R. Winkler, D. Spittlehouse, D. Allen, T. Redding, T. Giles, G. Hope, B. Heise, Y. Alila. (2008). The Upper Penticton Creek Watershed Experiment: Integrated water resource research on the Okanagan plateau. In Proceedings of Canadian Water Resources Association and Okanagan Basin Water Board, One Watershed-One Water Conference, Kelowna, BC, October 21-23, 2008.

B.D. Smerdon, J.E. Liggett, and D.M. Allen (2008). Assessing one side of the water budget: How can groundwater recharge be predicted across the Okanagan Basin? In Proceedings of Canadian Water Resources Association and Okanagan Basin Water Board, One Watershed-One Water Conference, Kelowna, BC, October 21-23, 2008.

Voeckler, H. and Allen, D.M. (2008) Scale Implications for Estimating Fractured Bedrock Permeability. In Proceedings GeoEdmonton'08, Canadian Geotechnical Society-International Association of Hydrogeologists Joint Annual Conference, Edmonton, Alberta, Sept 21-24, 2008. Toth Award for Best Student Paper.

Liggett, J.E., Toews, M.W., Smerdon, B.D., Allen, D.M. (2008). Predicting Groundwater Recharge in the Okanagan Basin: A Comparison of Three Models. In Proceedings GeoEdmonton'08, Canadian Geotechnical Society-International Association of Hydrogeologists Joint Annual Conference, Edmonton, Alberta, Sept 21-24, 2008.

Henry, C. and D.M. Allen (2008) Quantifying Changes in Groundwater Storage Using Water Table Fluctuation and GRACE Satellite Data, Mali, Africa. In Proceedings GeoEdmonton'08, Canadian Geotechnical Society-International Association of Hydrogeologists Joint Annual Conference, Edmonton, Alberta, Sept 21-24, 2008.

Carmichael, V., Allen, D.M., Kenny, S., Gellein, C. (2008) Hydraulic properties of aquifers in the Okanagan Valley, BC. In Proceedings GeoEdmonton'08, Canadian Geotechnical Society-International Association of Hydrogeologists Joint Annual Conference, Edmonton, Alberta, Sept 21-24, 2008.

Allen, D.M., Stahl, K., Werner, A., Moore, R.D. and Whitfield, P.H. (2008). Groundwater and Low Flows: Seasonality and Trends in British Columbia. In Proceedings GeoEdmonton'08, Canadian Geotechnical Society-International Association of Hydrogeologists Joint Annual Conference, Edmonton, Alberta, Sept 21-24, 2008.

Smerdon, B.D., Allen, D.M., Grasby, S., and Berg, M.A. (2008). Linkages between upland water sources and valley bottom aquifers in a mountainous watershed. In Proceedings GeoEdmonton'08, Canadian Geotechnical Society-International Association of Hydrogeologists Joint Annual Conference, Edmonton, Alberta, Sept 21-24, 2008.

Wei, M., Ronneseth, K, Allen, D., Kohut, A.P., Turner, B., and Grasby, S.  (2007) Types and general characteristics of aquifers in the Canadian Cordillera Hydrogeologic Region. In: Proceedings 8th Annual Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, OttawaGeo2007: The Diamond Jubilee Conference, Ottawa, October 21-24, 2007.

Allen, D.M. (2006). Integrating Land Use, Groundwater, and Surface Water. In Proceedings of Source Protection: Governance, Science and Health: An Exploratory Workshop, University of British Columbia, Vancouver.

Chesnaux, R., McArthur, S.Q., Allen, D.M. and Scibek, J. (2006). Investigating the scale of heterogeneity and implications for nitrate transport, Abbotsford-Sumas Aquifer, BC and Washington State. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, Sea-to-Sky, October 1-4, 2006.

Wei, M., Allen, D.M., Smart, H., and Brown, B. (2006). Development of new regulations to protect the ground water resource in British Columbia, Canada. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, Sea-to-Sky, October 1-4, 2006.

Bridger, D.W. and Allen, D.M. (2006). An investigation into the nature and origin of the distribution of pore water salinity beneath the Fraser River Delta. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, Sea-to-Sky, October 1-4, 2006.

Surrette, M. Appaih-Adjei, E.K and Allen, D.M. (2006). Quantifying Recharge to Fractured Aquifers using a Discrete Fracture Network Approach. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, Sea-to-Sky, October 1-4, 2006.

Liggett, J. Allen, D.M., Journeay, M., Denny, S., Tolwar, S. and Ivey, L (2006). Intrinsic aquifer vulnerability maps in support of sustainable community planning, Okanagan Valley, BC. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, Sea-to-Sky, October 1-4, 2006.

Toews, M., Whitfield, P. and Allen, D.M. (2006). Sensitivity of spatially modelled recharge to climate change in the Okanagan Valley, BC. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Conference, Sea-to-Sky, October 1-4, 2006.

Allen, D.M. and Scibek, J. Use of downscaled GCM Data for Modeling Groundwater Recharge, Basin Runoff, and Groundwater Levels. In Proceedings of XVI International Conference on Computational Methods in Water Resources (CMWR XVI), Global Climate Change and Hydrologic Processes Session, Copenhagen, Denmark, 19-22 June 2006

Scibek, J. and Allen, D.M. (2005). Modeled Climate Change Impacts in the Abbotsford-Sumas Aquifer, Central Fraser Lowland of BC, Canada and Washington State, US. In Proceedings of Puget Sound- Georgia Basin Conference, March 29-31, 2005, Seattle, WA.

Wei, M., Allen, D.M., Scibek, J., Bishop, T. Ronneseth, K., Carmichael, V., and Hardy, R. (2004). Characterizing the Aquifer at Grand Forks, Southern British Columbia to Support Local Community Planning and Protection Initiatives. Canadian Geotechnical Society/International Association of Hydrogeologists (IAH-CNC/CGS) Joint Conference, Quebec City, Quebec, October 24-27, 2004.

Journeay, M.M., Denny, S., Allen, D.M., Wei, M. and Turner, B. (2004). Exploring sustainable Groundwater Resource Management Strategies in the Gulf Islands, BC. Canadian Geotechnical Society/International Association of Hydrogeologists (IAH-CNC/CGS) Joint Conference, Quebec City, Quebec, October 24-27, 2004.

Scibek, J., Allen, D.M., Wei, M. and Whitfield, P. (2003). Modelling the impact of climate change on groundwater in Grand Forks, BC: consideration of aquifer heterogeneity (extended abstract). In Proceedings of the Canadian Geotechnical Society - International Association of Hydrogeologists Joint Annual Conference, Winnipeg, Manitoba, September 29-October 1, 2003.

Journeay, M.M, Allen, D.M., de Kemp, E., Denny, S. and Turner, R. (2003). 3-D geologic architecture and vulnerability mapping in structurally-controlled aquifers, Gulf Islands, BC (extended abstract). In Proceedings of the Canadian Geotechnical Society - International Association of Hydrogeologists Joint Annual Conference, Winnipeg, Manitoba, September 29-October 1, 2003.

Allen, D.M. and Bridger, D.W. (2003). Dealing with load imbalances and aquifer heterogeneity: Design and monitoring of the ATES system in Agassiz, BC. In Proceedings of the Canadian Geotechnical Society - International Association of Hydrogeologists Joint Annual Conference, Winnipeg, Manitoba, September 29-October 1, 2003.

Michel, F.A. and Allen, D.M. Identification and management of potential problems in aquifer thermal energy storage systems. In Proceedings of Canadian Geotechnical Society - International Association of Hydrogeologists Joint Annual Conference, Winnipeg, Manitoba, September 29-October 4, 2003.

Allen, D.M. and Bridger, D.W. (2003). ATES Systems in Heterogeneous Aquifers: A Modelling Case Study. In Proceedings of the 9th International Conference on Thermal Energy Storage, Futurestock, Warsaw, Poland, September 1-4, 2003.

Allen, D.M., Liteanu, E. and Mackie, D.C. (2003). Geological controls on the occurrence of saltwater intrusion in heterogeneous and fractured island aquifers in southwestern British Columbia, Canada (2003) Second International Conference on Saltwater Intrusion and Coastal Aquifers, Merida, Mexico, March 31-April 3, 2003.

Allen, D.M., Scibek, J., Mackie, D.C. and Wei, M. (2002). Modelling the impact of climate change on a groundwater system: A case study for south central BC. Proceedings of the CGS-IAH Conference, Niagra Falls, Ontario, Oct. 20-23, 2002.

Paddington, S., Stead, D. and Allen, D.M. (2002). The influence of groundwater on the  stability of forest slopes in British Columbia. Proceedings of the CGS-IAH Conference, Niagra Falls, Ontario, Oct. 20-23, 2002.

Mackie, D.C., Allen, D.M., Mustard, P.S. and Journeay, M. 2002. Structural controls on groundwater resource distribution in the southern Gulf Islands, British Columbia: A field-based analysis of brittle fault and fracture systems in the Upper Cretaceous Nanaimo Group with implications for resource management. In: Proceedings of the Fractured Rock Aquifer Conference, National Ground Water Association, Denver, CO, March 115, 2002.

Mackie, D., Allen, D.M. and Mustard, P.S. (2001) Conceptual model for the structurally complex, bedrock-controlled groundwater flow system on the southern Gulf Islands, British Columbia. In: Proceedings of the 2nd Joint CGS-IAH Groundwater Specialty Conference, Calgary, Alberta, Sept. 16-19, 2001.

Lepitre, M.E., Allen, D.M., Mortensen, J.K. and Ghomshei, M.M. (2001). Use of stable Pb, 18O and D isotopes for investigating acid rock drainage (ARD) at the Sullivan Mine, British Columbia. In: Proceedings of the 2nd Joint CGS-IAH Groundwater Specialty Conference, Calgary, Alberta, Sept. 16-19, 2001.

Jordan-Knox, Q.S., Allen, D.M. and Clague, J.J. 2001. Preliminary models of groundwater-surface water interactions within Cheakmus River Valley, B.C. In Proceedings of the Canadian Water Resources Association BC Branch Conference, Whistler, British Columbia, May 9-11, 2001.

Allen, D.M., Matsuo, G., Suchy, M. and Abbey, D.G. 2001. A multidisciplinary approach to studying the nature and occurrence of saline groundwater in the Gulf Islands, British Columbia, Canada. In Proceedings of the First International Conference on Saltwater Intrusion and Coastal Aquifers - Monitoring, Modeling and Management, Essaouira, Morocco, April 23-25, 2001.

Abbey, D.G. and Allen, D.M. (2000) Fracture zones, aquifer testing, and scale effects: Considerations in fractured bedrock aquifers of southwestern British Columbia. Paper in Proceedings of the 53rd Canadian Geotechnical Conference, Montreal, October 15th-18th, 2000.

Allen, D.M., Woo, C., Shymko, G.F. and Maynard, S. (2000). Operating strategies for ATES in areas with non-ideal climates. Paper in Proceedings of the 8th International Conference on Thermal Energy Storage, Terrastock. Stuttgart, Germany, August 27- Sept 3, 2000.

Michel, F.A. and Allen, D.M. (2000). ATES well field study and the choice of aquifer in a sedimentary environment: A case study. Paper in Proceedings of the 8th International Conference on Thermal Energy Storage, Terrastock. Stuttgart, Germany, August 27- Sept 3, 2000.

Allen, D.M., Ghomshei, M.M., Sadler-Brown, T.L., Holtz, D. and Dakin, A. (2000). The current status of geothermal exploration and development in Canada. Paper in Proceedings of teh World Geothermal Congress 2000, Kyushu-Tohoku, Japan, May 28-June 10, 2000.

Allen, D.M. Tiu, L. and Wei, M. 1999. Evidence of linear flow in bedrock aquifers in British Columbia. Paper in Proceedings of the Canadian Water Resources Association - British Columbia Conference, Confronting Uncertainty: Managing Change in Water Resources and the Environment, October 27-29, 1999, Vancouver, B.C.

Allen, D.M. Modelling protocol for successful simulations of flow and heat transport in ATES systems. Paper in Proceedings of the Stockton Geothermal Conference II, Stockton, N.J., March 16 & 17, 1997.

Allen, D.M. and Michel, F.A. 1997. Hydrologic and Thermal Simulations of an ATES System in Fractured Limestone, Carleton University, Canada. Paper in Proceedings of Megastock '97, 7th International Conference on Thermal Energy Storage, Sapporo, Japan, June 1997.

Michel, F.A. and Allen, D.M. 1997. Optimizing Well Configurations for Aquifer Thermal Energy Storage Systems. Paper in Proceedings of Megastock '97, 7th International Conference on Thermal Energy Storage, Sapporo, Japan, June 1997.

Allen D., Michel, F. and Judge, A. 1988. Paleoclimate and permafrost in the Mackenzie Delta. Paper in Proceedings of the Fifth International Conference on Permafrost, Trondheim, Norway.

Maps

Holding, S. and Allen, D.M. (2015). Shallow Groundwater Intrinsic Vulnerability Map (DRASTIC Map) and Supporting Component Maps for Northeast British Columbia. Data compiled from BC GIS data warehouse; projected in NAD 83 BC Environment Albers. Related technical report: "Shallow Groundwater Intrinsic Vulnerability Mapping in Northeast British Columbia; Final Report, November 2015" submitted to BC Ministry of Forests, Lands and Natural Resource Operations and Pacific Institute for Climate Solutions.

Klassen, J. and Allen, D.M. (2015) Map of Risk of Saltwater Intrusion in Coastal Bedrock Aquifers: Gulf Islands, BC and supporting component maps. Projected in NAD 83 BC Environment Albers and available on iMapBC. Related technical report: "Risk of Saltwater Intrusion in Coastal Bedrock Aquifers: Gulf Islands, BC" submitted to BC Ministry of Forests, Lands and Natural Resource Operations and Pacific Institute for Climate Solutions.

Erlandson, G., Allen, D.M., Gilchrist, A., Newton, P., Barroso, S., Lapcevic, P. and Allen, S. (2014) Updated Intrinsic Susceptibility Maps for the Gulf Islands. 2007 maps updated with new provincial scale. Metadata at https://apps.gov.bc.ca/pub/geometadata/metadataDetail.do?recordUID=60019&recordSet=ISO19115

Liggett, J., and Allen, D.M. (2010) Aquifer Intrinsic Vulnerability Maps - Vernon, BC. Metadata at https://apps.gov.bc.ca/pub/geometadata/metadataDetail.do?recordUID=60019&recordSet=ISO19115

Liggett, J., and Allen, D.M. (2010) Aquifer Intrinsic Vulnerability Maps - Oliver, BC. Metadata at https://apps.gov.bc.ca/pub/geometadata/metadataDetail.do?recordUID=60019&recordSet=ISO19115

Denny, S.C., Journeay, M.J., Allen D.M., Turner, R.J.W, and Wei, M. (2006) Intrinsic Groundwater Susceptibility, Gulf Islands (92B and 92G), British Columbia; Geological Survey of Canada, Open File 5333, scale 1:100 000.

Allen, D.M., Bishop, T., and Scibek, J. (2004). Hydrogeological Maps for Grand Forks, BC. Includes DRASTIC vulnerability, well capture zones, aquifer architecture. BC Ministry of Water, Land and Air Protection.

Published Research Reports

Nott, A. and Allen, D.M. (2023). Integrated Hydrological Model for Windermere Creek Watershed: Groundwater Dynamics and Connectivity with Surface Water. Water Science Series, WSS2023-02. Prov. B.C., Victoria, 51 pp.

Gullacher, A., D.M. Allen and Goetz, J. (2023) Indicators of Groundwater Drought in British Columbia. Water Science Series, WSS2023-01. Prov. B.C., Victoria.

Johnson, B. , D.M. Allenand Wei, M. (2022) Quantifying Mapping the Likelihood of Flowing Artesian Conditions in the Okanagan Basin and Fraser Valley, British Columbia. Water Science Series, WSS2022-03. Province of British Columbia, Victoria.

Gullacher, A.,D.M. Allen and Goetz, J. (2020) Classification of Groundwater Response Mechanisms in Provincial Observation Wells Across British Columbia. Water Science Series, WSS2021-03, Prov. B.C., Victoria, 58 pp.

Nott, A.H. and D.M. Allen (2020) Quantifying Aquifer-Stream Exchanges Along Bertrand Creek, British Columbia and Washington State, Using a Numerical Groundwater Flow Model. Water Science Series WSS2020-06, Province of British Columbia, Victoria, 86 pp.

Allen, D.M. Johnson, B., Garnet, A., Howe, K., Lepitre, M., Simpson, M. (2020). Assessment of Aquifer-Stream Connectivity Related to Groundwater Abstraction in the Lower Fraser Valley: Phase 2 Field Investigation at Otter Park, Langley. Water Science Series 2020-03, Province of British Columbia, Victoria, 77 pp.

Forstner, T., Gleeson, T., Borrett, L., Allen, D.M., Wei, M. and Baye, A. (2018). Mapping aquifer stress, groundwater recharge, groundwater use, and the contribution of groundwater to environmental flows for unconfined aquifers across British Columbia. BC Water Science Series Report WSS-2018-04, 105 pp.

Morgan, S.E. and Allen, D.M. (2018) Geoscience BC Peace Project: Final Report. Geoscience BC Report 2018-13, 69 pp.

Simons, M.S., Allen, D.M., Kirste, D. and Welch, L.A. (2018). Modelling the disposal of highly saline wastewater in the Paddy and Cadotte members, northeastern British Columbia (NTS 093P); in Geoscience BC Summary of Activities 2017: Energy, Geoscience BC, Report 2018-4, p. 87–96.

Hall, G., Allen, D.M., Simpson, M., Tolera, H., Jackson, B., Middleton, M.A., and Lepitre, L. (2017) Assessment of Aquifer-Stream Connectivity Related to Groundwater Abstraction in the Lower Fraser Valley: Phase 1 Field Investigation. Water Science Series, WSS2017-02. Prov. B.C., Victoria B.C.

Middleton, M.A., Allen, D.M. 2017. Assessment of hydraulic connectivity related to groundwater extraction on selected sensitive steams: Stream Vulnerability Mapping. Water Science Series, WSS2017-04. Prov. B.C., Victoria B.C.

Goss, G., Alessi, D. Allen, D.M., Gehman, J., Brisbois, J. Kletke, S., Zolfaghari Sharak, A., Notte, C. et al. (2015). Unconventional Wastewater Management: A Comparative Review and Analysis of Hydraulic Fracturing Wastewater Management Practices Across Four North American Basins. Final report to the Canadian Water Network, April 23, 2015. http://www.cwn-rce.ca/reports/report/unconventional-wastewater-management-a-comparative-review-and-analysis-of-hydraulic-fracturing-wastewater-management-practices-across-four-north-american-basins

Norman, E., Bakker, K., Cook, C. Dunn, G. and Allen, D. (2010). Water Security: A Primer. Programme on Water Governance, University of British Columbia, 47pp. ISBN 978-0-88865-698-8

Wei, M., Allen, D.M., Carmichael, V. and Ronneseth, K. (2010). State of Understanding of the Hydrogeology of the Grand Forks Aquifer. BC Ministry of Environment, Victoria, BC. Available through BC ECOCAT. (ISBN 978-0-7726-6215-6 (External review by Water Stewarship staff, Ministry of Health, 2 consultants, and local water suppliers)

Ostry, A., Ogborn, M., Takaro, T., Bassil, K and Allen, D. (2008). Climate Change and Health in British Columbia. White paper prepared for BC Government by invitation of the Pacific Institute for Climate Solutions (PICS), November 2008.

Allen D.M., Scibek, J., Whitfield, P. and Wei, M. (2004) Climate Change and Groundwater: Summary Report. Final report prepared for Natural Resources Canada, Climate Change Action Fund, March 2004, 404pp.http://www.adaptation.rncan.gc.ca/projdb/index_e.php?class=118Grand Forks

Allen, D.M. (2001). Groundwater and Climate: A Case Study for the Grand Forks Aquifer, Southern British Columbia. Final Report prepared for the Groundwater Section, Water Management Branch, B.C. Ministry of Environment, Lands and Parks, Victoria, B.C., Queen's Press, March 2001, 227 pp.

Allen, D.M. (2000). Numerical Modelling of the Grand Forks Aquifer, Southern British Columbia. Final report prepared for the Groundwater Section, Water Resources Branch, British Columbia Ministry of Environment, Lands and Parks, Victoria, B.C., Queen's Press, March 2000, 126 pp. ISBN 0-7726-4374-1

Allen, D.M. (1999). An assessment of the methodologies used for analyzing hydraulic test data in British Columbia. Final Report prepared for Groundwater Section, Water Management Branch, British Columbia Ministry of Environment, Lands and Parks, Victoria, B.C., Queen's Press, March 1999, 84pp. ISBN 0-7726-3914-0

Unpublished Research Reports

Rosales-Ramirez, T., Allen, D.M. and Kirste, D (2020). Mapping Areas Most Vulnerable to Groundwater Quality Deterioration through Wastewater Spills/Leaks in Northeast British Columbia. Technical Report Prepared for BC Oil and Gas Commission, 20 pp plus map..

Holding, S., Mc Koen, Z. and Allen, D.M. (2018). Groundwater and Surface Water Quality and Quantity Vulnerability Mapping in Northeast British Columbia. Technical Report submitted to BC Oil and Gas Commission, ,June 2018, 17 pp.

Simons, M.S., Allen, D.M., Kirste, D. and Welch, L.A. (2018): Modelling the Disposal of Highly Saline Wastewater in the Paddy and Cadotte Members, Northeastern British Columbia (NTS 093P); in Geoscience BC Summary of Activities 2017: Energy, Geoscience BC, Report 2018-4, p. 87–96.

Bystron, I., Kirste, D. and Allen, D.M. (2017). GIS-Based Approach to Spring Occurrence and Spring Source Areas in Northeast British Columbia. Report to British Columbia Oil and Gas Research and Innovation Society (BC OGRIS). ¶¡ÏãÔ°AV, 60 pp.

Middleton, M.A.. and Allen, D.M. (2016) Vulnerability Assessment for Groundwater Dependent Streams. Final report submitted to BC Ministry of Environment. ¶¡ÏãÔ°AV, 73 pp.

Klassen, J. and Allen, D.M. (2015) Risk of Saltwater Intrusion in Coastal Bedrock Aquifers: Gulf Islands, BC. Final report prepared for BC Ministry of Forests, Lands and Natural Resource Operations, and BC Ministry of Environment, 40 pp.

Holding, S. and Allen, D.M. (2015). Final Report: Shallow Groundwater Intrinsic Vulnerability Mapping in Northeast British Columbia. Final report to BC Ministry of Forests, Lands and Natural Resource Operations, and Pacific Institute for Climate Solutions, November 2015, 30 pp plus Appendix.

Allen, D.M., Kirste, D., Klassen, J., Larcoque, I.,Foster, S., Henderson, G. (2015). Research Monitoring Well on Salt Spring Island. Final report prepared for BC Ministry of Forests, Lands and Natural Resource Operations, and BC Ministry of Environment, 24 pp.

Foster, S.B and Allen, D.M. (2015). Results of Coupled Groundwater-Surface Water Model of the Cowichan Valley Watershed. Final Report by ¶¡ÏãÔ°AV to BC Ministry of Forests, Lands and Natural Resource Operations, Cowichan Valley Regional District, and Cowichan Watershed Board, 95 pp.

Notte, C. and Allen, D.M. (2015). Regulatory and policy regimes, and voids within and across jurisdictions. Chapter 3 in Goss, G., Alessi, D., Allen, D., Gehman, J. Brisbois, J. Kletke, S., Zolfaghari Sharak, A., Notte, et al. Unconventional Wastewater Management: A Comparative Review and Analysis of Hydraulic Fracturing Wastewater Management Practises across four North American Jurisdictions, p. 49-92.

Larocque, I., Allen, D.M., Kirste, D. (2015). The hydrogeology of Salt Spring Island: A summary of research conducted by ¶¡ÏãÔ°AV as part of a project “Risk Assessment Framework for Coastal Bedrock Aquifers”. Department of Earth Sciences, ¶¡ÏãÔ°AV, Burnaby, BC, 62 pp.

Allen, D.M., Holding, S., Foster, S., Hsieh, A., Larocque, I., Klassen, J., and Van Pelt (2014). Assessment of SIDS Groundwater Systems: Transboundary Water Assessment Programme. Final Reprot submitted to UNESCO-IHP, 44 pp plus data.

Klassen, J., Allen, D.M. and Kirste, D. (2014). Chemical Indicators of Saltwater Intrusion for the Gulf Islands, British Columbia. Final report submitted to BC Ministry of Forests, Lands and Natural Resource Operations and BC Ministry of Environment, 43 pp.

Holding, S. and Allen, D.M. (2013). Freshwater Resource Risk Assessment for Andros Island. Final Programmatic Report – Revised Grant FY13-G-BH-RBC-BNT-¶¡ÏãÔ°AV. Final report prepared for The Nature Conservancy - Northern Caribbean Office, November 2013. Department of Earth Sciences, ¶¡ÏãÔ°AV, 33 pp.

Programme on Water Governance (2012) (with Allen, D.M., Simpson, M.W., Cavalcanti de Albuquerque, R.). Water Security Guidance Document. http://www.watergovernance.ca/projects/water-security/water-security-manual-2/

Cavalcanti de Albuquerque, R., Allen, D.M. and Kirste, D. (2012). Mapping the likelihood of occurrence of a groundwater contaminant, Part 2, Section 5. In: The Water Security Guidance Document. Program on Water Governance, UBC. http://www.watergovernance.ca/projects/water-security/water-security-manual-2/

Simpson, M.W., Allen, D.M. and Journeay, M.M. (2012). Water Security Risk Assessment, Part 2, Section 2. In: The Water Security Guidance Document. Program on Water Governance, UBC. http://www.watergovernance.ca/projects/water-security/water-security-manual-2/

Dunn, G., Cook, C., Bakker, K, and Allen, D.M. (2012). Defining and Assessing Water Security, Part 1, Section 1 In: Water Security Guidance Document. Program on Water Governance, UBC. http://www.watergovernance.ca/projects/water-security/water-security-manual-2/

Dunn, G., Norman, E., Bakker, K., Allen, D.M. and Cavalcanti de Albuquerque, R. (2012). Mapping Water security status indicators, Part 2, Section 4. In: The Water Security Guidance Document. Program on Water Governance, UBC. http://www.watergovernance.ca/projects/water-security/water-security-manual-2/

Norman, E., Cook, C., Dunn, G., Bakker, K. and Allen, D.M. (2012). Working toward water security: fostering good governance practices through adaptive management, Part 3, Section 6. In: The Water Security Guidance Document. Program on Water Governance, UBC. http://www.watergovernance.ca/projects/water-security/water-security-manual-2/

Allen, D.M. and Kirste, D. (2012). Results of the July 2011 Groundwater Chemistry Sampling Study on Mayne Island, British Columbia. Report prepared for the Mayne Island Integrated Water Systems Society. Simon Fraser University, Burnaby, BC, 39 pp.

Smerdon, B.S. and Allen, D.M. (2009). Regional-Scale Groundwater Flow Model of the Kelowna Area and the Mission Creek Watershed, Central Okanagan, BC. Final report submitted to Water Stewardship Division, BC Ministry of Environment, 46 pp.

Carmichael, V., Kenny, S.L., Allen, D.M. and Gellein, C. (2008). Re-evaluating the aquifer hydraulic properties within the North Okanagan, British Columbia, Canada. Water Stewardship Division, BC Ministry of Environment.

Chesnaux, R. and Allen, D.M. (2008). Using PETREL and ECLIPSE to Model Fractured-Rock Type Aquifers. Unpublished Final Report submitted to Schlumberger Water Services.

Allen, D.M., Chesnaux, R. and McArthur, S. (2007). Nitrate Transport Modeling within the Abbotsford-Sumas Aquifer, British Columbia, Canada and Washington State, USA. Unpublished Final Report to Environment Canada, 166 pp.

Barber, M., Wu, J., Pruneda, E., McKenzie, C. and Allen, D.M. (2008) Groundwater Investigations of Bertrand and Tenmile Watersheds,  DRAFT Final Report, prepared for Whatcom CountyWorks Department, Bellingham, WA, 83.pp.

Neilson-Welch, L. and Allen, D. (2007).  Groundwater and Hydrogeological Conditions in the Okanagan Basin, British Columbia: A State-of-the-Basin. Prepared for Okanagan Basin Water Board for Objective 1 of the Phase 2 Groundwater Supply and Demand Project, December 2007.

Moore, R.D., Allen, D.M. and Stahl, K. (2007). Climate Change and Low Flows: Influences of Groundwater and Glaciers. Final Report for Climate Change Action Fund Project A875, 211 pp.

Toews, M.W. and Allen, D.M. (2008). Aquifer Characterization, Recharge Modeling and Groundwater Flow Modeling for Well Capture Zone Analysis in the Oliver Area of the Southern Okanagan, BC. Final Report to BC Ministry of Environment.

Chesnaux, R. and Allen, D.M. (2007). Updated Particle Tracking Results for Nitrate Hot Spot Study, Abbotsford-Sumas Aquifer, BC, Canada: Case for Large-Capacity Production Wells Only Activated in the Model. Final report to Fraser Health Authority and Environment Canada, February, 2007, 17pp.

Chesnaux, R. and Allen, D.M. (2006). Particle Tracking Results for Nitrate Hot Spot Study, Abbotsford-Sumas Aquifer, BC, Canada. Final report to Fraser Health Authority and Environment Canada, December 2006, 30 pp.

Chesnaux, R. and Allen, D.M. (2006). Preliminary Results for Nitrate Leaching Simulations in the Abbotsford-Sumas Aquifer, BC, Canada. Unpublished report prepared for BC Ministry of Environment and Environment Canada. 25p.

Scibek, J. and Allen, D.M. (2006). Groundwater Sensitivity to Climate Change: Modelling Recharge to Abbotsford-Sumas Aquifer, Southwest British Columbia. Report prepared for BC Ministry Water, Land and Air Protection, and Environment Canada, 145p.

Scibek, J. and Allen, D.M. (2005). Numerical Groundwater Flow Model of the Abbotsford-Sumas Aquifer, Central Fraser Lowland of BC, Canada, and Washington State, US. Unpublished report prepared for Environment Canada, Vancouver, BC, 203pp.