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318 - Glacial retreat effects and transport in the Milk River Transboundary Aquifer Alfonso Rivera 1 , André Guy Tranquille Temgoua 1 & Marie-Amélie Pétré 1, 2 1 Geological Survey of Canada, Québec City, Québec, Canada 2 INRS-ETE, Québec City, Québec, Canada René Lefebvre INRS-ETE, Québec, Canada Many hypotheses have been formulated regarding the study of the Milk River Transboundary Aquifer (MRTA) straddling the international Canada-USA border (Province of Alberta – State of Montana). These include groundwater flow across aquifers and aquitards, groundwater ages, GW/SW interactions, recharge zones, transboundary fluxes, discharge mechanisms, erosional rebound, sub-hydrostatic pressures, vertical macroscopic dispersion across layers, and others. This presentation tries to clarify two of the adopted assumptions in what is a more complete and unified three-dimensional ongoing study of the MRTA (Pétré et al., 2015a, 2015b). Based on one-dimensional solutions of the hydraulic diffusivity and dispersion equations, we analyze scenarios on the effect of pore pressure dissipation from the weight of glaciers and the potential dispersive flow between the aquifer (MRTA) layer and aquitards located above and below the aquifer. Scoping calculations to evaluate pressure release as a function of time, after the last glaciation in the Milk River region, are performed using the hydrostatic rebound formulation of Terzaghi in 1D. Conceptually, the presence of glaciers can induce fluid pressure changes in the rock matrix attributed to geomechanical factors due to glacial retreat. Furthermore, stress-induced pressure changes may cause modifications in Darcy fluxes during the loading and unloading of glaciers generating a long-term transient flow occurring in the low permeable layers above and below the MRTA. By observing the enrichment in δD, δ 18 O, and Cl - concentration down-gradient in the Milk River aquifer, some researchers have proposed that dispersion would be the controlling process because the spatial distribution of several chemical parameters is controlled by aquifer transmissivity. They call it megascopic (or macroscopic) dispersion. They argue that this is caused by large formational heterogeneities: The Milk River aquifer receives inflow of more saline, isotopically heavier water from the shale unit immediately below the aquifer (Colorado formation). In order for this 1D vertical transport to take place, two conditions must be met: a) a hydraulic vertical gradient between the MR aquifer and the aquitard must exist; and b) a concentration gradient between the aquitard and the MR aquifer must exist so that concentration is higher in the aquitards and lower in the aquifer. In this partial study, we consider a simple 1-D vertical case where C(z,t) is to be determined. We analyzed two cases: 1) vertical transport between the Milk River aquifer and the Colorado aquitard; and 2) vertical transport between the Milk River aquifer and the Pakowki aquitard. IAH-CNC 2015 WATERLOO CONFERENCE 75
219 - Current results and outcomes of the regional groundwater knowledge acquisition program in Québec Alain Rouleau 1 , Thomas Buffin-Bélanger 2 , Stéphane Campeau 3 , Gwénaëlle Chaillou 2 , Romain Chesnaux 1 , Vincent Cloutier 4 , Marie Larocque 5 , René Lefebvre 6 , John Molson 7 & Éric Rosa 4 1 Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada 2 Université du Québec à Rimouski (UQAR), Rimouski, Québec, Canada 3 Université du Québec à Trois-Rivières (UQTR), Trois-Rivières, Québec, Canada 4 Université du Québec en Abitibi-Témiscamingue (UQAT), Amos, Québec, Canada 5 Université du Québec à Montréal (UQAM), Montréal, Québec, Canada 6 Institut national de la recherche scientifique, centre Eau, Terre et Environnement (INRS-ETE), Québec City, Québec, Canada 7 Université Laval, Québec City, Québec, Canada We present a summary of the current results and outcomes of the Groundwater Knowledge Acquisition Program (Programme d’acquisition des connaissances sur les eaux souterraines – PACES) in Quebec, initiated in 2008 by the Quebec Ministry of the Environment (Ministère du Développement durable, de l’Environnement et de la Lutte contre les changements climatiques – MDDELCC), in order to provide a sound basis for groundwater protection and management over the entire municipal territory of the Province. PACES projects are carried out by universities in collaboration with regional authorities and stakeholders, such as Regional Conferences of Elected Officials (Conférences régionale des élus – CRÉ), Regional County Municipalities (Municipalités régionales de comté – MRC), and Regional Watershed Organizations (Organismes de bassin versant - OBV). PACES projects involve an exhaustive inventory of preexisting data and the acquisition of complementary field and laboratory data. Deliverable products include a large number of maps (1:100 000), reports and important databases. Thirteen regional PACES projects have been completed between 2009 and 2015, with a total funding of 13 M$ from MDDELCC and over 3.5 M$ from a number of regional partners, including 9 CRÉs and 34 MRCs. These projects cover a total area of approximately 87 000 km 2 , with a population of over 3 M people. Numerous highly qualified persons have been trained as part of the PACES projects, conducting research, including laboratory and field activities, related to data acquisition and to specific regional groundwater problems. Thematic research projects were also carried out as part of a targeted research partnership program on groundwater from the Fonds de recherche du Québec (FRQ). After six years the PACES program has covered approximately 70% of the municipal territory of Quebec with sound data on groundwater and aquifer systems. Important outcomes include a significant increase in knowledge and data availability on groundwater, strengthening of inter-university research activities through the Réseau québecois sur les eaux souterraines (RQES), development of partnerships with many stakeholders on groundwater, and impetus for further research projects. A number of related challenges have surfaced during the PACES projects, particularly on the efficient transfer and the proper use of hydrogeological data in land use planning, for a better protection and sustainable management of groundwater. 76 IAH-CNC 2015 WATERLOO CONFERENCE
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Conference Program Abstracts HOSTED
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IAH-CNC 2015 WATERLOO ORGANIZING CO
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GREETINGS FROM THE IAH CNC It is my
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PLATINUM SPONSORS MAXXAM - is the C
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GOLD SPONSOR GHD - is a leading int
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EXHIBITORS AQUANTY INC. - a hydrolo
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HOTEL FLOOR PLANS 12 IAH-CNC 2015 W
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SOCIAL PROGRAM In addition to the c
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HENRY DARCY DISTINGUISHED LECTURE S
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Since the first big surprise on fin
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In this final plenary session, some
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Wednesday PM2 Technical Sessions: 1
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Page 35 and 36: ABSTRACTS Groundwater/Surface Water
Page 37 and 38: Western Canada Sedimentary Basin (A
Page 39 and 40: Road Salt Impacts on Groundwater We
Page 41 and 42: estimates of road salt loading to t
Page 43 and 44: Innovation in the Remediation of Co
Page 45 and 46: 214 - Treatment of Manufactured Gas
Page 47 and 48: Geological and geochemical conditio
Page 49 and 50: 227 - Deep-Seated Aquiclude Groundw
Page 51 and 52: samples from the Upper Silurian, th
Page 53 and 54: 247 - Subsurface Water Flow from We
Page 55 and 56: advanced, event-based sampling. Exa
Page 57 and 58: natural or anthropogenic hazards an
Page 59 and 60: numeric model that covered 80% of t
Page 61 and 62: and remediation performance in smea
Page 63 and 64: experiments designed to mimic a per
Page 65 and 66: e-entrant bedrock valleys on the Ni
Page 67 and 68: and above the regional Newmarket Ti
Page 69 and 70: Agricultural Impacts on Groundwater
Page 71 and 72: conditions is necessary to ensure r
Page 73 and 74: Faced with increasing nitrate conce
Page 75: This paper outlines the District’
Page 79 and 80: cross-sections to look for consiste
Page 81 and 82: Surface conditions have changed tho
Page 83 and 84: The goal of this research was to ob
Page 85 and 86: 277 - Assessing soil water content
Page 87 and 88: An integrated model was determined
Page 89 and 90: 198 - Monitoring of event-based, de
Page 91 and 92: A steady-state equivalent porous me
Page 93 and 94: with the existing well system witho
Page 95 and 96: Groundwater Issues From Oil and Gas
Page 97 and 98: support provincial regulations and
Page 99 and 100: 319 - Baseline Water Well Testing i
Page 101 and 102: out in heterogeneous and anisotropi
Page 103 and 104: collected can then be used to calcu
Page 105 and 106: Artificial sweeteners (AS) are comm
Page 107 and 108: the environment and (in the few stu
Page 109 and 110: 1 Civil Engineering, University of
Page 111 and 112: Kh estimates within the context of
Page 113 and 114: This presentation will provide an o
Page 115 and 116: 296 - In-Situ Subsurface Remediatio
Page 117 and 118: Milton Quarry. This system is a uni
Page 119 and 120: 171 - Evaluating the Effects of Inc
Page 121 and 122: from the FFT into the lake water vi
Page 123 and 124: significant threats are prohibited.
Page 125 and 126: Groundwater Issues From Oil and Gas
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259 - Assessment of Non-saline Wate
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Regional bedrock potable groundwate
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168 - Deep groundwater systems in s
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Lithological logs from the Alberta
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The change in well water nitrate co
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114 - Validating effects of spring
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1. Should the diversion and use of
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policies. In this paper we present
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254 - Microbial community character
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POSTER SESSION: Agricultural Impact
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setting. Preliminary results from a
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279 - Groundwater nitrate leaching
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compromise between: the number of a
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298 - Fracture network and groundwa
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effects dewatering would have on th
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For this study, impacted groundwate
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257 - Hydrogeological and geochemic
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151 - Prevalence of Arsenic Enrichm
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nearshore groundwater chemistry inc
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POSTER SESSION: Innovation in the R
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278 - Microbial Subsurface Repopula
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in situ treatment of coal tar at a
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within the Quadra aquifer generally
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The aquifer is mostly confined; but
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The Ontario Geological Survey (OGS)
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on producing zone in Alberta. Towar
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and quantity perspectives. This wor
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233 - Using geophysical logs for st
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Earth’s gravitational field from
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Freeze and Cherry, 1979) hypothesiz
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transport. The transport of hydroca
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POSTER SESSION: Workshop on Groundw
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Champ and Janis Gulens of AECL and
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as mountainous terraines, and under
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NOTES: 194 IAH-CNC 2015 WATERLOO CO
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NOTES: 196 IAH-CNC 2015 WATERLOO CO
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