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quality in various hydrogeological conditions in order to protect water at the source. As part of a broader nitrate study considering climate change impacts and sensitive aquifers, the objective of this specific research is to quantify the movement of nitrate through the root zone to the groundwater under different crop types using process-based modelling software. Research sites are selected in Ontario overlying different geological settings that are potentially sensitive to contamination from land-applied substances (fractured sedimentary bedrock aquifers and sandy aquifers). Nine different sites in Halton Region, Arkell Research Station (Guelph), and Norfolk County were selected to install twenty seven suction lysimeters at a depth of 40 cm below soil surface. The selection criteria for installation of the lysimeters are based on different crop types and proximity to groundwater wells in the vicinity of the fields. The shallow subsurface samples will be collected monthly from April to August 2015 and analyzed for nitrate nitrogen and ammonium nitrogen. DRAINMOD-N, a process-based model that simulates both hydrology (1-D flow) and nitrogen losses in the shallow subsurface on daily, monthly, yearly bases, is used to quantify nutrient transport below the root zone from different crop types and variable weather scenarios. Functional relationships are used in DRAINMOD-N to quantify fertilizer dissolution, plant uptake, denitrification, net mineralization, runoff and drainage losses to groundwater. The results of this surface-to-root zone transport study will be used as the input for groundwater models that will simulate nitrogen transport under a variety of crop and climate conditions. The research results can be applied specifically to nutrient management and farm source water protection initiatives. Groundwater/Surface Water Interaction 3 Thursday October 29, 10:10 – 11:50 Chair: Saskia Noorrduijn Room: Strauss 223 - Integrated groundwater/surface water modelling to assess urban development and detailed stormwater design – Babcock Ranch Community Development, Lee County, Florida E.J. Wexler 1 , G.F. Rawl 2 , P.J. Thompson 1 , & J.D.C. Kassenaar 1 1 Earthfx Incorporated, Toronto, Ontario, Canada 2 Greg F. Rawl, P.G., Fort Myers, Florida, USA Integrated groundwater/surface water models are typically thought of as research tools, yet they can be applied in a practical manner to study impacts of land development and to assess the effectiveness of engineered mitigation measures. An integrated model was applied to predict change to shallow groundwater and surface water at the proposed Babcock Ranch Community (BRC) development in Lee County, FL. The BRC will have 19,500 homes in concentrated “development pods”, with the remaining acreage left as wetland preserves and natural areas. IAH-CNC 2015 WATERLOO CONFERENCE 85
An integrated model was determined to be most appropriate tool for simulating groundwater and hydrologic response. There is considerable groundwater/surface water interaction across the site due to the shallow water-table and numerous streams and wetlands. The system is highly transient due to large rainfall events in the wet season. The area has been subject to severe drought and extreme wet years during the last decade. The integrated model was built using the USGS GSFLOW code. The hydrologic model (PRMS) was fully distributed with the soil water balance solved on the same 300 x 300 foot grid used by the groundwater model. Over 600 wetlands and lakes were represented in the Current Conditions model along with all mapped streams and agricultural drains. The model was calibrated for WY2007 to WY2010 to flow at 10 gauges, wetland stage data, and heads at 165 observation wells. To represent Natural Conditions, the calibrated model was modified by removing all anthropogenic features such as roads, ditches, berms and water control structures that affected drainage and overland flow. Vegetative cover was also converted from agricultural to pre-settlement cover type and density. For Post-development Conditions, 142 stormwater ponds and with control structures and connections were added to the model. The ponds were designed to capture a portion of urban runoff. Leakage from the ponds is intended to raise groundwater levels and to hydrate nearby wetlands. Model simulations predicted streamflow, wetland stage, and groundwater heads on a daily basis for the three scenarios. Hydrographs and maps of net change in groundwater recharge and wetland hydroperiod were produced. Model comparisons showed that the stormwater management ponds helped mitigate changes due to increased imperviousness (up to 58% in the development pods) and confirmed that the changes would moderate stream flows, increase wetland hydroperiod, and generally restore “natural” conditions for the groundwater and surface water systems. 209 - The Influence of storm sewers on groundwater-surface water interaction Martin Shepley & Nick Schmidt Amec Foster Wheeler, Hamilton, Ontario, Canada Ron Scheckenberger & Matt Senior Amec Foster Wheeler, Burlington, Ontario, Canada Urbanization of watersheds and increase in impermeable surfaces can strongly affect groundwater discharge, both in terms of quantity and recession characteristics. Storm sewers are generally not considered to affect groundwater discharge greatly as they are primarily seen as conveyances of runoff water. However, storm sewers leak and this leakage may increase over time as infrastructure ages. This paper presents results of a long-term monitoring program from an urbanised till plain setting that has collected detailed water level data from storm sewers, storm sewer trenches and the shallow groundwater system adjacent to creek. Storm sewer leakage tests have also been undertaken that allow the assessment of the interaction between the storm sewer 86 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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WEDNESDAY PROGRAM AT A GLANCE Wedne
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WEDNESDAY PROGRAM AT A GLANCE Time/
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THURSDAY PROGRAM AT A GLANCE 8:30 -
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THURSDAY PROGRAM AT A GLANCE Time/H
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FRIDAY PROGRAM AT A GLANCE 7:15 - 8
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 and 76: This paper outlines the District’
Page 77 and 78: 219 - Current results and outcomes
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: 277 - Assessing soil water content
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
Page 127 and 128: 259 - Assessment of Non-saline Wate
Page 129 and 130: Regional bedrock potable groundwate
Page 131 and 132: 168 - Deep groundwater systems in s
Page 133 and 134: Lithological logs from the Alberta
Page 135 and 136: 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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