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Report: Impact of Cumulative Groundwater Withdrawal on Surface Water and Groundwater Interaction in the Stoney Creek Watershed
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If you have any questions on the information presented, or require additional report data or attachments, please contact the
Ministry.
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An integrated groundwater and surface water interaction model was developed to simulate the effects of cumulative groundwater withdrawal on surface flow in the Stoney Creek watershed in British Columbia, Canada.
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Author: Davood Mahmoodzadeh, Jun Yin, and Jianbing Li
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Date Published: Feb 2025
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Report ID: 63161
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Audience: Government and Public
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An integrated groundwater and surface water interaction model was developed to simulate the effects of cumulative groundwater withdrawal on surface flow in the Stoney Creek watershed in British Columbia, Canada. A 3-D numerical model was created using the MODFLOW-USG code. The modelling domain and aquifer hydraulic parameters are based on recent aquifer mapping in the Vanderhoof area. Model development employed a high-resolution Digital Elevation Model (DEM) to capture the river morphology and the heterogeneity of the local groundwater system. The model was calibrated for steady-state and transient conditions based on groundwater and Stoney Creek water level measurements collected from 2015 to 2017. Static groundwater level measurements recorded in the provincial GWELLS database for wells in both unconfined and confined aquifers were also used in the model calibration. The model calibration parameters included the hydraulic conductivity of geologic units, streambed hydraulic conductivity, and infiltration coefficients. These parameters were calibrated using the automated parameter estimation model (PEST) and by trial-and-error methods. A sensitivity analysis was conducted to evaluate the influence of the main modelling parameters on simulations results. The calibrated model was used to assess the influence of different pumping, climate, and groundwater level scenarios on groundwater-surface water interaction in Stoney Creek. Finally, a risk map showing the influence of each pumping well on groundwater-surface water interaction and potential streamflow capture was prepared for current pumping conditions.
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Report Type
Subject
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Region - Omineca |
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Watershed Groups - 180 - Nechako |
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Water Information - Groundwater |
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Water Information - Water Management |
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