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ARS Home » Southeast Area » Oxford, Mississippi » National Sedimentation Laboratory » Watershed Physical Processes Research » Research » Research Project #433513

Research Project: Modeling Groundwater-surface Water Interactions in the Mississippi River Alluvial Plain

Location: Watershed Physical Processes Research

Project Number: 6060-13000-026-28-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Sep 1, 2017
End Date: Aug 31, 2020

Objective:
1) Determine streambed conductance and aquifer properties from pumping tests, 2) Quantify hydraulic factors impacting streambank filtration processes, 3) Estimate aquifer hydraulic response to groundwater injection, and 4) Quantify potential for stream capture using groundwater wells.

Approach:
National Center for Computational Hydroscience and Engineering (NCCHE) will use the readily available 1D, 2D and 3D modeling capabilities incorporating existing geophysical and hydraulic data to estimate aquifer properties and streambed conductance for the pilot study site. The resulting model will be used to evaluate stream capture potential and near-well hydraulics for application to water resources projects in the region. Specific Research Tasks: Task 1. Determine the aquifer properties using the commercial software AqteSolve and Matlab toolboxes. Task 2. Develop generalized modelling tools to determine streambed conductance using Matlab. Task 3. Develop relations of contaminant concentrations as a function of distance from the river in order to estimate the optimum distance for abstraction wells. Task 4. Estimate the water table response to groundwater injection for multiple injection rates for different injection efficiencies. Task 5. Using the developed modelling tools, quantify the potential stream-capture (flowrate) and hydraulic zone of influence.