Simulation of Water-Management Scenarios for the Mississippi Delta

Scientific Investigations Report 2019-5116
Prepared in cooperation with the Mississippi Department of Environmental Quality
By: , and 

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Abstract

To compare the effectiveness of proposed alternative water-supply scenarios on future water availability in the Mississippi Delta, the U.S. Geological Survey and the Mississippi Department of Environmental Quality are collaborating on the update and enhancement of an existing regional groundwater-flow model of the area. Through this collaboration, the model has been updated to include boundary conditions through March 2014 with the most recent water-use data, precipitation and recharge data, and streamflow and water-level observation data. The updated model has been used to evaluate selected alternative water-supply scenarios to determine relative effects on the Mississippi River Valley alluvial aquifer. Alternative water-supply options evaluated in this report include: (1) irrigation efficiency, (2) on-farm storage and tailwater recovery, (3) instream weirs to increase surface-water availability, (4) intrabasin transfer of surface water, and (5) groundwater transfer and injection. A relative comparison approach was used to calculate the simulated water-level response caused by each scenario. Water-level response is the difference between water levels simulated by the alternative water-supply scenario and those simulated by a base or “no action” scenario. Water-level response in the alluvial aquifer varied for each scenario based on the location, magnitude, and (or) adoption rates of the simulated alternative water-supply option. The groundwater transfer and injection scenario showed the largest water-level response.

Suggested Citation

Haugh, C.J., Killian, C.D., and Barlow, J.R.B., 2020, Simulation of water-management scenarios for the Mississippi Delta: U.S. Geological Survey Scientific Investigations Report 2019–5116, 15 p., https://doi.org/10.3133/sir20195116.

ISSN: 2328-0328 (online)

ISSN: 2328-031X (print)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Purpose and Scope
  • Updates to the Regional Groundwater-Flow Model
  • Water-Management Scenarios
  • Model Limitations
  • Summary
  • Selected References

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Simulation of water-management scenarios for the Mississippi Delta
Series title Scientific Investigations Report
Series number 2019-5116
DOI 10.3133/sir20195116
Year Published 2020
Language English
Publisher U.S. Geological Survey
Publisher location Reston VA
Contributing office(s) Lower Mississippi-Gulf Water Science Center
Description Report: iv, 15 p.; Data Release
Country United States
State Arkansas, Louisiana, Mississippi, Missouri
Other Geospatial Mississippi River Delta
Online Only (Y/N) N