Abstracts

Towards an understanding of surface and groundwater exchange through tailwater recovery system

Author(s): Rogers, J.; Baker, B.; Czarnecki, J.

A long-term trend of depletion of groundwater levels are the result of significant withdrawals from the Mississippi Alluvial Aquifer for irrigation purposes. Tailwater recovery systems, a best management practice to re-use surface water for irrigation purposes, are being implemented by many agricultural producers throughout the Mississippi Alluvial Valley, however, there is very little scientific evidence that proves these systems have the ability to reduce aquifer depletion. To investigate surface-groundwater interactions in these systems, steel piezometers equipped with multiple loggers that measure temperature, atmospheric pressure, and depth were installed in two tailwater recovery systems.It’s anticipated that the collection of this data will be appropriate to develop a ground and surface water flow and heat transport mode using VS2DH resulting in the current area of interest that these systems potentially serve as a recharge mechanism. The magnification of ground and surface water exchange could provide the additional data for those estimating Aquifer levels, as well as, assist policymakers in implementing techniques to appropriately manage this critical resource. In addition, the collection of surface and groundwater samples was endeavored to determine any water quality impacts resulting from ground and surface water exchange.

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