Master of Science
Deborah D Leslie
Scott S Schoefernacker
The main source for municipal and agriculture water in Shelby County, Tennessee, is groundwater and has been used for municipal water supplies since 1886 because of its superior quality. Groundwater is mostly pumped from the Memphis aquifer, an Eocene-age, unconsolidated, semi-confined sand-rich hydrogeologic unit. Many recent studies have documented modern water recharge entering in the Memphis aquifer in or near major well fields. The proposed study investigates the presence of modern water and recharge sources to the Memphis aquifer at the Memphis, Light, Gas, and Water (MLGW) Mallory well field. The presence of modern water is assessed using solute chemistry, isotopic relations, and hydrologic tracers while predicting pathways could be assessed using geologic cross sections. The conceptual groundwater model that best describes the Mallory well field consists of mainly storage from the Memphis aquifer with minor contributions of distributed leakage through the confining unit. This study demonstrates little modern water recharge to the Memphis aquifer in the Mallory well field based on the geochemistry and the stratigraphic cross sections.
Dissertation or thesis originally submitted to ProQuest.
Mullenax, Heather Debra-Julia, "Investigation of Modern Water Recharge to the Memphis Aquifer at the Mallory Well Field, Memphis, Tennessee" (2022). Electronic Theses and Dissertations. 3269.