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Recharge Pathways And Mechanisms To The Memphis Aquifer, John Michael Bursi
Recharge Pathways And Mechanisms To The Memphis Aquifer, John Michael Bursi
Electronic Theses and Dissertations
As the primary source of water for Memphis, Tennessee and surrounding areas, the Memphis aquifer is an important natural resource. Recharge to the Memphis aquifer, which is thought to occur by infiltration of precipitation in the exposure belt, is impeded by Quaternary loess and paleosols on the upland surfaces. This study investigated whether incised stream gullies provide a faster rate of infiltration, and potential recharge, relative to the upland surfaces. Through a year of monitoring of physical hydrology and water chemistry within a watershed at the Pinecrest research site, located in Fayette County, Tennessee, along with the implementation of environmental …
The Source Of Saline Groundwater In The Mississippi River Valley Alluvial Aquifer In Southeast Arkansas, Justin Michael Paul
The Source Of Saline Groundwater In The Mississippi River Valley Alluvial Aquifer In Southeast Arkansas, Justin Michael Paul
Electronic Theses and Dissertations
In this study, the source of historical chloride anomalies in the Mississippi River Valley alluvial aquifer from southeast Arkansas is investigated using spatial statistical and geochemical techniques. The spatial statistical and geochemical techniques are employed to determine whether the source of the saline groundwater is due to evaporative processes in the soil column, injection of saline fluids from depth, or infiltration from rivers. Spatial statistical analyses show chloride anomalies in the alluvial aquifer are more closely related to tectonic features associated with the injection of saline fluids from depth than evaporative concentration of soil waters that may have recharged groundwater. …
Performing A Steady-State Seepage Analysis Using Seep/W : A Primer For Engineering Students., Matthew R. Broaddus
Performing A Steady-State Seepage Analysis Using Seep/W : A Primer For Engineering Students., Matthew R. Broaddus
Electronic Theses and Dissertations
This thesis is comprised of five independent modules that were developed to provide a primer to understanding groundwater seepage. These modules serve as the template to conduct steady-state seepage analyses through embankments utilizing SEEP/W, a finite element seepage modeling program. Module 1 and 2 are more theoretical in nature to provide the background knowledge necessary to conduct a steady-state seepage analysis, while Modules 3, 4, and 5 focus more on the application of seepage models and how they can be used to solve various groundwater seepage problems. Supplementary material, including PowerPoint presentations, handouts, and a manual on how to utilize …
Well Water Quality In Southern Butler County, Pennsylvania, Scott Mayes
Well Water Quality In Southern Butler County, Pennsylvania, Scott Mayes
Electronic Theses and Dissertations
The increase in unconventional shale gas extraction in Pennsylvania has resulted in an increased number of groundwater contamination claims. Well water quality was investigated in southern Butler County, PA where 387 unconventional gas wells have been drilled since 2006. A total of 121 households participated in a survey and 238 well water samples were tested. Specific conductivity, pH, and dissolved oxygen in these samples were measured in the field and seven anion concentrations and thirty metal concentrations were measured in the lab. A subset of 91 water wells was also tested for light hydrocarbons (methane, ethane, ethylene, propylene, propane, butane). …
Characterization Of Groundwater Discharge In A Back Barrier Tidal Creek, Matthew L. Carter
Characterization Of Groundwater Discharge In A Back Barrier Tidal Creek, Matthew L. Carter
Electronic Theses and Dissertations
Groundwater discharge in the coastal environment is known to be a complex process. The driving mechanisms of groundwater discharge vary on spatial and temporal scales that can significantly impact coastal water chemistry and play a role in ecological zonation. Evolving combinations of observational and modeling approaches provide a basis to quantify groundwater discharge in a spatial and temporal sense. Here we employ a combination of geochemical (naturally occurring radon isotope) and geophysical (electrical resistivity) techniques to measure groundwater-surface water interactions along a back-barrier tidal creek. In addition to field measurements, a unique non-steady state radon mass balance equation was developed …
Quantifying Water Budgets To Evaluate The Hydrologic Performance Of Two Stormwater Detention Ponds In Coastal South Carolina, Samantha Corley
Quantifying Water Budgets To Evaluate The Hydrologic Performance Of Two Stormwater Detention Ponds In Coastal South Carolina, Samantha Corley
Electronic Theses and Dissertations
Due to their ability to reduce local flooding and protect receiving waters from intense stormwater pulses, stormwater detention ponds are commonly used stormwater management practices. Stormwater engineers construct ponds to moderate peak flow intensities and to allow residence time of the water within the pond to enhance nutrient removal prior to discharging into downstream ecosystems. Yet rarely, if ever, is the functionality of these ponds verified post-construction. This study aimed to compare hydrologic performance of two stormwater detention ponds located in coastal South Carolina to theoretical design plans by assessing a high resolution water budget. Inflow components of the water …
Identifying A Mechanism For An Infiltration Threshold From The Sunflower River, Ms To The Underlying Alluvial Aquifer, Austin Cole Patton
Identifying A Mechanism For An Infiltration Threshold From The Sunflower River, Ms To The Underlying Alluvial Aquifer, Austin Cole Patton
Electronic Theses and Dissertations
Long-term groundwater level and stream stage measurements at a USGS coupled groundwater stream-gaging station located on the Sunflower River in Sunflower, MS show an apparent stage-threshold for infiltration to the underlying alluvial aquifer. This site is located near the center of a large regional groundwater cone of depression in the Mississippi River Valley alluvial aquifer. The USGS well (termed well 3 in this study) was thought to be completed in the regional shallow aquifer, though often recording anomalously high water levels relative to other wells in the region. The purpose of this research was to identify the responsible mechanism for …