Characterization and Modeling of the Ozark Aquifer in Southern Greene County, Missouri PDF Download
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Author: Bradley A. Mitchell Publisher: ISBN: Category : Groundwater flow Languages : en Pages : 138
Book Description
The hydraulic properties of the Ozark aquifer and its upper confining unit were measured as part of the site characterization for the City Utilities Shallow Carbon Sequestration Demonstration Project. The goal was to delineate the cone of depression/capture zone (of any upward leaking CO2) produced by three onsite production wells above the CO2 injection zone and to model future changes in this cone due to increased pumpage in nearby municipal wells. A three month cessation of pumping in two of the three production wells allowed a unique opportunity to measure the aquifer response to the decreased pumping. Aquifer tests yielded limiting transmissivity values of 0.017 to 0.053 ft2/sec. with a median value of 0.029 ft2/sec. and a storativity value centered around 3 x 10-4. Digital model simulations of the steady potentiometric surface closely match measured levels with a calibrated transmissivity of 0.030 ft2/sec and a vertical hydraulic conductivity within the confining unit of 3 x 10-11 ft/sec. Thus, these calibrated values are very consistent with measured values and the calibrated model should provide reasonable estimates of the future capture zone under various pumping scenarios.
Author: Bradley A. Mitchell Publisher: ISBN: Category : Groundwater flow Languages : en Pages : 138
Book Description
The hydraulic properties of the Ozark aquifer and its upper confining unit were measured as part of the site characterization for the City Utilities Shallow Carbon Sequestration Demonstration Project. The goal was to delineate the cone of depression/capture zone (of any upward leaking CO2) produced by three onsite production wells above the CO2 injection zone and to model future changes in this cone due to increased pumpage in nearby municipal wells. A three month cessation of pumping in two of the three production wells allowed a unique opportunity to measure the aquifer response to the decreased pumping. Aquifer tests yielded limiting transmissivity values of 0.017 to 0.053 ft2/sec. with a median value of 0.029 ft2/sec. and a storativity value centered around 3 x 10-4. Digital model simulations of the steady potentiometric surface closely match measured levels with a calibrated transmissivity of 0.030 ft2/sec and a vertical hydraulic conductivity within the confining unit of 3 x 10-11 ft/sec. Thus, these calibrated values are very consistent with measured values and the calibrated model should provide reasonable estimates of the future capture zone under various pumping scenarios.
Author: Emily C. Austin Publisher: ISBN: Category : Aquifer storage recovery Languages : en Pages : 176
Book Description
Regional planners often express concern that the Southwest Missouri water-supply capacity will soon be exceeded and that the main (Ozark) aquifer is insufficient to handle increased demand. Base-flow recession data from six watersheds in Greene County were analyzed with three hydrograph-analysis packages (PART, RECESS, RORA). This analysis indicates that annual recharge to the upper aquifers in this area is approximately 6-10 inches. Two USGS observation wells and a City Utilities of Springfield pumping well were used to calculate hydraulic properties of the confining unit and the Ozark aquifer using both analytical (AQTESOLV) and digital models (Visual MODFLOW). Leakance (vertical hydraulic conductivity divided by thickness) of the Ozark Confining Unit, was estimated to range from approximately 5 x 10−7 day−1 to 4 x 10−8 day−1, depending primarily on thickness of the confining unit. Leakance was then used to calculate a weighted mean of leakage rates into the lower confined Ozark aquifer using ESRI Arc Map 10.0. With current water levels, leakage (recharge) to the confined Ozark aquifer was estimated to be between 0.11 and 0.20 inches year−1. Together, these results will help to inform regulators and planners on recharge rates into the Ozark Aquifer under varying conditions, as well as the potential magnitude of sustainable ground-water pumpage in southwest Missouri.
Author: U.S. Department of the Interior Publisher: CreateSpace ISBN: 9781496123930 Category : Reference Languages : en Pages : 68
Book Description
To assess the effect that increased water use is having on the long-term availability of groundwater within the Ozark Plateaus aquifer system, a groundwater-flow model was developed using MODFLOW 2000 for a model area covering 7,340 square miles for parts of Arkansas, Kansas, Missouri, and Oklahoma. Vertically the model is divided into five units. From top to bottom these units of variable thickness are: the Western Interior Plains confining unit, the Springfield Plateau aquifer, the Ozark confining unit, the Ozark aquifer, and the St. Francois confining unit. Large mined zones contained within the Springfield Plateau aquifer are represented in the model as extensive voids with orders-of-magnitude larger hydraulic conductivity than the adjacent nonmined zones.
Author: Bradley A. Mitchell
Author: Bradley A. Mitchell
Author: Joseph M. Richards
Author: Emily C. Austin
Author: U.S. Department of the Interior
Author: Jeffrey L. Imes
Author: 
Author: Jeffrey L. Imes
Author: 
Author: Dayla Dintelmann
Author: James E. Vandike