HR: 09:15h
AN: H11G-06    [Abstracts]
TI: Ground Water Storage Variability in the Mississippi River Basin and Potential Estimation Using GRACE
AU: * Rodell, M
EM: Matthew.Rodell@nasa.gov
AF: NASA Goddard Space Flight Center, Hydrological Sciences Branch, Code 614.3, Greenbelt, MD 20771 United States
AU: Rowlands, D
EM: drowland@bowie.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Space Geodesy Branch, Greenbelt, MD 20771 United States
AU: Klosko, S
EM: sklosko@sgt-inc.com
AF: SGT Inc., 7701 Greenbelt Road, Suite 400, Greenbelt, MD 20770 United States
AU: Lemoine, F
EM: flemoine@bowie.gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Space Geodesy Branch, Greenbelt, MD 20771 United States
AU: Luthcke, S
EM: Scott.B.Luthcke@nasa.gov
AF: NASA Goddard Space Flight Center, Space Geodesy Branch, Greenbelt, MD 20771 United States
AU: Chen, J
EM: chen@csr.utexas.edu
AF: Center for Space Research The University of Texas, 3925 W. Braker Lane, Suite 200, Austin, TX 78759 United States
AU: Famiglietti, J
EM: jfamigli@uci.edu
AF: The University of California, Irvine, Department of Earth System Science, Irvine, CA 92697 United States
AU: Wilson, C
EM: crwilson@mail.utexas.edu
AF: The University of Texas, Department of Geological Sciences, Austin, TX 78712 United States
AB: Ground water may be a significant component of the water cycle, but little is known of its variability at regional scales. In this study, ground water storage changes in the Mississippi River basin and its four major sub-basins were estimated from multiyear time series of water level measurements. Approximately 60 wells were selected from the US Geological Survey's online archive based primarily on the following criteria: length and completeness of the record, location in an unconfined aquifer, and minimal direct anthropogenic influence. Well levels were converted to water storage changes using aquifer-specific estimates of the specific yield. Area weighted averaging was used to produce time series for each of the basins. These were then compared with model based estimates of soil moisture and snow water storage in order to understand the relative contribution of ground water to the regional water budget. Furthermore, estimates of total terrestrial water storage changes in the river basins were derived from Gravity Recovery and Climate Experiment (GRACE) satellite observations. Analyzing these in light of the ground water and modeled soil moisture and snow water storage changes provides insight toward the potential for disaggregating GRACE terrestrial water storage estimates into changes in the individual components, including ground water.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1829 Groundwater hydrology
DE: 1836 Hydrological cycles and budgets (1218, 1655)
DE: 1855 Remote sensing (1640)
DE: 1876 Water budgets
SC: Hydrology [H]
MN: Fall Meeting 2005