Inferring aquifer storage parameters using satellite and in situ measurements: Estimation under uncertainty

Edited: 2011-02-21
TitleInferring aquifer storage parameters using satellite and in situ measurements: Estimation under uncertainty
Publication TypeJournal Article
Year of Publication2010
AuthorsSun, A. Y., R. Green, M. Rodell, and S. Swenson
JournalGeophysical Research Letters
Volume37
Pagination10401
Date Published05/2010
Keywordsclimate, grace, terrestrial_water
AbstractWe present a robust optimization method for estimating aquifer storage parameters (specific yield or storativity) using the Gravity Recovery and Climate Experiment (GRACE) data, in situ well level observations, and other ancillary information. Uncertainty inherent in the remotely sensed and in situ time series can adversely affect the parameter estimation process and, in the worse case, make the solution completely meaningless. Our estimation problem is formulated to directly minimize the negative impact of data uncertainty by incorporating bounds on data variations. We demonstrate our method for the interconnected Edwards-Trinity Plateau and Pecos Valley aquifers in central Texas. The study area is divided into multiple zones based on the geology and monitor well coverage. Our estimated aquifer storage parameters are consistent with previous results obtained from pumping tests and model calibration, demonstrating the potential of using GRACE data for validating regional groundwater model parameters.
URLhttp://adsabs.harvard.edu/abs/2010GeoRL..3710401S
DOI10.1029/2010GL043231