Premium
Inferring aquifer storage parameters using satellite and in situ measurements: Estimation under uncertainty
Author(s) -
Sun Alexander Y.,
Green Ronald,
Rodell Matthew,
Swenson Sean
Publication year - 2010
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2010gl043231
Subject(s) - aquifer , calibration , environmental science , groundwater , plateau (mathematics) , estimation theory , satellite , geology , hydrology (agriculture) , soil science , remote sensing , computer science , statistics , geotechnical engineering , algorithm , mathematics , engineering , mathematical analysis , aerospace engineering
We 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.