Filters: Tags: Interferometric Synthetic Aperture Radar (X) > Categories: Data (X)

Filters Date Range Past year (1) Past month (1) Past week (1) Past day (0) Custom range... To   Search Contacts Justin Brandt U.S. Geological Survey, SOUTHWEST REGION U.S. Geological Survey - ScienceBase Justin T. Brandt Michelle Sneed Scott E. Boyce Tag Types Theme (1) Place (1) Tag Schemes None (1) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV

Interferometric Synthetic Aperture Radar Data Used as Subsidence Observations for Model Calibration, Central Valley, California The Central Valley, and particularly the San Joaquin Valley, has a long history of land subsidence caused by groundwater development. The extensive withdrawal of groundwater from the unconsolidated deposits of the San Joaquin Valley lowered groundwater levels and caused widespread land subsidence—reaching 9 meters by 1981. More than half of the thickness of the aquifer system is composed of fine-grained sediments, including clays, silts, and sandy or silty clays that are susceptible to compaction. In an effort to aid water managers in understanding how water moves through the aquifer system, predicting water-supply scenarios, and addressing issues related to water competition, the United States Geological Survey... Categories: Data; Tags: California, Central Valley, Interferometric Synthetic Aperture Radar, Subsidence, biota