Determination of Land Subsidence Related to Ground-water-level Declines Using Global Positioning System and Leveling Surveys in Antelope Valley, Los Angeles and Kern Counties, California, 1992
U.S. Department of the Interior, U.S. Geological Survey, 1994 - Global Positioning System - 101 pages
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accuracy adjustment Angeles County Antelope Valley aquifer aquifer-system Avenue average Base becomes bench marks BOUNDARY calculated California changes compaction Continued contour control stations coordinates Dashed where uncertain Datum decline deep aquifer determined differences dirt rq drive edge elevation error estimated exit EXPLANATION feet Figure ft above ls Geodetic Global Positioning System ground-water levels head height historical HPGN HYDROGRAPH INCLUDED increased indicate intersection Interval KILOMETERS Lakebed LANCASTER GROUND-WATER SUBBASIN land subsidence Last recovered leveling locations magnitude Map numbers maximum measured mile monitoring monument Note occurred Palmdale period Positioning primary projecting rates of subsidence relative REPORT Road Rosamond Blvd selected shows Sierra Highway Sierra Hwy stations Street East stress surface thence track USC&GS USGS vector vertical vertical-control stations water-level Water-level elevation West witness post