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Global positioning system surveying to monitor land subsidence in Sacramento Valley, California, USA

Hydrological Sciences Journal/Journal des Sciences Hydrologiques

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Abstract

A subsidence research program began in 1985 to document the extent and magnitude of land subsidence in Sacramento Valley, California, an area of about 15 600 km2m, using Global Positioning System (GPS) surveying. In addition to periodic conventional spirit levelling, an examination was made of the changes in GPS-derived ellipsoidal height differences (summary differences) between pairs of adjacent bench marks in central Sacramento Valley from 1986 to 1989. The average rates of land subsidence in the southern Sacramento Valley for the past several decades were determined by comparing GPS-derived orthometric heights with historic published elevations. A maximum average rate of 0.053 m year-1 (0.90 m in 17 years) of subsidence has been measured. -Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Global positioning system surveying to monitor land subsidence in Sacramento Valley, California, USA
Series title:
Hydrological Sciences Journal/Journal des Sciences Hydrologiques
Volume
39
Issue:
5
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Hydrological Sciences Journal/Journal des Sciences Hydrologiques
First page:
417
Last page:
429
Number of Pages:
13