Parent Layer: Groundwater Management Areas

Name: Groundwater Availability GTRKR

Display Field: ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This dataset was digitized from a scanned map published by the U.S. Geological Survey in cooperation with the Department of Housing and Urban Development. Four ranges in probable yield, based on adequacy of them range in yield for major beneficial uses of water, are given. The ranges are related to the concept of normal probability; that is, well yields are expressed in terms of the 68- and 95-percent levels of chance. For example, there is a 68-percent chance that wells in areas designated A well yield from 0.5 to 5 gpm (gallons per minute) and a 95-percent chance that wells in such areas will yield from 0.1 to 10 gpm, assuming operation without excessive drawdown. Thus, it can be expected that most wells drilled in area A will obtain water supplies marginal to adequate for domestic purposes, that most wells will yield fewer than 10 gpm, and that some wells will be virtually dry.

Service Item Id: 44eeaa3c51234a64af0653039c5c2a25

Copyright Text: This report was prepared by the U.S. Geological Survey in cooperation with the Department of Housing and Urban Development as part of the San Francisco Bay region environment and resources planning study. The work was done intermittently between 1970 and 1972 under the general supervision of R. S. Lord and L. R. Peterson, successive district chiefs in charge of water-resources investigation; in California, and under the immediate supervision of L. E Young, chief of the Menlo Park subdistrict.

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Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

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Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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