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Configuration of the water table, 1970 and 1992, and water-table change between 1970 and 1992 in the Boise area, Idaho

Water-Resources Investigations Report 94-4116

Prepared in cooperation with the City of Boise, Public Works Department, and Idaho Department of Health and Welfare, Division of Environmental Quality
By:
and

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Abstract

A comparison of 1970 and 1992 water-table configuration maps for the Boise area shows that the water table has declined about 10 feet in about 90 percent of the area. Declines exceeded 10 feet in about 50 percent of the area, 20 feet in about 10 percent of the area, and 30 feet in about 5 percent of the area. The largest declines were south of the Boise River between the Ridenbaugh and New York Canals. These declines may be caused in part by the decrease in discharge through irrigation canals during the drought of 1987-92. Small water-level rises were mapped in about 10 percent of the area--in the southeastern part of the Boise area and along the Boise River. This comparative study is the first step in reassessing shallow ground-water conditions in the Boise area in more than 20 years. The 1992 water table was mapped using water-level measurements made in about 170 wells.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Configuration of the water table, 1970 and 1992, and water-table change between 1970 and 1992 in the Boise area, Idaho
Series title:
Water-Resources Investigations Report
Series number:
94-4116
Year Published:
1995
Language:
English
Publisher:
U.S. Geological Survey
Contributing office(s):
Idaho Water Science Center
Description:
1 Plate: 36.90 x 28.79 inches
Country:
United States
State:
Idaho
City:
Boise
Projection:
Universal Transverse Mercator (UTM) projection
Scale:
24000