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Ground-water and drainage problems in the Whitney terrace area, Boise, Idaho

Open-File Report 55-192

Prepared in cooperation with the Idaho State Department of Reclamation
By:

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Abstract

Ground-water levels in the Whitney terrace area, after many years of rise owing to downward percolation of water from irrigated land, became nearly stabilized by 1935.  Strong seasonal water-level fluctuations of 8 to 10 feet, however, are common in the Boise Valley.  In recent years, the Whitney terrace has been changing rapidly from a farming to an urban community.  The 3,200-acre area now has about 15,000 inhabitants and the land area is about 35-percent occupied by urban developments.  Population trends indicate that urban expansion will continue.  

Coincident with the change from rural to urban conditions on the Whitney terrace, the patterns of water use were drastically altered.  The amount of irrigated land has decreased but the amount of ground-water recharge from irrigation and yard water may have increased.  Liquid sewage effluent disposed in the ground also has increased the yearly volume of recharge.  The estimated average yearly amount of recharge from all sources now is about 2.4 acre-feet per acre.  Full urban development of the area may increase recharge from all sources to about 3.3 acre-feet per acre.

Ground-water and drainage problems can be relieved by reducing excessive recharge to the ground-water reservoir.  Reduction can be accomplished by economical use of water by individuals, establishment of a water-tight public sewage system to transport all sewage to a central plant outside of the area, and by drainage works.  These measures would cause a net decline of ground-water levels in the area.  They can be undertaken separately or collectively.

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Ground-water and drainage problems in the Whitney terrace area, Boise, Idaho
Series title:
Open-File Report
Series number:
55-192
Year Published:
1955
Language:
English
Publisher:
U.S. Geological Survey
Description:
ii, 25 p., Plate: 9.6 x 10.88 inches
Country:
United States
State:
Idaho
Other Geospatial:
Whitney Terrace Area
Online Only (Y/N):
N
Additional Online Files (Y/N):
N