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Digital model simulation of the hydrologic flow system, with emphasis on ground water in Spokane Valley, Washington and Idaho

Open-File Report 80-1300

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,

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Abstract

A digital-computer model of the hydrologic flow system, with emphasis on ground water, was developed for the Spokane Valley, Washington and Idaho. The current rate of ground water pumping has little effect on water levels in the Spokane aquifer, although short-term water-level declines occur locally. The model was used to show the effects of increased ground-water pumping on aquifer heads and streamflow. Increasing the pumping rates, by a factor of 2 from the 1977 rates, lowered water levels in the Spokane aquifer less than 3 feet during a 1-year simulation. Doubling the ground-water pumping caused a decrease in discharge of the Spokane River, as measured at Spokane, of about 150 cubic feet per second during the summer months and about 50 cubic feet per second during the rest of the year. The leakage from the aquifer to the Little Spokane River was decreased by less than 10 cubic feet per second by doubling the ground-water pumping. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Digital model simulation of the hydrologic flow system, with emphasis on ground water in Spokane Valley, Washington and Idaho
Series title:
Open-File Report
Series number:
80-1300
Edition:
WRI/OFR
Year Published:
1980
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
52 p. :ill., maps ;28 cm.