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Seepage Investigation for Selected River Reaches in the Chehalis River Basin, Washington

Scientific Investigations Report 2008-5180

Prepared in cooperation with the Washington State Department of Ecology and the Chehalis Basin Partnership
By:
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Abstract

A study was completed in September 2007 in the Chehalis River basin to determine gain or loss of streamflow by measuring discharge at selected intervals within various reaches along the Chehalis River and its tributaries. Discharge was measured at 68 new and existing streamflow sites, where gains and losses were determined for 36 stream reaches. Streamflow gains were measured for 22 reaches and losses were measured for 13 reaches. No gain or loss was measured at the Chehalis River between the Newaukum and Skookumchuck Rivers. The Chehalis River exhibited a pattern of alternating gains and losses as it entered the area of wide, gentle relief known as the Grand Mound Prairie. The general pattern of tributary ground- and surface-water interaction was discharge to streams (gaining reaches) in the upper reaches and discharge to the ground-water system (losing reaches) as the tributaries entered the broad, flat Chehalis River valley.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Seepage Investigation for Selected River Reaches in the Chehalis River Basin, Washington
Series title:
Scientific Investigations Report
Series number:
2008-5180
Edition:
-
Year Published:
2008
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
Washington Water Science Center
Description:
iv, 13 p.
Time Range Start:
2007-09-01
Time Range End:
2007-09-30