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Hydrogeologic data from a shallow flooding demonstration project, Twitchell Island, California, 1997-2001

Open-File Report 2003-378

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Abstract

Data were collected during a study to determine the effects of continuous shallow flooding on ground-water discharge to an agricultural drainage ditch on Twitchell Island, California. The conceptual model of the hydrogeologic setting was detailed with soil coring and borehole-geophysical logs. Twenty-two monitoring wells were installed to observe hydraulic head. Ten aquifer slug tests were done in peat and mineral sediments. Ground-water and surface-water temperature was monitored at 14 locations. Flow to and from the pond was monitored through direct measurement of flows and through the calculation of a water budget. These data were gathered to support the development of a two-dimensional ground-water flow model. The model will be used to estimate subsurface discharge to the drainage ditch as a result of the pond. The estimated discharge will be used to estimate the concentrations of DOC that can be expected in the ditch.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Hydrogeologic data from a shallow flooding demonstration project, Twitchell Island, California, 1997-2001
Series title:
Open-File Report
Series number:
2003-378
Edition:
-
Year Published:
2003
Language:
ENGLISH
Description:
42 p.