Ground-water monitoring network (Land use studies)

Ground-water monitoring network (Land use studies)

Ground-water observation well networks were installed in four environmental settings in the White River Basin. Wells in these networks were installed in the first water-bearing zone in order to assess the impact of the overlying land use on ground-water quality. The networks were designed to assess the concentrations and distributions of pesticides, nutrients, and volatile organic compounds in shallow, recently recharged (generally less than 10 years old) ground water in the four different environmental settings.

Well locations within each network were randomly selected. A hollow-stem, rotary auger was used to install the 15- to 67-foot wells. Two-inch diameter polyvinyl chloride (PVC) wells with short screens (2.5 to 7.5 feet) were finished in the uppermost water-bearing unit using procedures described in Lapham and others (1995). Median well yields in the networks of the till plain and glacial lowland were low--0.3 and less than 0.1 gallon per minute, respectively. Wells in the fluvial outwash networks had median well yields of greater than 5 gallons per minute.

A file containing well location, depth, and screened interval information is available for downloading. (Go to Selected data from the White River Basin study available for downloading. Retrieve the file 'gw1sta.txt'.)

WELLS INSTALLED IN AGRICULTURAL AREAS IN THE TILL PLAIN ENVIRONMENTAL SETTING

Twenty-three wells ranging in depth from 16 to 60 feet were installed in this environmental setting.
[Map showing well network in till plain]

WELLS INSTALLED IN AGRICULTURAL AREAS IN THE GLACIAL LOWLAND ENVIRONMENTAL SETTING

Twenty-two wells ranging in depth from 15 to 67 feet were installed in this environmental setting.
[Map showing well network in glacial lowland]

WELLS INSTALLED IN AGRICULTURAL AREAS IN THE FLUVIAL OUTWASH ENVIRONMENTAL SETTING

Twenty-four wells ranging in depth from 15 to 40 feet were installed in this environmental setting.
[Map showing agricultural well network in the fluvial outwash]

WELLS INSTALLED IN URBAN AREAS IN THE FLUVIAL OUTWASH ENVIRONMENTAL SETTING

Twenty-five wells ranging in depth from 18 to 40 feet were installed in this environmental setting.
[Map showing urban well network in the fluvial outwash]

REFERENCE

Lapham, W.W., Wilde, F.D., and Koterba, M.T., 1995, Ground-water data-collection protocols and procedures for the National Water-Quality Assessment Program: Selection, installation, and documentation of wells, and collection of related data: U.S. Geological Survey Open-File Report 95-398, 69 p.

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Last Update: 05/29/2001
This page is maintained by Charles Crawford (send questions or comments to cgcrawfo@usgs.gov).
The URL for this page is http://in.water.usgs.gov/nawqa/wr05002.htm
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