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U.S. Geological Survey combined well-bore flow and depth-dependent water sampler

John A. Izbicki·Allen H. Christensen·Randall T. Hanson·Peter Martin·Steven M. Crawford·Gregory A. Smith
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Abstract

The U.S. Geological Survey has developed a combined well-bore flow and depth-dependent sample collection tool. It is suitable for use in existing production wells having limited access and clearances as small as 1 inch. The combination of well-bore flow and depth-dependent water-quality data is especially effective in assessing changes in aquifer properties and water quality with depth. These are direct measures of changes in well yield and ground-water quality with depth under actual operating conditions. Combinations of other geophysical tools capable of making these measurements, such as vertical-axis current meters used with wire-line samplers, are commercially available but these tools are large and can not easily enter existing production wells.

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John A. Izbicki, Allen H. Christensen, Randall T. Hanson, Peter Martin, Steven M. Crawford, Gregory A. Smith. 1999-10-10. U.S. Geological Survey combined well-bore flow and depth-dependent water sampler. https://doi.org/10.3133/fs19699

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