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Water --- Pollution. --- Ohio River.
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Stream measurements --- Water-supply --- Missouri River Watershed.
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Geology --- Groundwater --- Colorado. --- Arkansas River Valley --- Colorado
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Groundwater --- Arkansas River. --- Kansas. --- United States
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Irrigation --- Stream measurements --- Water resources development --- Water-supply --- Mississippi River Watershed. --- Ohio River Watershed.
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Geology --- Groundwater --- Geology. --- Groundwater. --- Colorado. --- Arkansas River Valley --- Colorado
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