Map of water table in Graham County, northwestern Kansas, March 1979

Open-File Report 81-333



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A map of the water table in Graham County provides current (1980) information on water levels in the unconsolidated deposits. Graham County has an area of 900 square miles in northwestern Kansas. The principal source of water for domestic, stock, municipal, and irrigation use if from wells in the shallow unconsolidated deposits. The aquifers occur chiefly in the Ogallala Formation of Miocene age and in deposits of Quaternary age. Water in the aquifers generally downgradient from west to east. In the Ogallala Formation, water also moves toward the stream valleys that drain the uplands. The altitude of the water table varies seasonally in response to changes in recharge and discharge. Major sources of recharge are subsurface flow from the west, leakage from streams, and infiltration of moisture from precipitation. Discharge includes subsurface flow to the east, transpiration by plants, evaporation from the aquifer where the water table is near the land surface, flow from seeps, and pumpage from wells. The altitude of the water table is based on water-level measurements made during March 1979. (USGS)

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Map of water table in Graham County, northwestern Kansas, March 1979
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Open-File Report
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1 map ;38 x 39 cm.