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<br />001871
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<br />IN REPLY REFER TO:
<br />
<br />United States Department of t~ lnterio;
<br />
<br />GEOLOGICAL SURVEY ./
<br />Box 25046
<br />Denver Federal Center
<br />Denver. Colorado 80225
<br />December 30, 1975
<br />
<br />Water Resources Division
<br />Colorado District
<br />Mail Stop 415
<br />
<br />INFORMATION FOR THE PRESS
<br />
<br />RECEIVED
<br />.JAN 0' 'l 1970
<br />
<br />SUBJECT: HYDROLOGY OF THE SOUTH PLATTE RIVER VALLEY,
<br />NORTHEASTERN COLORADO
<br />
<br />RELEASE DATE: Immediately
<br />
<br />COLO. w^'r~
<br />(:QNSERVAHtl!'i !J,Ji,i\u
<br />
<br />FOR ADDITIONAL INFORMATION CONTACT:
<br />
<br />J. E. Biesecker, District Chief
<br />U.S. Geological Survey, WRD
<br />Colorado District, Mail Stop 415
<br />Box 25046, Denver Federal Center
<br />Denver, Colorado 80225
<br />Telephone: 234-3815
<br />
<br />A new report has been prepared by the U.S. Geological Survey, Colorado Water
<br />Resources Circular 28, "Hydrology of the South Plafte River valley, northeastern
<br />Colorado." The report describes the hydrologic and geologic components of the
<br />South Platte River aquifer system, in an area of about 950 square miles along
<br />the South Platte River between Henderson, Colo., and the Colorado-Nebraska State
<br />line. The report is the result of a cooperative study by the U.S. Geological
<br />Survey and the Colorado Division of Water Resources, Office of the State Engi-
<br />neer, and the Colorado Water Conservation Board. '
<br />
<br />The purpose of the investigation was to describe hydrologic and geologic compo-
<br />nents of the area, emphasizing information that would be needed by water plan-
<br />ners, administrators, and legislative bodies to manage the system. In the South
<br />Platte River valley, surface water and ground water are components of one hy-
<br />draulic system, and water-management planners need to consider the interrelation
<br />between these two components. The description of the hydrologic system and its
<br />operation as presented in this newly released report provide a foundation upon
<br />which such an analysis can be made. The report deseribes surface-water flows,
<br />diversion, and application; description of the physical dimensions and character
<br />of the valley-fill aquifer, location and rates of ground-water diversions, and
<br />quantitative determination of various elements of the hydrologic cycle--~uch as
<br />ground-water recharge, return flow to the river, and evapotranspiration.
<br />
<br />The principal use of water in the study area is for irrigation. During 1947-70
<br />the surface-water diversions averaged 981,000 acre-feet annually and ground-water
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