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<br />00058~ <br /> <br />EVALUATION OF THE SURFACE-WATER DATA <br /> <br />PROGRAM IN KANSAS <br /> <br />By P. R. Jordanl and E. R. Hedmanl <br /> <br />ABSTRACT <br /> <br />Stream-gaging stations are operated to provide current streamflow data <br />for project operation or water management, to provide flow information for <br />water quality or sediment records, and to provide data for planning and <br />design of water projects. Little flexibility is possible for stations pro- <br />viding information relating to project operation, water management, water <br />qualitv, or sediment. However, statistical information for planning and <br />design may be determined from a combination of gaging, analytical methods <br />of generalization, and analysis of the effects of regulation of flow. <br /> <br />. <br /> <br />The goals for statistical information proposed in this report are, for <br />principal streams, accuracy equivalent to that of a 25-year record and for <br />other streams, accuracy equivalent to that of a 10-year record. For prin- <br />cipal streams, the goal can be met bV operation of gaging stations for 25 <br />years at appropriate sites. For other unregulated streams draining more <br />than 150 square miles, the goal can be met for medium and high flows by use <br />of the relations between streamflow characteristics and drainage basin <br />characteristics. Low-flow characteristics can be determined by operation <br />of low-flow partial-record stations. Operation of about 100 low-flow <br />partial-record stations is recommended; stations can be moved to new sites <br />after a wide range of low flows has been measured. Many complete-record <br />stations can be discontinued unless theV are needed for current-purpose <br />data. For streams draining less than 150 square miles, gaging should be <br />continued for basins having a variety of physical and climatic characteris- <br />tics to provide data for development of generalization methods. Continua- <br />tion of a network of about 100 high-flow partial-record stations is <br />recommended for a period of at least 5 years. <br /> <br />, <br /> <br />Long-term characteristics of flow in regulated streams will be deter- <br />mined by methods yet to be developed. A pilot study of one regulated <br /> <br />lWater Resources Division, U.S. Geological Survey <br /> <br />. <br />