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000590 useful in hydrologic studies and in planning, designing, and operating systems for controlling water or pollution. For example, data on the geo- metry of stream channels may be useful in appraising the use of a stream for recreation and in determining its capacity to assimilate waste; pro- files of flood elevations are used in determining areas subject to inunda- tion by floods; information on aquifer characteristics is valuable in hydrologic studies of the variability of low flow, and in planning the conjunctive use of surface water and ground water. GOALS OF KANSAS STREAMFLOW PROGRAM The objective of the Kansas streamflow data program is to provide information on flow at any point on any stream. Within this general objec- tive, specific goals are set for each of the four types of data that repre- sent' the particular information that is needed. Acceptable accuracy levels are also specified because accuracy levels not only govern cost and tech- niques used in providing information, but also provide a measure of specific goals. The uses of streamflow information in planning, design, and opera- tion of water-related facilities and activities are illustrated in table I. Table 1 .--Examples of surface-water information used in planning, design, and operation of water-related facilities and activities. Problem Sub-problem Surface-water Information needed Irrigation Reservoir design, traditional method Twenty or more years of monthly flows; monthly evaporation; peak- flow frequency. Reservoir design, simulation method Mean and standard deviation of flows for each month, serial correlation of monthly flows, and a stochastic ,model; monthly evaporation; peak- flow frequency. Operation Current records of inflow and out- flow; reservoir contents. Flood forecasting Current records of streamflow and stage; stage-discharge relation; flood-routing coefficients; pre- cipitation; deterministic model. 13