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000602 (3) Stations on regulated streams, shown on figure 9. (4) Long-term trend stations, shown on figure 10. The proposed networks Include nine new stations on principal streams and six new stations on minor streams. The records for the new stations on minor streams coupled with records for about 25 existing stations will' eventually permit reglonalization of flow characteristics for all minor streams Including those with drainage areas less than ISO sq ml and those with unusual combinations of physical and climatic characteristics. The stations in the proposed networks are all shown In table 3; the 19 existing stations that are not recommended for continuation are identified by brackets. Frequent appraisal of the networks Is recommended In light of changes In needs for current-purpose data or as additional goals for sta- tistical flow characteristics are met. 2. High-flow partial-record stations The purpose of these stations is to define flood frequency for small drainage areas. Continuation of this network is recommended for a period of at least S years. At the end of the S-year period, sufficient record will be available at all small area stations to define the 2-year flood. Also, sufficient data should be available at the stations equipped with stage and rainfall recorders to define the parameters in a rainfall-runoff model such as described by Lichty and others (1968). The records of annual peak flow at these stations can then be extended in time by use of the model and long-term rainfall records. This will permit definition of the SO-year flood and the ratio of SO-year flood to 2-year flood (QSO/Q2) at these stations. Generalization of the data can then be accomplished by regressions relating the 2-year flood and QSO/Q2 to basin characteristics. An extension of this network is proposed to sample basins in urban and suburban areas where the type of land use greatly Increases the magnitude of flood peaks and where data are not now available to define flood fre- quency under these conditions. High-flow partial-record stations equipped with stage and rainfall recorders have 'been installed In the metropolitan area of Wichita In cooperation with the city. They also should be installed in a minimum of IS urban drainage areas with varying characteristics in other major cities in Kansas and should be operated for a minimum of S years. . 3. Low-flow partial-record stations The network of 6S low-flow partial record stations has been operated for about 15 years. An evaluation of the data obtained at each station is being conducted to determine if adequate correlations can be established with Index stations. Judgment on these stations should be reserved until this evaluation Is complete. 37