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<br />I <br />I <br />I <br />I <br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I, I <br />I <br />I <br />I <br />I <br />I I <br />I <br /> <br />procedures. The la-year and lOa-year, 24-hour rainfall depths <br />were taken from charts found in the Soil Conservation Service <br />( SCS ) Procedures for Determining Peak Flows in Colorado <br />(Ref. 2), and the lOa-year, 6-hour rainfall depth was taken <br />from an appropriate chart in the SCS National Engineering <br />Handbook (Ref. 4). Aerial adjustments to this rainfall data <br />were made as required in the SCS Handbook. Rainfall depths <br />are given in Table 1. <br /> <br />Table 1 <br />Kiowa Creek Rainfall Data <br /> <br />6-hour (inches) 24-hour (inches) <br /> <br />la-year <br />lOa-year <br /> <br />2.20 <br /> <br />3.75 <br /> <br />2.7 <br />4.0 <br /> <br />RUNOFF COMPUTATIONS <br /> <br />Runoff computations for the Kiowa Creek drainage basin were made <br />using procedures suggested in Technical Manual No. 1 by the <br />U. S. Geological Survey (Ref. 1). The Kiowa Creek basin lies in <br />the Plains Region as defined in Figure 2 of the Manual. The <br />regression equations for peak discharges in this region utilize <br />the basin parameters for drainage area and basin slope. The <br />drainage basin was outlined and the area planimetered on USGS <br />1:250,000 scale topographic maps. The channel length was measured <br />using draftman's dividers and elevations taken from the maps <br />at points 10% and 85% of the total length above the study site <br />to get the basin slope. <br /> <br />Peak discharges were also computed using two Soil Conservation <br />Service methods (Ref. 2 and 4) and by the USGS Index Flood <br />method in Water Supply Paper 1680. These calculations are <br />