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<br />CONTENTS--Continued <br /> <br />Page <br /> <br />Figure 6. Relation between effective drainage area and Ql00 by the <br />station-year and multiple-regression methods. The Ql00 <br />for 15 study and 28 nonstudy stations and the peak <br />discharge of floods of unknown frequency at 34 mis- <br />cellaneous sites are also shown------------------------------ 22 <br />7. Comparison of a synthetic hydrograph with a recorded hydro- <br />graph for an 8.25-square-mile basin-------------------------- 28 <br /> <br />Table 1. <br /> 2. <br /> 3. <br /> 4. <br /> 5. <br /> 6. <br /> 7. <br /> 8. <br /> 9. <br /> <br />TABLES <br /> <br />Page <br />Rainfall-runoff stations in the Arkansas River basin------------- 4 <br />Observed, synthetic, and weighted flood-frequency relations------ 8 <br />Results of station-year method----------------------------------- 24 <br />Summary of equations for estimating the characteristics of <br />flood flows from small rural watersheds in the Arkansas <br />River basin---------------------------------------------------- 25 <br />Calculated synthetic hydrograph for the estimated 25-year peak <br />discharge on an 8.25-square-mile basin------------------------- 27 <br />Results of calibration of rainfall-runoff model------------------ 36 <br />Historical peak discharges for 34 miscellaneous small rural <br />watersheds in the South Platte and Arkansas River basins------- 38 <br />Basin characteristics used in multiple regresssion analysis------ 40 <br />Observed and estimated 100-year peak discharge for 28 nonstudy <br />- stations within and adjacent to the Arkansas River basin in <br />Colorado------------------------------------------------------- 42 <br /> <br />METRIC CONVERSIONS <br /> <br />Inch-pound units in this report may be converted to metric units by the <br />following conversion factors: <br /> <br />~ <br />25.40 <br />O.3D48 <br />1.609 <br />2.590 <br /> <br />To obtain <br /> <br />Multiply <br /> <br />inch (in.) <br />foot (ft) <br />mile (mi) <br />square mile (mi2) <br />cubic foot per second <br />(ft3/s) <br />acre-foot (acre-ft) <br /> <br />millimeter (mm) <br />meter (m) <br />kilometer (km) <br />square kilometer (km2) <br />cubic meter per second <br />(m3/s) <br />cubic hectometer (hm3) <br /> <br />0.02832 3 <br />1.233x10- <br /> <br />iv <br />