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<br />DRAINAGE CRITERIA MANUAL <br /> <br />RUNOFF <br /> <br />. <br /> <br />RUNOFF <br /> <br />CONTENTS <br /> <br />1. RUNOFF ANALYSIS <br /> <br />1.1 Analytical Methods <br />1.2 Applicability of Methods <br />1.3 Future Runoff Analysis Modifications <br /> <br />2. EFFECTIVE RAINFALL FOR CUHP <br /> <br />2.1 Pervious - Impervious Areas <br />2.2 Depression Losses <br />2.3 Infiltration <br />2.3.1 Horton's Equation <br />2.4 Example - Effective Rainfall <br /> <br />3. RATIONAL METHOD <br /> <br />. <br /> <br />3.1 Rational Formula <br />3.3 Limitations <br />3.4 Time of Concentration <br />3.4.1 Time of Concentration In Non-Urbanized Basins <br />3.4.2 Time of Concentration In Urbanized Basins <br />3.5 Intensity <br />3.6 Runoff Coefficient <br />3.7 Application of the Rational Method <br />3.8 Major Storm Analysis <br />3.9 Use of Rational Method For Detention Design <br /> <br />4. COLORADO URBAN HYDROGRAPH PROCEDURE - 1982 Version <br /> <br />. <br /> <br />4.1 Defi nition <br />4.2 Basic Assumptions <br />4.3 Equations <br />4.4 Unit Storm Duraton <br />4.5 Basin Size Limits <br />4.6 Basin Shape Limits and Considerations <br />4.7 Basin Slope Limit and Considerations <br />4.8 Basin Land Use Considerations <br />4.9 Determination of Ct and Cp Coefficients <br />4.10 Unit Hydrograph Shape <br />4.11 Calculating a Hydrograph <br />4.12 Example - One Homogeneous Basin Hydrograph <br />4.13 Channel Routing of Hydrographs <br />4.13.1 Direct Translation <br />4.13.2 Example - Direct Translation Channel Routing <br />4.13.3 Convex Method <br />4.13.4 Example - Convex Routing Method <br />4.13.5 Comparison of Routing Examples <br />4.14 Basis for 1982 Version of CUHP <br />4.15 Work Sheets For CUHP and Channel Routing <br /> <br />5-1-84 <br />