Transcription of Hydrology - NCTCOG
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ISWMTM Technical Manual Hydrology Hydrology : Hydrological Analysis Downstream Assessment Streambank Protection Water Balance Rainfall Tables Hydrologic Soils DataiSWMTM Technical Manual Hydrology Hydrology HO-i April 2010, Revised 9/2014 Table of Contents Hydrological Analysis .. HO-1 Estimating HO-1 Introduction to Hydrologic Methods .. HO-1 Symbols and Definitions .. HO-4 Rainfall Estimation .. HO-5 Rational Method .. HO-7 Introduction .. HO-7 Application .. HO-7 Equations .. HO-7 Time of Concentration .. HO-8 Rainfall Intensity (I) .. HO-10 Runoff Coefficient (C) .. HO-10 Example Problem .. HO-10 SCS Hydrological Method .. HO-15 Introduction .. HO-15 Application .. HO-15 Equations and Concepts .. HO-15 Runoff Factor (CN) .. HO-17 Urban Modifications of the SCS Method .. HO-18 Travel Time Estimation .. HO-19 Simplified SCS Peak Runoff Rate Estimation .. HO-23 Example Problem 1 .. HO-25 hydrograph Generation.
Unit Hydrograph (SCS) 3 Any Size Method can be used for estimating peak flows and hydrographs for all design applications. Unit Hydrograph (Snyder’s) 4 1 acre and larger Method can be used for estimating peak flows and hydrographs for all design applications. TXDOT Regression Equations 210 to 100 mi Method can be used for
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