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Hydrology - NCTCOG

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.

• Characteristics of the local drainage system There are a number of empirical hydrologic methods available to estimate runoff characteristics for a site or drainage subbasin; however, the following methods have been selected to support hydrologic site analysis for the design methods and procedures included in this Manual: • Rational Method

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