GEM 4409 Hydrology Fall 2005 TROY UNIVERSITY.

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GEM 4409 Hydrology Fall 2005 TROY UNIVERSITY

Hydrologic Cycle

Estimating Runoff 1. Drainage Basin Characteristics 2. Stream Channel Characteristics 3. Flood Plain Characteristics 4. Weather Characteristics Size Shape Slope Land Use Geology Soil Type Storage Capability Precipitation Type Precipitation Amount Storm Size Storm Direction Storm Intensity

Selection of Methodology 1. Small Drainage Basins Rational Method (Q = CIA) 2. Midsize Drainage Basins USGS Regression Equations SCS Curve Number Methods Hydrographs TR-55 Method 3. Large Drainage Basins