1. GEM 4409 Hydrology Fall 2005
TROY
UNIVERSITY

2. Hydrologic Cycle

3. 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

4. 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