TROY

1
GEM 4409HydrologyFall 2005

• TROY
• UNIVERSITY

2
Hydrologic Cycle
3
Estimating Runoff
1. Drainage Basin Characteristics 2.
Stream Channel Characteristics 3. Flood Plain
Characteristics 4. Weather Characteristics

• 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