PERMFILE113314

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 7/30/2007
• Doc Name: Collection/Diversion Ditches and Culverts Design Parameters
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-1
• Media Type: D
• Archive: Yes

• 2. Frequency ........................yr = 10
3. Rainfall,P(24-hour) ..............in = 2.00
4. Initial abstraction, la............ = 0.4691
5. Compute la/P ....................... = 0.2346
6. Unit peak discharge, qu......csm/in = 405.21
7. Runoff,Q .........................in = 0.6045
8. Pond & swap adjustment factor,...Fp = 0.87
9. Peak Discharge,gp ...............cfs = 33.0340
• DITCH C-4
Channel Type: Trapezoidal, Equal Side Slopes
Dimensions: Left Side Slope 2.00:1
Right Side Slope 2.00:1
Base Dimension: 10.00
Wetted Perimeter: 12.10
Area of Wetted Cross Section: 5.15
Discharge: 33.00 cfs
Depth of Flow: 0.47 feet
Velocity: 6.41 fps
Freeboard: 0.28 feet
• REVISED MARCH 2006 Attachment 2.05.3(3)-1-14