1989-10-10_REVISION - M1988112 ‎(7)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 10/10/1989
• Doc Name: APPENDIX H DIVERSION DITCH DESIGN CALCULATIONS
• Type & Sequence: AM1
• Media Type: D
• Archive: No

********** STORM HYDROGRAPH GENERATED FROM START OF RAINFALL ***********
TIME * 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
****************************************************************************
.0 * .0 .0 .0 .0 .0 .0 .0 .0 .0 .0
1.0 * .0 .0 .0 .0 .0 .0 .0 .1 .2 .3
2.0 * .4 .5 .5 .6 .7 .8 .9 1.0 1.0 1.1
3.0 * 1.2 1.5 1.9 3.0 5.0 6.8 9.6 19.2 36.7 50.1
4.0 * 67.8 48.6 10.6 7.2 6.9 6.8 6.6 6.5 6.3 6.2
5.0 * _
6.1 5.9 5.8 5.6 5.5 5.3 5.2 5.0 4.9 4.7
6.0 * 4.5 3.7 2.4 2.2 2.2 2.2 2.2 2.2 2.2 2.1
7.0 * 2.1 2.1 2.1 2.1 2.0 2.0 2.0 2.0 2.0 2.0
8.0 * 1.9 1.2
INITIAL ABSTRACTION = 21.77 mm.
ROUTED FLOW TIME FROM THE SUBWATERS HED = .65 hours.
TIME TO PEAK OF UNIT HYDROGRAPH = .OS hours.
THE DEPTH OF WATER ON WATERSHED = 2 52.69 mm.
VOLUME OF RUNOFF = 1 51.30 thousand cu.m.
PEAK RUNOFF RATE = 70.70 cu. m./sec.
TIME TO PEAK RUNOFF = 4.05 hours.
THERE IS NO SEDIMENT CONTAINED IN THE STORM RUNOFF FROM THIS WATERSHED
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