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
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.0 * .0 .0 .0 .0 .0 .0 .0 .0 .0 .0
1.0 * .0 .0 .0 .0 .0 .0 .0 .0 .1 .2
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2.0 * .2 .3 .4 .5 .6 .7 .8 .9 1.0 1.1
3.0 * 1.2 1.4 1.6 2.0 3.0 4.5 6.2 9.5 17.5 29.9
4.0 * 42.7 53.1 44.5 26.8 22.5 21.6 20.6 19.5 18.5 17.3
5.0 * 16.2 15.0 13.8 12.5 11.3 10.0 9.0 8.1 7.5 7.3
6.0 * 7.1 6.7 6.0 5.1 4.7 4.5 4.3 4.0 3.8 3.7
7.0 * 3.5 3.4 3.2 3.1 3.0 3.0 2.9 2.8 2.8 2.8
8.0 * 2.8 2.6 2.1 1.4 1.2 1.0 .9 .7 .6 .5
9.0 * .4 .3 .2 .2 .1 .1 .0
INITIAL ABSTRACTION = 21.77 mm.
ROUTED FLAW TIME FROM THE SUBWATERSHED = .00 hours.
TIME TO PEAK OF UNIT HYDROGRAPH = .20 hours.
THE DEPTH OF WATER ON WATERSHED = 2 51.57 mm.
VOLUME OF RUNOFF = 2 07.51 thousand cu.m.
PEAK RUNOFF RATE = 53.10 cu. m./sec.
TIME TO PEAK RUNOFF = 4.10 hours.

THERE IS NO SEDIMENT CONTAINED IN THE STORM RUNOFF FROM THIS

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