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 .3 .4'
•
2.0 * .6 .8 1.0 1.2 1.4 1.5 1.7 1.9 2.1 2.3
3.0 * 2.4 2.7 3.3 4.1 7.1 10.3 15.3 22.0 47.3 75.2
4.0 * 111.0 133.8 88.9 41.0 21.6 16.4 15.0 14.5 14.1 13.9
5.0 * 13.5 13.2 12.9 12.6 12.2 12.0 11.6 11.3 10.9 10.6
6.0 * 10.3 9.8 7.7 5.8 5.1 4.9 4.8 4.8 4.7 4.7
7.0 * 4.6 4.6 4.6 4.5 4.5 4.5 4.4 4.4 4.3 4.3
8.0 * 4.3 4.1 2.3 .8 .2
INITIAL ABSTRACTION = 21.77 mm.
ROUTED FLOW TIME FROM THE SUBWATERSHED = .65 hours.
TIME TO PEAK OF UNIT HYDROGRAPH = .16 hours.
THE DEPTH OF WATER ON WATERSHED = 249.27 mm.
VOLUME OF RUNOFF = 329.15 thousand cu.m.
PEAK RU NOFF RATE = 133.81 au. m./sec.
TIME TO PEAK RUNOFF = 4.10 hours.

THERE IS NO SEDIMENT CONTAINED IN THE STORM RUNOFF FROM 'THIS WATERSHED

r 1
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