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<br /> <br />DRAINAGE CRITERIA MANUAL <br /> <br />RUNOFF <br /> <br />. <br /> <br />1000 <br /> TIME Q TIME Q <br /> UNIT RAINFAll = 1 INCH 0 <br /> I 0 55 88 <br /> 5 115 60 70 <br /> lu = 5.0 MINUTES <br /> 800 10 345 65 55 <br /> lp lp = 13.5 MINUTES 15 528 70 40 <br /> I 20 463 75 30 <br /> ~ Tp = 16.0 MINUTES <br /> 25 350 80 20 <br /> 30 260 85 15 <br />_600 35 210 90 8 <br />'" 40 168 95 2 <br />- <br />" = 530 cIs 45 138 100 0 <br />- <br />~ 50 110 <br />0 <br />..J <br />LL 400 <br />. I:~ii r. (1) = 5.0 MINUTES <br /> (2) = 7.4 MINUTES <br /> w 50 <br /> 21.0 MIN. <br /> 200 <br /> ASSUMED SHAPE = 17.2 AC. FT. <br /> I I <br /> ADJUSTED SHAPE = 20.3 AC.FT. <br /> ""- <br /> 0 <br /> 0 20 40 60 80 100 120 <br /> TIME (MINUTES) <br /> <br /> <br /> <br /> <br /> <br />FIGURE 4 - 6. <br /> <br />EXAMPLE OF UNIT HYDROGRAPH SHAPING <br /> <br />. <br /> <br />5 ~1-84 <br />URBAN DRAINAGE & FLOOD CONTROL DISTRICT <br />