1 RETURN INTENSITY PERIOD RAINFALL 5 56.95 10 68.83 20 71.36 30 76.57 50 81.70 80 84.02 1 RAINFALL HYETOGRAPH TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .42 .50 .52 .56 .60 .61 .2 1.46 1.77 1.83 1.97 2.10 2.16 .3 3.71 4.48 4.65 4.98 5.32 5.47 .4 6.55 7.92 8.21 8.81 9.40 9.67 .5 8.16 9.86 10.23 10.97 11.71 12.04 .6 7.38 8.91 9.24 9.92 10.58 10.88 .7 7.60 9.19 9.53 10.22 10.91 11.22 .8 7.14 8.62 8.94 9.59 10.24 10.53 .9 7.66 9.26 9.60 10.30 10.99 11.30 1.0 6.87 8.31 8.61 9.24 9.86 10.14 1 SK-1 1 ( NA ) STRIP NUMBER = 3 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 1.08 (COFF) RUNOFF COEFFICIENT = .76 (BET ) INITIAL CONCENTRATION TIME = .00 ZONING LENGTH AREA(I) ACCUMU. WIDTH TIME NUMBER (KM) (SQ.KM) AREA(I) (KM) (HR) 1 .08 .140 .140 1.750 .002 2 .50 .240 .380 .480 .019 3 .50 .030 .410 .060 .048 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 1.08 .410 C1 = .839 C2 = .161 1 AREA-ROUTING UNIT-HYDROGRAPH TIME AREA I=2.7780 (I1 + I2)/2 C1 * (1) C2 * (4) (2) + (3) (HR.) (KM**2) * AREA = (1) = (2) = (3) = (4) .1 .410 1.139 .569 .478 .000 .4780 .2 .000 .000 .569 .478 .077 .5548 .3 .000 .000 .000 .000 .089 .0891 .4 .000 .000 .000 .000 .014 .0143 .5 .000 .000 .000 .000 .002 .0023 .6 .000 .000 .000 .000 .000 .0004 .7 .000 .000 .000 .000 .000 .0001 .8 .000 .000 .000 .000 .000 .0000 .9 .000 .000 .000 .000 .000 .0000 1.0 .000 .000 .000 .000 .000 .0000 1.1 .000 .000 .000 .000 .000 .0000 1.2 .000 .000 .000 .000 .000 .0000 1.3 .000 .000 .000 .000 .000 .0000 1.4 .000 .000 .000 .000 .000 .0000 1.5 .000 .000 .000 .000 .000 .0000 1.6 .000 .000 .000 .000 .000 .0000 1.7 .000 .000 .000 .000 .000 .0000 1.8 .000 .000 .000 .000 .000 .0000 1.9 .000 .000 .000 .000 .000 .0000 2.0 .000 .000 .000 .000 .000 .0000 2.1 .000 .000 .000 .000 .000 .0000 2.2 .000 .000 .000 .000 .000 .0000 2.3 .000 .000 .000 .000 .000 .0000 2.4 .000 .000 .000 .000 .000 .0000 2.5 .000 .000 .000 .000 .000 .0000 2.6 .000 .000 .000 .000 .000 .0000 2.7 .000 .000 .000 .000 .000 .0000 2.8 .000 .000 .000 .000 .000 .0000 2.9 .000 .000 .000 .000 .000 .0000 3.0 .000 .000 .000 .000 .000 .0000 3.1 .000 .000 .000 .000 .000 .0000 3.2 .000 .000 .000 .000 .000 .0000 3.3 .000 .000 .000 .000 .000 .0000 3.4 .000 .000 .000 .000 .000 .0000 3.5 .000 .000 .000 .000 .000 .0000 3.6 .000 .000 .000 .000 .000 .0000 3.7 .000 .000 .000 .000 .000 .0000 3.8 .000 .000 .000 .000 .000 .0000 3.9 .000 .000 .000 .000 .000 .0000 4.0 .000 .000 .000 .000 .000 .0000 4.1 .000 .000 .000 .000 .000 .0000 4.2 .000 .000 .000 .000 .000 .0000 4.3 .000 .000 .000 .000 .000 .0000 4.4 .000 .000 .000 .000 .000 .0000 4.5 .000 .000 .000 .000 .000 .0000 4.6 .000 .000 .000 .000 .000 .0000 4.7 .000 .000 .000 .000 .000 .0000 4.8 .000 .000 .000 .000 .000 .0000 4.9 .000 .000 .000 .000 .000 .0000 5.0 .000 .000 .000 .000 .000 .0000 1 FLOOD HYDROGRAPH BY AREA-ROUTING UNIT-HYDROGRAPH METHOD BASIN AREA = .41SQ.KM BASIN LENGTH = 1.08KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .15 .18 .19 .20 .22 .22 .2 .71 .85 .89 .95 1.01 1.04 .3 1.99 2.41 2.50 2.68 2.86 2.94 .4 4.05 4.89 5.07 5.44 5.81 5.97 .5 6.00 7.25 7.51 8.06 8.60 8.85 .6 6.61 7.99 8.28 8.88 9.48 9.75 .7 6.50 7.86 8.15 8.74 9.33 9.59 .8 6.40 7.73 8.02 8.60 9.18 9.44 .9 6.40 7.74 8.02 8.61 9.19 9.45 1.0 3.81 4.61 4.78 5.12 5.47 5.62 1.1 .61 .74 .77 .82 .88 .90 1.2 .10 .12 .12 .13 .14 .15 1.3 .02 .02 .02 .02 .02 .02 1.4 .00 .00 .00 .00 .00 .00 1.5 .00 .00 .00 .00 .00 .00 1.6 .00 .00 .00 .00 .00 .00 1.7 .00 .00 .00 .00 .00 .00 1.8 .00 .00 .00 .00 .00 .00 1.9 .00 .00 .00 .00 .00 .00 2.0 .00 .00 .00 .00 .00 .00 2.1 .00 .00 .00 .00 .00 .00 2.2 .00 .00 .00 .00 .00 .00 2.3 .00 .00 .00 .00 .00 .00 2.4 .00 .00 .00 .00 .00 .00 2.5 .00 .00 .00 .00 .00 .00 2.6 .00 .00 .00 .00 .00 .00 2.7 .00 .00 .00 .00 .00 .00 2.8 .00 .00 .00 .00 .00 .00 2.9 .00 .00 .00 .00 .00 .00 3.0 .00 .00 .00 .00 .00 .00 3.1 .00 .00 .00 .00 .00 .00 3.2 .00 .00 .00 .00 .00 .00 3.3 .00 .00 .00 .00 .00 .00 3.4 .00 .00 .00 .00 .00 .00 3.5 .00 .00 .00 .00 .00 .00 3.6 .00 .00 .00 .00 .00 .00 3.7 .00 .00 .00 .00 .00 .00 3.8 .00 .00 .00 .00 .00 .00 3.9 .00 .00 .00 .00 .00 .00 4.0 .00 .00 .00 .00 .00 .00 4.1 .00 .00 .00 .00 .00 .00 4.2 .00 .00 .00 .00 .00 .00 4.3 .00 .00 .00 .00 .00 .00 4.4 .00 .00 .00 .00 .00 .00 4.5 .00 .00 .00 .00 .00 .00 4.6 .00 .00 .00 .00 .00 .00 4.7 .00 .00 .00 .00 .00 .00 4.8 .00 .00 .00 .00 .00 .00 4.9 .00 .00 .00 .00 .00 .00 5.0 .00 .00 .00 .00 .00 .00