1 RETURN INTENSITY PERIOD RAINFALL 5 56.42 10 65.34 20 71.80 30 76.64 50 82.51 80 87.92 1 RAINFALL HYETOGRAPH TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .41 .48 .52 .56 .60 .64 .2 1.45 1.68 1.85 1.97 2.12 2.26 .3 3.67 4.25 4.67 4.99 5.37 5.72 .4 6.49 7.52 8.26 8.82 9.50 10.12 .5 8.08 9.36 10.29 10.98 11.82 12.60 .6 7.31 8.46 9.30 9.92 10.69 11.39 .7 7.53 8.72 9.59 10.23 11.02 11.74 .8 7.07 8.19 9.00 9.60 10.34 11.02 .9 7.59 8.79 9.66 10.31 11.10 11.83 1.0 6.81 7.89 8.67 9.25 9.96 10.61 1 AS-1 1 ( NA ) STRIP NUMBER = 3 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 1.50 (COFF) RUNOFF COEFFICIENT = .77 (BET ) INITIAL CONCENTRATION TIME = .00 ZONING LENGTH AREA(I) ACCUMU. WIDTH TIME NUMBER (KM) (SQ.KM) AREA(I) (KM) (HR) 1 .50 .150 .150 .300 .036 2 .50 .400 .550 .798 .073 3 .50 .180 .730 .360 .032 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 .94 .501 .2 1.50 .229 C1 = .525 C2 = .475 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 .501 1.392 .696 .365 .000 .3652 .2 .229 .636 1.014 .532 .174 .7057 .3 .000 .000 .318 .167 .335 .5023 .4 .000 .000 .000 .000 .239 .2387 .5 .000 .000 .000 .000 .113 .1134 .6 .000 .000 .000 .000 .054 .0539 .7 .000 .000 .000 .000 .026 .0256 .8 .000 .000 .000 .000 .012 .0122 .9 .000 .000 .000 .000 .006 .0058 1.0 .000 .000 .000 .000 .003 .0027 1.1 .000 .000 .000 .000 .001 .0013 1.2 .000 .000 .000 .000 .001 .0006 1.3 .000 .000 .000 .000 .000 .0003 1.4 .000 .000 .000 .000 .000 .0001 1.5 .000 .000 .000 .000 .000 .0001 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 = .73SQ.KM BASIN LENGTH = 1.50KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .12 .13 .15 .16 .17 .18 .2 .63 .73 .80 .86 .92 .98 .3 1.98 2.29 2.52 2.69 2.90 3.09 .4 4.46 5.16 5.67 6.06 6.52 6.95 .5 7.53 8.71 9.58 10.22 11.00 11.73 .6 9.78 11.32 12.44 13.28 14.30 15.24 .7 10.80 12.50 13.74 14.67 15.79 16.83 .8 11.14 12.91 14.18 15.14 16.30 17.37 .9 11.29 13.08 14.37 15.34 16.52 17.60 1.0 9.39 10.87 11.94 12.75 13.73 14.63 1.1 5.44 6.29 6.92 7.38 7.95 8.47 1.2 2.58 2.99 3.29 3.51 3.78 4.02 1.3 1.23 1.42 1.56 1.67 1.79 1.91 1.4 .58 .68 .74 .79 .85 .91 1.5 .28 .32 .35 .38 .41 .43 1.6 .13 .15 .17 .18 .19 .21 1.7 .06 .07 .08 .08 .09 .10 1.8 .03 .03 .04 .04 .04 .05 1.9 .01 .02 .02 .02 .02 .02 2.0 .01 .01 .01 .01 .01 .01 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