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 SR-1 1 ( NA ) STRIP NUMBER = 3 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = .98 (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 .15 .020 .020 .133 .003 2 .50 .270 .290 .540 .073 3 .07 .010 .300 .143 .003 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 .72 .300 C1 = .778 C2 = .222 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 .300 .833 .417 .324 .000 .3242 .2 .000 .000 .417 .324 .072 .3962 .3 .000 .000 .000 .000 .088 .0880 .4 .000 .000 .000 .000 .020 .0195 .5 .000 .000 .000 .000 .004 .0043 .6 .000 .000 .000 .000 .001 .0010 .7 .000 .000 .000 .000 .000 .0002 .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 = .30SQ.KM BASIN LENGTH = .98KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .10 .12 .13 .14 .15 .16 .2 .48 .56 .61 .65 .70 .75 .3 1.37 1.59 1.74 1.86 2.00 2.13 .4 2.81 3.25 3.57 3.82 4.11 4.38 .5 4.22 4.88 5.36 5.73 6.16 6.57 .6 4.73 5.48 6.02 6.42 6.91 7.37 .7 4.71 5.45 5.99 6.39 6.88 7.33 .8 4.64 5.38 5.91 6.31 6.79 7.23 .9 4.64 5.38 5.91 6.31 6.79 7.23 1.0 2.90 3.36 3.69 3.94 4.24 4.52 1.1 .64 .75 .82 .87 .94 1.00 1.2 .14 .17 .18 .19 .21 .22 1.3 .03 .04 .04 .04 .05 .05 1.4 .01 .01 .01 .01 .01 .01 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 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 SR-2 1 ( NA ) STRIP NUMBER = 4 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 1.63 (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 .13 .020 .020 .154 .003 2 .50 .390 .410 .778 .048 3 .50 .360 .770 .720 .029 4 .50 .230 1.000 .460 .033 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 1.43 .909 .2 1.63 .091 C1 = .614 C2 = .386 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 .909 2.524 1.262 .775 .000 .7747 .2 .091 .254 1.389 .853 .299 1.1517 .3 .000 .000 .127 .078 .445 .5227 .4 .000 .000 .000 .000 .202 .2019 .5 .000 .000 .000 .000 .078 .0780 .6 .000 .000 .000 .000 .030 .0301 .7 .000 .000 .000 .000 .012 .0116 .8 .000 .000 .000 .000 .004 .0045 .9 .000 .000 .000 .000 .002 .0017 1.0 .000 .000 .000 .000 .001 .0007 1.1 .000 .000 .000 .000 .000 .0003 1.2 .000 .000 .000 .000 .000 .0001 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 = 1.00SQ.KM BASIN LENGTH = 1.63KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .24 .28 .31 .33 .35 .38 .2 1.21 1.41 1.55 1.65 1.78 1.89 .3 3.60 4.16 4.58 4.88 5.26 5.60 .4 7.68 8.89 9.77 10.43 11.23 11.96 .5 12.15 14.07 15.46 16.50 17.77 18.93 .6 14.62 16.93 18.60 19.86 21.38 22.78 .7 15.29 17.71 19.46 20.77 22.36 23.83 .8 15.38 17.81 19.57 20.89 22.49 23.97 .9 15.43 17.87 19.64 20.97 22.57 24.05 1.0 11.30 13.08 14.38 15.34 16.52 17.60 1.1 4.81 5.57 6.12 6.54 7.04 7.50 1.2 1.86 2.15 2.37 2.52 2.72 2.90 1.3 .72 .83 .91 .98 1.05 1.12 1.4 .28 .32 .35 .38 .41 .43 1.5 .11 .12 .14 .15 .16 .17 1.6 .04 .05 .05 .06 .06 .06 1.7 .02 .02 .02 .02 .02 .02 1.8 .01 .01 .01 .01 .01 .01 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 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 SR-3 1 ( NA ) STRIP NUMBER = 7 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 3.13 (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 .13 .020 .020 .154 .003 2 .50 .390 .410 .778 .048 3 .50 .360 .770 .720 .029 4 .50 .340 1.110 .680 .033 5 .50 .330 1.440 .660 .038 6 .50 .270 1.710 .540 .048 7 .50 .090 1.800 .180 .048 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 1.43 .975 .2 2.65 .738 .3 3.13 .087 C1 = .338 C2 = .662 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 .975 2.709 1.354 .457 .000 .4572 .2 .738 2.050 2.379 .803 .303 1.1060 .3 .087 .241 1.146 .387 .733 1.1195 .4 .000 .000 .121 .041 .742 .7824 .5 .000 .000 .000 .000 .518 .5183 .6 .000 .000 .000 .000 .343 .3433 .7 .000 .000 .000 .000 .227 .2274 .8 .000 .000 .000 .000 .151 .1507 .9 .000 .000 .000 .000 .100 .0998 1.0 .000 .000 .000 .000 .066 .0661 1.1 .000 .000 .000 .000 .044 .0438 1.2 .000 .000 .000 .000 .029 .0290 1.3 .000 .000 .000 .000 .019 .0192 1.4 .000 .000 .000 .000 .013 .0127 1.5 .000 .000 .000 .000 .008 .0084 1.6 .000 .000 .000 .000 .006 .0056 1.7 .000 .000 .000 .000 .004 .0037 1.8 .000 .000 .000 .000 .002 .0025 1.9 .000 .000 .000 .000 .002 .0016 2.0 .000 .000 .000 .000 .001 .0011 2.1 .000 .000 .000 .000 .001 .0007 2.2 .000 .000 .000 .000 .000 .0005 2.3 .000 .000 .000 .000 .000 .0003 2.4 .000 .000 .000 .000 .000 .0002 2.5 .000 .000 .000 .000 .000 .0001 2.6 .000 .000 .000 .000 .000 .0001 2.7 .000 .000 .000 .000 .000 .0001 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 = 1.80SQ.KM BASIN LENGTH = 3.13KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .14 .17 .18 .19 .21 .22 .2 .85 .98 1.08 1.15 1.24 1.32 .3 2.85 3.30 3.62 3.87 4.16 4.43 .4 6.82 7.90 8.68 9.27 9.98 10.63 .5 12.42 14.38 15.80 16.87 18.16 19.35 .6 17.72 20.52 22.55 24.07 25.92 27.62 .7 21.39 24.78 27.23 29.06 31.29 33.34 .8 23.62 27.36 30.07 32.09 34.55 36.82 .9 25.04 29.00 31.87 34.02 36.62 39.02 1.0 23.53 27.25 29.95 31.97 34.42 36.67 1.1 18.04 20.89 22.96 24.50 26.38 28.11 1.2 12.19 14.11 15.51 16.55 17.82 18.99 1.3 8.07 9.35 10.27 10.97 11.80 12.58 1.4 5.35 6.19 6.81 7.26 7.82 8.33 1.5 3.54 4.10 4.51 4.81 5.18 5.52 1.6 2.35 2.72 2.99 3.19 3.43 3.66 1.7 1.55 1.80 1.98 2.11 2.27 2.42 1.8 1.03 1.19 1.31 1.40 1.51 1.60 1.9 .68 .79 .87 .93 1.00 1.06 2.0 .45 .52 .58 .61 .66 .70 2.1 .30 .35 .38 .41 .44 .47 2.2 .20 .23 .25 .27 .29 .31 2.3 .13 .15 .17 .18 .19 .20 2.4 .09 .10 .11 .12 .13 .14 2.5 .06 .07 .07 .08 .08 .09 2.6 .04 .04 .05 .05 .06 .06 2.7 .03 .03 .03 .03 .04 .04 2.8 .02 .02 .02 .02 .02 .03 2.9 .01 .01 .01 .02 .02 .02 3.0 .01 .01 .01 .01 .01 .01 3.1 .00 .01 .01 .01 .01 .01 3.2 .00 .00 .00 .00 .00 .01 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