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 AK-1 1 ( NA ) STRIP NUMBER = 4 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 1.37 (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 .19 .380 .380 2.000 .004 2 .50 .430 .810 .860 .028 3 .50 .240 1.050 .480 .048 4 .18 .020 1.070 .111 .014 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 1.37 1.070 C1 = .695 C2 = .305 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 1.070 2.972 1.486 1.033 .000 1.0335 .2 .000 .000 1.486 1.033 .315 1.3483 .3 .000 .000 .000 .000 .411 .4107 .4 .000 .000 .000 .000 .125 .1251 .5 .000 .000 .000 .000 .038 .0381 .6 .000 .000 .000 .000 .012 .0116 .7 .000 .000 .000 .000 .004 .0035 .8 .000 .000 .000 .000 .001 .0011 .9 .000 .000 .000 .000 .000 .0003 1.0 .000 .000 .000 .000 .000 .0001 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 = 1.07SQ.KM BASIN LENGTH = 1.37KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .33 .40 .41 .44 .47 .49 .2 1.60 1.93 2.00 2.15 2.29 2.36 .3 4.60 5.56 5.77 6.19 6.60 6.79 .4 9.57 11.56 11.99 12.86 13.73 14.12 .5 14.63 17.68 18.33 19.66 20.98 21.58 .6 16.82 20.33 21.07 22.61 24.13 24.81 .7 17.04 20.60 21.35 22.91 24.45 25.14 .8 16.92 20.45 21.20 22.75 24.27 24.96 .9 16.93 20.46 21.21 22.76 24.29 24.98 1.0 11.25 13.60 14.10 15.13 16.14 16.60 1.1 3.43 4.14 4.30 4.61 4.92 5.06 1.2 1.04 1.26 1.31 1.40 1.50 1.54 1.3 .32 .38 .40 .43 .46 .47 1.4 .10 .12 .12 .13 .14 .14 1.5 .03 .04 .04 .04 .04 .04 1.6 .01 .01 .01 .01 .01 .01 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 56.95 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 AK-2 1 ( NA ) STRIP NUMBER = 5 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 2.16 (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 .19 .380 .380 2.000 .004 2 .50 .430 .810 .860 .028 3 .50 .240 1.050 .480 .048 4 .50 .200 1.250 .400 .073 5 .47 .090 1.340 .191 .043 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 1.33 1.106 .2 2.16 .234 C1 = .407 C2 = .593 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 1.106 3.073 1.536 .626 .000 .6255 .2 .234 .650 1.861 .758 .371 1.1286 .3 .000 .000 .325 .132 .669 .8014 .4 .000 .000 .000 .000 .475 .4751 .5 .000 .000 .000 .000 .282 .2817 .6 .000 .000 .000 .000 .167 .1670 .7 .000 .000 .000 .000 .099 .0990 .8 .000 .000 .000 .000 .059 .0587 .9 .000 .000 .000 .000 .035 .0348 1.0 .000 .000 .000 .000 .021 .0206 1.1 .000 .000 .000 .000 .012 .0122 1.2 .000 .000 .000 .000 .007 .0073 1.3 .000 .000 .000 .000 .004 .0043 1.4 .000 .000 .000 .000 .003 .0025 1.5 .000 .000 .000 .000 .002 .0015 1.6 .000 .000 .000 .000 .001 .0009 1.7 .000 .000 .000 .000 .001 .0005 1.8 .000 .000 .000 .000 .000 .0003 1.9 .000 .000 .000 .000 .000 .0002 2.0 .000 .000 .000 .000 .000 .0001 2.1 .000 .000 .000 .000 .000 .0001 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 = 1.34SQ.KM BASIN LENGTH = 2.16KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .20 .24 .25 .27 .28 .29 .2 1.05 1.27 1.32 1.41 1.51 1.55 .3 3.27 3.95 4.10 4.40 4.69 4.83 .4 7.34 8.87 9.19 9.87 10.53 10.83 .5 12.38 14.96 15.51 16.64 17.76 18.26 .6 16.20 19.58 20.30 21.79 23.25 23.91 .7 18.29 22.10 22.92 24.59 26.24 26.98 .8 19.35 23.39 24.25 26.02 27.77 28.55 .9 19.99 24.16 25.05 26.88 28.68 29.49 1.0 16.98 20.52 21.28 22.83 24.36 25.05 1.1 10.84 13.10 13.58 14.57 15.55 15.99 1.2 6.42 7.76 8.05 8.64 9.22 9.48 1.3 3.81 4.60 4.77 5.12 5.46 5.62 1.4 2.26 2.73 2.83 3.04 3.24 3.33 1.5 1.34 1.62 1.68 1.80 1.92 1.98 1.6 .79 .96 .99 1.07 1.14 1.17 1.7 .47 .57 .59 .63 .68 .69 1.8 .28 .34 .35 .38 .40 .41 1.9 .17 .20 .21 .22 .24 .24 2.0 .10 .12 .12 .13 .14 .14 2.1 .06 .07 .07 .08 .08 .09 2.2 .03 .04 .04 .05 .05 .05 2.3 .02 .02 .03 .03 .03 .03 2.4 .01 .01 .02 .02 .02 .02 2.5 .01 .01 .01 .01 .01 .01 2.6 .00 .01 .01 .01 .01 .01 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 56.95 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 AK-3 1 ( NA ) STRIP NUMBER = 5 ( DT ) UNIT TIME OF UNIT-GRAPH(HOUR) = .10 ( XL ) BASIN-LENGTH(KM) = 2.19 (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 .19 .380 .380 2.000 .004 2 .50 .470 .850 .940 .028 3 .50 .430 1.280 .860 .048 4 .50 .410 1.690 .820 .073 5 .50 .160 1.850 .320 .110 1 CONCENTRATED LENGTH AND AREA TIME LENGTH AREA (HOUR) (KM) (SQ.KM) .1 1.33 1.395 .2 1.91 .365 .3 2.19 .091 C1 = .320 C2 = .680 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 1.395 3.875 1.938 .621 .000 .6205 .2 .365 1.013 2.444 .783 .422 1.2044 .3 .091 .252 .632 .202 .819 1.0211 .4 .000 .000 .126 .040 .694 .7344 .5 .000 .000 .000 .000 .499 .4992 .6 .000 .000 .000 .000 .339 .3393 .7 .000 .000 .000 .000 .231 .2307 .8 .000 .000 .000 .000 .157 .1568 .9 .000 .000 .000 .000 .107 .1066 1.0 .000 .000 .000 .000 .072 .0724 1.1 .000 .000 .000 .000 .049 .0492 1.2 .000 .000 .000 .000 .033 .0335 1.3 .000 .000 .000 .000 .023 .0228 1.4 .000 .000 .000 .000 .015 .0155 1.5 .000 .000 .000 .000 .011 .0105 1.6 .000 .000 .000 .000 .007 .0071 1.7 .000 .000 .000 .000 .005 .0049 1.8 .000 .000 .000 .000 .003 .0033 1.9 .000 .000 .000 .000 .002 .0022 2.0 .000 .000 .000 .000 .002 .0015 2.1 .000 .000 .000 .000 .001 .0010 2.2 .000 .000 .000 .000 .001 .0007 2.3 .000 .000 .000 .000 .000 .0005 2.4 .000 .000 .000 .000 .000 .0003 2.5 .000 .000 .000 .000 .000 .0002 2.6 .000 .000 .000 .000 .000 .0002 2.7 .000 .000 .000 .000 .000 .0001 2.8 .000 .000 .000 .000 .000 .0001 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 = 1.85SQ.KM BASIN LENGTH = 2.19KM TIME 5-YR 10-YR 20-YR 30-YR 50-YR 80-YR .1 .20 .24 .25 .26 .28 .29 .2 1.07 1.29 1.34 1.44 1.54 1.58 .3 3.41 4.12 4.27 4.59 4.89 5.03 .4 7.85 9.49 9.84 10.56 11.27 11.59 .5 13.70 16.56 17.17 18.42 19.65 20.21 .6 18.77 22.68 23.52 25.23 26.92 27.69 .7 22.19 26.81 27.80 29.83 31.83 32.73 .8 24.35 29.43 30.51 32.74 34.94 35.93 .9 25.81 31.19 32.34 34.70 37.02 38.07 1.0 23.43 28.32 29.36 31.50 33.61 34.56 1.1 17.32 20.94 21.71 23.29 24.85 25.56 1.2 12.01 14.51 15.05 16.15 17.23 17.72 1.3 8.16 9.87 10.23 10.98 11.71 12.04 1.4 5.55 6.71 6.95 7.46 7.96 8.19 1.5 3.77 4.56 4.73 5.07 5.41 5.56 1.6 2.56 3.10 3.21 3.45 3.68 3.78 1.7 1.74 2.11 2.18 2.34 2.50 2.57 1.8 1.18 1.43 1.48 1.59 1.70 1.75 1.9 .81 .97 1.01 1.08 1.16 1.19 2.0 .55 .66 .69 .74 .79 .81 2.1 .37 .45 .47 .50 .53 .55 2.2 .25 .31 .32 .34 .36 .37 2.3 .17 .21 .22 .23 .25 .25 2.4 .12 .14 .15 .16 .17 .17 2.5 .08 .10 .10 .11 .11 .12 2.6 .05 .07 .07 .07 .08 .08 2.7 .04 .04 .05 .05 .05 .05 2.8 .02 .03 .03 .03 .04 .04 2.9 .02 .02 .02 .02 .02 .03 3.0 .01 .01 .01 .02 .02 .02 3.1 .01 .01 .01 .01 .01 .01 3.2 .01 .01 .01 .01 .01 .01 3.3 .00 .00 .00 .00 .01 .01 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