Laserfiche WebLink
65 <br />66 <br />67 <br />68 <br />69 <br />70 <br />71 <br />72 <br />73 <br />74 <br />75 <br />76 <br />77 <br />78 <br />79 <br />80 <br />81 <br />82 <br />83 <br />84 <br />85 <br />86 <br />87 <br />88 <br />89 <br />90 <br />91 <br />92 <br />93 <br />94 <br />95 <br />96 <br />97 <br />98 <br />99 <br />100 <br />101 <br />102 <br />103 <br />104 <br />105 <br />106 <br />107 <br />108 <br />109 <br />110 <br />111 <br />112 <br />113 <br />114 <br />115 <br />116 <br />117 <br />118 <br />119 <br />120 <br />121 <br />122 <br />123 <br />124 <br />125 <br />126 <br />127 <br />128 <br />+ + <br />DA-D1 <br />+ + <br />++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br />FLOW PROCESS FROM NODE 400.00 TO NODE 401.00 IS CODE = 21 <br />---------------------------------------------------------------------------- <br />»»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS««< <br />>>USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< <br />INITIAL SUBAREA FLOW-LENGTH(FEET) = 100.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 156.00 DOWNSTREAM(FEET) = 154.00 <br />Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = <br />5.000 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) <br />= <br />6.187 <br />SUBAREA Tc AND LOSS RATE <br />DATA(AMC II): <br />DEVELOPMENT TYPE/ <br />SCS SOIL AREA <br />Fp <br />Ap SCS <br />Tc <br />LAND USE <br />GROUP (ACRES) <br />(INCH/HR) <br />(DECIMAL) CN <br />(MIN.) <br />COMMERCIAL <br />B 2.42 <br />0.30 <br />0.100 56 <br />5.00 <br />SUBAREA AVERAGE PERVIOUS <br />LOSS RATE, Fp(INCH/HR) <br />= 0.30 <br />SUBAREA AVERAGE PERVIOUS <br />AREA FRACTION, Ap <br />= 0.100 <br />SUBAREA RUNOFF(CFS) = <br />13.41 <br />TOTAL AREA(ACRES) = <br />2.42 PEAK FLOW <br />RATE(CFS) <br />= 13.41 <br />++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br />FLOW PROCESS FROM NODE 401.00 TO NODE 440.00 IS CODE = 31 <br />---------------------------------------------------------------------------- <br />»»>COMPUTE PIPE -FLOW TRAVEL TIME THOU SUBAREA««< <br />»»>USING COMPUTER -ESTIMATED PIPESIZE (NON -PRESSURE FLOW) ««< <br />ELEVATION DATA: UPSTREAM(FEET) = 146.70 DOWNSTREAM(FEET) _ <br />FLOW LENGTH(FEET) = 860.00 MANNING'S N = 0.013 <br />DEPTH OF FLOW IN 21.0 INCH PIPE IS 13.8 INCHES <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 7.98 <br />ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = <br />PIPE-FLOW(CFS) = 13.41 <br />PIPE TRAVEL TIME(MIN.) = 1.80 Tc(MIN.) = 6.80 <br />LONGEST FLOWPATH FROM NODE 400.00 TO NODE 440.00 = <br />135.80 <br />1 <br />960.00 FEET. <br />++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br />FLOW PROCESS FROM NODE 440.00 TO NODE 440.00 IS CODE = 1 <br />---------------------------------------------------------------------------- <br />»»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br />TOTAL NUMBER OF STREAMS = 4 <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: <br />TIME OF CONCENTRATION(MIN.) = 6.80 <br />RAINFALL INTENSITY(INCH/HR) = 5.19 <br />AREA -AVERAGED Fm(INCH/HR) = 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 <br />AREA -AVERAGED Ap = 0.10 <br />EFFECTIVE STREAM AREA(ACRES) = 2.42 <br />TOTAL STREAM AREA(ACRES) = 2.42 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE = 13.41 <br />+ + <br />DA-D2 <br />+ + <br />