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+

+

+//example 4.38

+//calculate peak rate of run off

+clc;funcprot(0);

+//given

+C1=0.22;C2=0.12;C3=0.32;     //run-off coefficient

+A1=3.2;A2=4.8;A3=1.8;       //calculated area

+L=2.4;                      //length of water course

+H=30;                       //fall

+T=30;                       //frequency

+t=60*0.000323*(L*1000)^0.77*(H/(L*1000))^(-0.385);

+i=78*T^0.22/(t+12)^0.45;

+q=2.778*i*(C1*A1+C2*A2+C3*A3);

+q=round(q*10)/10;

+mprintf("peak rate of run off=%f cumecs.",q);