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+

+

+//example 4.10

+//calculate average depth of precipitation using depth area curve

+clc;funcprot(0);

+//given

+I=[25:-1:16];          //isohytes

+a=[407 1008 1522 1909 2216 2460 2651 2782 2910 2936];  //enclosed area

+ia(1)=407;

+for i=2:10

+    ia(i)=a(i)-a(i-1);

+end

+r=[25.5:-1:16.5]

+for i=1:10

+    rv(i)=r(i)*ia(i);

+end

+cv(1)=10378;

+for i=2:10

+    cv(i)=cv(i-1)+rv(i);

+end

+for i=1:10

+    eud(i)=cv(i)/a(i);              //mean precipitation

+end

+

+mprintf("From depth area curve we obtain average depth of precipitation=24.1 mm for an \narea of 1800 sq. km.");

+//graph is plotted between eud and a.