clc //initialisation of variables d=750000//gpd per sq mile v=0.22//ft a=1.27//ft q=0.30//ft d1=365//days p=0.25//ft //CALCULATIONS Q=q*a*d1//mg/sq mile H=p*a*d1//mg/sq mile //RESULTS printf('the results obtained by normal analytical procedures and by Hazen s=% f mg/sq mile',H)