Hydrology Studio IDF File False 3 FHA Alpena Michigan, USA I = B/(Tc + D)^E) Equation Coefficients = B, D, E, n/a 1,6.670073,0,0.4740836,0 1,7.718957,0,0.4739204,0 1,0,0,0,0 1,9.399401,0,0.471619,0 1,10.9427,0,0.4743469,0 1,13.09027,0,0.4775023,0 1,14.78408,0,0.4789019,0 1,16.51914,0,0.4807537,0 Intermediate Intensity Values = 5-min, 15-min, 30-min, 60-min 3.11,1.85,1.33,0.852 3.6,2.14,1.54,0.986 0,0,0,0 4.4,2.62,1.89,1.21 5.1,3.04,2.18,1.4 6.07,3.61,2.58,1.67 6.84,4.07,2.9,1.89 7.62,4.54,3.22,2.11 25 100 50