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<br />step 1 - The basin and climate parameters for the two <br /> <br />regions are as follows: <br /> <br />. <br /> <br /> - Reduction <br /> Drainage Mean.Annual Fact<;!r.. <br /> Area, A Precipitation, P Fiqure 11 <br />Southern Plateau Region 5 sq mi 0.80 <br />Mountain Region 80 sq mi 30 in <br /> <br />step 2 - The 100-year flood characteristics Ior the <br />Mountain Region are defined by the following regression equations: <br /> <br />Discharge = QIOO = 1.88AMO.787pO.932 <br /> = 1.88(80)0.787(30)0.932 <br /> = 1,408 cis <br />Depth = QIOO = 1.44AO.187pO.059 <br />. = 1.44(80)0.187(30)0.059 <br /> = 4.0 ft <br /> <br />step 3 - The 100-year flood discharge for the Southern <br />Plateau Region is defined by the following regression equation: <br /> <br />QIOO = 103AspO.710 <br />= 103 (5)0.710 <br /> <br />= 323 cfs <br /> <br />Because the study site (elevation 6,700) is above <br />elevation 6,500 feet, the reduction factor determined from Figure 11, <br />page 31, is 0.80; and the adjusted discharge for the Southern Plateau <br />Region is <br /> <br />(0.80) (323) = 258 cis <br /> <br />. <br /> <br />15 <br />