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DRAFT TABLE 2.6 - SCS TYPE-II STORM DISTRIBUTION ---------------------------------------------------------------- TIME % TIME % TIME % TIME % (HH:MM) RAINFALL RAINFALL RAINFALL RAINFALL ---------------------------------------------------------------- 0:15 0.26 6:15 0.44 12:15 31. 92 18:15 0.43 0:30 0.27 6:30 0.46 12:30 5.88 18:30 0.42 0:45 0.27 6:45 0:48 12:45 0.81 18:45 0.41 1:00 0.28 7:00 0.49 13:00 0.77 19:00 0.39 1:15 0.28 7:15 0.52 13:15 0.76 19:15 0.38 1:30 0.28 7:30 0.53 13:30 0.75 19:30 0.37 1:45 0.29 7:45 0.56 13:45 0.74 19:45 0.37 2:00 0.30 8:00 0.59 14:00 0.73 20:00 0.36 2:15 0.30 8:15 0.62 14:15 0.72 20:15 0.35 2:30 0.31 8:30 0.64 14:30 0.71 20:30 0.34 2:45 0.31 8:45 0.67 14:45 0.70 20:45 0.33 3:00 0.32 9:00 0.69 15:00 0.70 21:00 0.32 3:15 0.33 9:15 0.70 15:15 0.69 21:15 0.32 3:30 0.33 9:30 0.70 15:30 0.68 21:30 0.31 3:45 0.34 9:45 0.71 15:45 0.64 21:45 0.30 4:00 0.35 10:00 0.72 16:00 0.61 22:00 0.30 4:15 0.36 10:15 0.73 16:15 0.58 22:15 0.29 4:30 0.37 10:30 0.74 16:30 0.56 22:30 0.28 4:45 0.38 10:45 0.75 16:45 0.53 22:45 0.28 5:00 0.39 11:00 0.76 17:00 0.51 23:00 0.27 5:15 0.40 11:15 0.77 17:15 0.49 23:15 0.27 5:30 0.41 11:30 0.80 17:30 0.47 23:30 0.27 5:45 0.42 11:45 5.88 17:45 0.46 23:45 0.27 6:00 0.43 12:00 12.32 18:00 0.45 24:00 0.26 ---------------------------------------------------------------- Rainfall Loss Parameters Rainfall losses were based on the curve number methodology developed by the SCS. The soils mapped within the Master Plan Area are grouped into the SCS hydrologic types B or C, with the predominent type being Group B. Initially each unit was assigned a curve number based on a wighted average of the present soil types and land use/cover classification. The values to develop the weighted CN numbers were: TABLE 2.7 - INITIAL CURVE NUMBERS BASED ON SOIL GROUP AND LAND USE/COVER SOIL GROUP FOREST MEADOW/ALPINE PARK/GOLF COURSE B C 55 70 58 71 61 74 13