芝加哥降雨过程线.xls

1r(雨峰系数)0.400T(总降雨历时min)120A2094.861C0.506b8.875n0.633 1.02.03.05.010.000.23770.27400.29510.32180.358010.24120.27800.29950.32650.363320.24480.28210.30390.33140.368730.24860.28640.30860.33650.374340.25250.29090.31340.34170.380250.25650.29560.31840.34720.386360.26070.30040.32370.35290.392670.26510.30550.32910.35890.399280.26970.31080.33480.36510.406290.27450.31630.34070.37160.4134100.27950.32210.34700.37830.4209110.28470.32810.35350.38540.4288120.29020.33440.36030.39290.4371130.29600.34110.36740.40070.4458140.30210.34810.37500.40890.4549150.30840.35540.38290.41750.4645160.31520.36320.39130.426604746170.32230.37140.40010.43630.4853180.32980.38000.40940.44640.4967190.33780.38920.41930.45720.5087200.34620.39900.42980.46870.5214210.35520.40940.44100.48090.5350220.36490.42040.45290.49390.5495230.37510.43230.46570.50780.5650240.38620.44500.47940.52270.5816250.39800.45860.49410.53880.5994260.41080.47340.51000.55610.6187270.42460.48930.52710.57480.6395280.43970.50660.54580.59510.6621290.45600.52550.56610.61730.6868300.47400.54620.58840.64160.7138310.49370.56890.61290.66830.7435320.51550.59400.64000.69780.7764330.53980.62200.67010.73070.8129340.56700.65330.70380.76750.8539350.59760.68860.74190.80900.9000360.63250.72880.78510.85610.9525370.67240.77490.83480.91031.0127380.71880.82830.89240.97311.0826390.77330.89110.96001.04681.1646400.83820.96581.04051.13461.2623410.91681.05641.13811.24101.3806421.01391.16841.25871.37261.5270431.13721.31041.41171.53941.7126441.29831.49611.61181.75751.9553451.51761.74881.88402.05442.2856461.83222.11122.27452.48012.7592472.31722.67022.87663.13673.4897483.14953.62933.90994.26354.7432492.54182.92903.15553.44083.8280502.12902.45332.64302.88203.2063511.83222.11122.27452.48012.7592521.60931.85441.99782.17852.4236531.43631.65511.78301.94432.1630541.29831.49611.61181.75751.9553551.18591.36651.47221.60531.7860561.09261.25901.35641.47901.6454571.01391.16841.25871.37261.5270580.94681.09101.17541.28161.4259590.88881.02411.10331.20311.3385600.83820.96581.04051.13461.2623610.79360.91450.98521.07431.1952Q=2094.861(1+0.506)(+8.875)0.633Q=(1+)(+)(/ha)167(1+)167(+)(/nP（重现期）t 降雨历时(min)i=(+)=(1+)1671(+)(/n)峰前：ib=(1)+(+)+1(/n)峰后：ia=(1)1+(1+)+1(/n)注：式、中tb,ta为降雨历时与雨峰时刻的时间间隔，以分钟计。上述公式及推导详见 周玉文 赵洪宾 所著排水管网理论与计算P115-116。1801601401201008060402000.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 降降雨雨历历时时t min降降雨雨强强度度 m mm m/m mi in nt=tb+ta=tr+t(1-r)=1历时td降雨总量:H=i=(+)(/n)dd=(1)+(+)+1(/n