暴雨产流计算(推理公式-四川省)

流域面积F河道长度L河道比降J暴雨频率Pkm2km实际值%θ流量系数mm修正系数K14026.470.01611530.470.811.00汇流参数Ⅰ地区东部地区点面系数Ⅰ1雨型双峰损失系数3编号Ⅱ径流系数5点雨量均值变差系数偏差系数模比系数点面系数面雨量设计值Ht(mm)CvCs/CvKPαtPtP10′180.353.51.670.98129.481h460.423.51.820.96880.933h600.453.51.880.939106.026h860.533.52.050.896158.1224h1100.553.52.090.979225.56SP产流历时tc全面汇流时间mm/hhτ1n（h）β0.1-10.36n0.1-10.4496.274299.35.61n120.5896.27328.06.04β1-60.67n1-60.7296.2758.56.57β6-240.70n6-240.7499.9449.46.58Ⅰ盆地丘陵区Ⅱ盆缘区Ⅲ川西南山区其它上限面积km225100300500Ⅰ124010.9860.950.921Ⅰ26010.940.8240.745Ⅱ111010.9490.870.827Ⅱ24010.910.7540.657汇流参数分区地区四川省汇流参数m与流域特征系数θ关系见下表。当J=0.0005～0.3可用下式计算其平均值m=0.2J－1/3，m范围为m=0.3～2.5。四川省分区不同流域面积F（km2）综合暴雨24h面深折减系数αt洪水特征及主要影响因素暴雨强度衰减指数造峰暴雨历时一般较短，层强度集中，植被较差，开垦度大，调蓄能力小，洪峰涨退快，基流较低造峰暴雨历时一般较长，时空分布较均匀，植被较好，水系河网发育，调洪作用大，洪峰涨快退慢，基流较高时段局地性强，造峰暴雨历时短，岩体破碎，土质疏松，透水性强，洪峰上尖下肥，基流较高金沙江洪水过程线计算参数推理公式法求暴雨径流洪峰流量（四川省水文手册）（二分法计算τ1n）查表或引用公式时集雨区对应分区编号Ⅲ1盆地腹部22010.9740.9190.879Ⅲ2长江河谷33010.9780.9440.912Ⅳ1乌江18010.970.9080.865Ⅳ2江北以下11010.9630.8780.824Ⅳ3江北以上27010.9750.9160.877Ⅳ47010.9380.8350.77Ⅴ1金沙江下段7010.9280.8320.771Ⅴ2雅砻江干流19010.9720.9090.861Ⅴ3德昌以上4010.8150.5390.423Ⅴ4德昌以下17010.9620.8750.81计算编号12310.840岷江、沱江中游及涪江、嘉陵江中下游盆地腹部丘陵地区20.88030.91540.78050.87060.91570.91580.88090.705100.805110.880120.730130.805计算值1234平均10.520.590.640.67Kθ盐源盆地区盐源盆地汇流参数修正系数K大小凉山及马边河一带沅江区大巴山暴雨区岷江上游区凉山区赤水河古蔺区分区名称安宁河区乌江下游及巫山区盆地腹部丘陵区岷沱江下游平行岭谷区长江南岸区米仓山、大巴山南坡嘉陵江、渠江中上游龙门山、茶坪山、邛崃山东南破及青衣江流域安宁河及渡口一带分区范围岷江、沱江下游及平行岭谷地区高县至綦江长江南岸地区赤水河古蔺地区秀山地区大渡河中下游区乌江下游及巫山地区岷江上游大渡河中下游根据实测资料的对应分析，μ值随集水面积的减小而增大。在四川其平均变化关系为：μ＝k·F－0.19，k值变化归纳如下:流域地形地貌盆地丘陵区青衣江～鹿头山暴雨区计算编号盆缘山区、川西南山地相对高差在200m以下，地势较平缓，植被较差，开垦度大，多为水平梯田相对高差在200m以上，地势较陡，切割较深，植被较好，有部分荒山或坡地地区青衣江～鹿头山暴雨区四川省小流域暴雨径流关系综合成果表α24计算值同上。土层较薄，石灰岩分布较普遍最大10.670.720.760.79最小10.380.460.520.56四川省小流域典型洪水概化过程线综合成果表流量Q历时tm3/shyxⅠⅡ7.300000052.50.850.050.10.050.20.1197.61.400.10.1650.10.260.15188.02.200.20.260.20.340.2368.74.060.40.480.40.40.245386.74.480.420.530.60.50.315368.74.900.40.580.80.620.4188.07.100.20.840.950.750.495124.78.460.13110.90.697.69.300.11.10.950.980.7188.010.150.21.20.81.090.815368.711.080.41.310.61.240.985549.411.460.61.3550.41.441.235730.111.920.81.410.21.791.64865.612.560.951.4850.12.12.1910.813.1111.550.052.382.58865.613.870.951.6403.13.85730.114.420.81.705549.415.180.61.795368.716.570.41.96188.019.490.22.30597.622.960.12.71552.526.690.053.15639.3204.65基流量Q0与F关系表Q0(m3/s)12.457.28Kx单峰东部地区y概化相对坐标地区岷江、大渡河、青衣江金沙江推求设计频率洪水过程线4.552.971.81长江上游干流区、乌江、沅江涪江、嘉陵江、渠江沱江损失系数μhP修正系数K参数m修正mm/hmmK6K24最小否1.41196.290.941QPm取值洪峰流量n取值SP取值tc取值m³/sQPm(m³/s)mm/hh903全面汇流9030.7499.9449.36全面汇流部分汇流14250.7296.2758.47设计洪水流量集水区域αt6αt24WP(万m3)Ⅰ0.9412748Ⅱ11Ⅲ11Q0(m3/s)Ⅳ11Ⅴ11部分汇流时间雨型历时Tτ2n（h）单峰洪水44.031.83日2.10双峰洪水61.922.58日4.08计算参数5.87东部地区单峰是5.99川西南地区双峰否m=0.40θ0.2040.803m=0.092θ0.636m=0.318θ0.2040.638m=0.055θ0.72m=0.221θ0.2040.444m=0.025θ0.8457001000上限面积km2251003000.8960.8714010.9760.9230.6980.6516010.930.8110.8020.7818010.9440.8510.5970.5464010.8950.715汇流参数四川省汇流参数m与流域特征系数θ关系见下表。当J=0.0005～0.3可用下式计算其平均值m=0.2J－1/3，m范围为m=0.3～2.5。汇流参数式θ=1～30θ=30～300超限面积流域αt折减系数四川省分区不同流域面积F（km2）综合暴雨24h面深折减系数αt12h面深折减系数αt洪水特征及主要影响因素汇流型式造峰暴雨历时一般较短，层强度集中，植被较差，开垦度大，调蓄能力小，洪峰涨退快，基流较低造峰暴雨历时一般较长，时空分布较均匀，植被较好，水系河网发育，调洪作用大，洪峰涨快退慢，基流较高超限面积流域αt折减系数Kt计算过程局地性强，造峰暴雨历时短，岩体破碎，土质疏松，透水性强，洪峰上尖下肥，基流较高推理公式法求暴雨径流洪峰流量（四川省水文手册）（二分法计算τ1n）确定以日还是以时计算暴雨洪水过程线计算参数0.8470.80716010.9690.9010.8970.8723010.9760.9250.830.78312010.950.8570.7850.7469010.9590.870.8480.82121010.9690.9080.7250.6757010.9350.830.7250.6666010.9220.8130.8220.77216010.9640.8940.3520.2784010.7990.520.760.68913010.9530.856μ计算值Cv2.350.151.880.181.410.23H24P（mm）50100150200250岷江、沱江中游及涪江、嘉陵江中下游盆地腹部丘陵地区0.70.750.790.830.850.80.830.850.870.890.860.880.90.910.920.640.70.740.770.790.740.790.830.860.880.860.880.90.910.920.860.880.90.910.920.80.830.850.870.890.540.60.650.690.720.660.720.760.790.820.80.830.850.870.890.580.630.680.720.740.660.720.760.790.8256789100.70.730.750.770.790.8盐源盆地汇流参数修正系数K大小凉山及马边河一带米仓山、大巴山南坡嘉陵江、渠江中上游龙门山、茶坪山、邛崃山东南破及青衣江流域安宁河及渡口一带岷江、沱江下游及平行岭谷地区高县至綦江长江南岸地区赤水河古蔺地区秀山地区乌江下游及巫山地区岷江上游大渡河中下游根据实测资料的对应分析，μ值随集水面积的减小而增大。在四川其平均变化关系为：μ＝k·F－0.19，k值变化归纳如下:流域地形地貌μ＝4.8·F－0.19平均k值μ＝3.6·F－0.19μ＝6·F－0.19相对高差在200m以下，地势较平缓，植被较差，开垦度大，多为水平梯田相对高差在200m以上，地势较陡，切割较深，植被较好，有部分荒山或坡地四川省小流域暴雨径流关系综合成果表各级雨量H24P（mm）相应24h降雨径流系数α24同上。土层较薄，石灰岩分布较普遍0.810.830.840.850.870.880.60.630.660.690.710.73ⅢⅠⅡⅢ0000000.020.050.130.10.070.050.040.10.20.1650.130.10.060.20.30.260.220.20.090.40.550.480.410.40.130.420.60.530.460.60.180.40.640.580.520.80.240.210.840.680.950.30.131.2410.7610.420.11.341.10.860.950.540.21.421.20.980.80.730.41.581.311.040.61.030.61.651.3551.060.41.490.81.721.411.10.22.10.951.811.4851.160.12.7811.91.551.20.054.60.951.961.641.3200.82.011.7051.40.62.081.7951.510.42.221.961.70.22.512.3052.10.12.852.7152.580.053.163.1563.1504.14.655.2xx双峰单峰东部地区川西南地区单峰yy24h径流系数α240.87τ取值h6.585.87概化矩形历时TP(h)8.467.28m计算值0.8080.810.6440.640.4490.450.795007001000上限面积km2251003000.8860.8530.81111010.9660.9010.730.6780.637010.9240.8020.80.7670.7347010.9320.8220.6020.5320.4734010.8880.7四川省汇流参数m与流域特征系数θ关系见下表。当J=0.0005～0.3可用下式计算其平均值m=0.2J－1/3，m范围为m=0.3～2.5。汇流参数式θ=30～30012h面深折减系数αt6h面深折减系数