暴雨产流计算(推理公式_四川省)

1、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1n）流域面积F河道长度L河道比降J暴雨频率P汇流参数km2km实际值%流量系数mm修正系数K14026.470.01611530.470.811.00查表或引用公式时集雨区对应分区编号汇流参数洪水过程线计算参数地区东部地区点面系数1雨型双峰损失系数3编号径流系数5金沙江时段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/CvKPtPtP10180.353.51.670.98129.481h460.423.51.820.96880.933h600.453.51.880.939106.026h860.533.5

2、2.050.896158.1224h1100.553.52.090.979225.56暴雨强度衰减指数SP产流历时tc全面汇流时间mm/hh1n（h）0.1-10.36n0.1-10.4496.274299.35.61n120.5896.27328.06.041-60.67n1-60.7296.2758.56.576-240.70n6-240.7499.9449.46.58四川省汇流参数m与流域特征系数关系见下表。当J=0.00050.3可用下式计算其平均值m=0.2J1/3，m范围为m=0.32.5。地区洪水特征及主要影响因素盆地丘陵区 造峰暴雨历时一般较短，层强度集中， 植被较差，开垦度大

3、，调蓄能力小，洪峰涨退快，基流较低盆缘区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，基流较高川西南山区 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，基流较高其它四川省分区不同流域面积F（km2）综合暴雨24h面深折减系数t分区上限面积km225100300500124010.9860.950.92126010.940.8240.745111010.9490.870.82724010.910.7540.6571盆地腹部22010.9740.9190.8792长江河谷33010.9780.9440.9121乌江18010.9

4、70.9080.8652江北以下11010.9630.8780.8243江北以上27010.9750.9160.87747010.9380.8350.771金沙江下段7010.9280.8320.7712雅砻江干流19010.9720.9090.8613德昌以上4010.8150.5390.4234德昌以下17010.9620.8750.81根据实测资料的对应分析，值随集水面积的减小而增大。在四川其平均变化关系为：kF0.19，k值变化归纳如下:计算编号地区流域地形地貌 1青衣江鹿头山暴雨区相对高差在200m以上，地势较陡，切割较深，植被较好，有部分荒山或坡地2盆地丘陵区相对高差在200m以下

5、，地势较平缓，植被较差，开垦度大，多为水平梯田3盆缘山区、川西南山地同上。土层较薄，石灰岩分布较普遍四川省小流域暴雨径流关系综合成果表计算编号24计算值分区名称分区范围10.840盆地腹部丘陵区岷江、沱江中游及涪江、嘉陵江中下游盆地腹部丘陵地区20.880岷沱江下游平行岭谷区岷江、沱江下游及平行岭谷地区30.915长江南岸区高县至綦江长江南岸地区40.780赤水河古蔺区赤水河古蔺地区50.870乌江下游及巫山区乌江下游及巫山地区60.915沅江区秀山地区70.915大巴山暴雨区米仓山、大巴山南坡嘉陵江、渠江中上游80.880青衣江鹿头山暴雨区龙门山、茶坪山、邛崃山东南破及青衣江流域90.705

6、岷江上游区岷江上游100.805大渡河中下游区大渡河中下游110.880凉山区大小凉山及马边河一带120.730安宁河区安宁河及渡口一带130.805盐源盆地区盐源盆地汇流参数修正系数K计算值1234K平均10.520.590.640.67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推求设计频率洪水过程线东部地区单峰流量Q历时t概化相对坐标yxm3/shyx7.300000052.50.850.050.10.050.20.1197.61.400.10.1650.10.260.15188.02.200.20.260.20.3

7、40.2368.74.060.40.480.40.40.245386.74.480.420.530.60.50.315368.74.900.40.580.80.620.4188.07.100.20.840.950.750.495124.78.460.13110.90.697.69.300.11.10.950.980.7188.010.150.21.20.81.090.815368.711.080.41.310.61.240.985549.411.460.61.3550.41.441.235730.111.920.81.410.21.791.64865.612.560.951.4850.12.1

8、2.1910.813.1111.550.052.382.58865.613.870.951.6403.13.85730.114.420.81.705549.415.180.61.795368.716.570.41.96188.019.490.22.30597.622.960.12.71552.526.690.053.15639.3204.65基流量Q0与F关系表地区Q0(m3/s)岷江、大渡河、青衣江12.45金沙江7.28沱江4.55K长江上游干流区、乌江、沅江2.97涪江、嘉陵江、渠江1.81损失系数hP超限面积流域t折减系数24h径流系数修正系数K参数m修正mm/hmmK6K2424最小

9、否1.41196.290.9410.87QPm取值汇流型式洪峰流量n取值SP取值tc取值取值m/sQPm(m/s)mm/hhh903全面汇流9030.7499.9449.366.58全面汇流部分汇流14250.7296.2758.475.87超限面积流域t折减系数Kt计算过程设计洪水流量 概化矩形历时集水区域t6t24WP(万m3)TP(h)0.94127488.461111Q0(m3/s)7.281111部分汇流时间雨型历时T确定以日还是以时计算暴雨2n（h）单峰洪水44.031.83日2.10双峰洪水61.922.58日4.08洪水过程线计算参数计算参数5.87东部地区单峰是5.99川西南

10、地区双峰否汇流参数式=130=30300m=0.400.2040.803m=0.0920.6360.808m=0.3180.2040.638m=0.0550.720.644m=0.2210.2040.444m=0.0250.8450.44912h面深折减系数t7001000上限面积km2251003005000.8960.8714010.9760.9230.8860.6980.6516010.930.8110.730.8020.7818010.9440.8510.80.5970.5464010.8950.7150.602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1n）汇流参数四

11、川省汇流参数m与流域特征系数关系见下表。当J=0.00050.3可用下式计算其平均值m=0.2J1/3，m范围为m=0.32.5。洪水特征及主要影响因素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，基流较高四川省分区不同流域面积F（km2）综合暴雨24h面深折减系数t0.8470.80716010.9690.9010.8510.8970.8723010.9760.9250.8870.8

12、30.78312010.950.8570.7950.7850.7469010.9590.870.8110.8480.82121010.9690.9080.8680.7250.6757010.9350.830.7630.7250.6666010.9220.8130.7380.8220.77216010.9640.8940.840.3520.2784010.7990.520.40.760.68913010.9530.8560.78 平均k值计算值CvCs=kCv6F0.192.350.15Cs=3.5Cv4.8F0.191.880.18Cs=3.5Cv3.6F0.191.410.23Cs=3.5C

13、v各级雨量H24P（mm）相应24h降雨径流系数24H24P（mm）501001502002503000.70.750.790.830.850.860.80.830.850.870.890.90.860.880.90.910.920.930.640.70.740.770.790.810.740.790.830.860.880.890.860.880.90.910.920.930.860.880.90.910.920.930.80.830.850.870.890.90.540.60.650.690.720.740.660.720.760.790.820.830.80.830.850.870.89

14、0.90.580.630.680.720.740.760.660.720.760.790.820.835678910150.70.730.750.770.790.80.870.810.830.840.850.870.880.92根据实测资料的对应分析，值随集水面积的减小而增大。在四川其平均变化关系为：kF0.19，k值变化归纳如下:流域地形地貌 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，多为水平梯田同上。土层较薄，石灰岩分布较普遍四川省小流域暴雨径流关系综合成果表岷江、沱江中游及涪江、嘉陵江中下游盆地腹部丘陵地

15、区岷江、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乌江下游及巫山地区秀山地区米仓山、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岷江上游大渡河中下游大小凉山及马边河一带安宁河及渡口一带盐源盆地汇流参数修正系数K0.60.630.660.690.710.730.82川西南地区双峰单峰yxyx00000000.020.050.130.10.070.050.10.040.10.20.1650.130.10.130.060.20.30.260.220.20.180.090.40.550.480.410.40.230.130.420.60.530.460.60.2

16、80.180.40.640.580.520.80.330.240.210.840.680.950.360.30.131.2410.7610.40.420.11.341.10.860.950.490.540.21.421.20.980.80.60.730.41.581.311.040.60.781.030.61.651.3551.060.41.071.490.81.721.411.10.21.82.10.951.811.4851.160.12.62.7811.91.551.20.053.24.60.951.961.641.3203.90.82.011.7051.40.62.081.7951.51

17、0.42.221.961.70.22.512.3052.10.12.852.7152.580.053.163.1563.1504.14.655.2东部地区单峰xm计算值0.810.640.450.796h面深折减系数t7001000上限面积km2251003005007000.8530.81111010.9660.9010.850.8050.6780.637010.9240.8020.7210.670.7670.7347010.9320.8220.7560.720.5320.4734010.8880.70.5790.506洪水过程线45 40 35 30 25 20 15 10 5 0 0.0

18、 100.0 200.0 300.0 400.0 500.0 600.0 700.0 800.0 900.0 1000.0 t(h)Q(m3/s)四川省汇流参数m与流域特征系数关系见下表。当J=0.00050.3可用下式计算其平均值m=0.2J1/3，m范围为m=0.32.5。汇流参数式12h面深折减系数t0.8110.76813010.960.8740.8130.770.870.84210.970.910.870.840.7470.68910.9360.8340.7630.7120.770.7219010.9470.8470.7810.7290.8390.80110010.9640.90.8

19、560.8240.7160.6647010.930.8210.750.70.6850.6276010.9140.7980.7260.6590.7970.74712010.9520.8680.8130.7720.3260.2514010.7780.4940.3720.2990.720.64610010.9380.8130.7250.6693504004505000.870.880.890.890.910.920.930.930.930.940.950.950.820.830.840.840.90.90.910.910.930.940.950.950.930.940.950.950.910.920

20、.930.930.750.760.840.850.850.860.910.920.930.930.780.790.840.852025300.920.9610.950.981四川省小流域暴雨径流关系综合成果表汇流参数修正系数K各级雨量H24P（mm）相应24h降雨径流系数240.890.951双峰yx000.050.050.10.10.20.20.260.310.20.530.110.21.10.41.150.61.190.81.230.951.2611.30.951.370.81.450.61.60.41.830.22.420.13.050.053.604.7川西南地区3h面深折减系数tt计算值1000上限面积km225100300500700100024h0.75310.9550.8750.8110.7610.70.9790.61510.9150.7880.7070.6550.5990.9170.58810.