暴雨產(chǎn)流計算(推理公式_四川省)

1、推理公式法求暴雨徑流洪峰流量（四川省水文手冊）（二分法計算1n）流域面積F河道長度L河道比降J暴雨頻率P匯流參數(shù)km2km實際值%流量系數(shù)mm修正系數(shù)K14026.470.01611530.470.811.00查表或引用公式時集雨區(qū)對應分區(qū)編號匯流參數(shù)洪水過程線計算參數(shù)地區(qū)東部地區(qū)點面系數(shù)1雨型雙峰損失系數(shù)3編號徑流系數(shù)5金沙江時段點雨量均值變差系數(shù)偏差系數(shù)模比系數(shù)點面系數(shù)面雨量設計值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暴雨強度衰減指數(shù)SP產(chǎn)流歷時tc全面匯流時間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匯流參數(shù)m與流域特征系數(shù)關系見下表。當J=0.00050.3可用下式計算其平均值m=0.2J1/3，m范圍為m=0.32.5。地區(qū)洪水特征及主要影響因素盆地丘陵區(qū) 造峰暴雨歷時一般較短，層強度集中， 植被較差，開墾度大

3、，調(diào)蓄能力小，洪峰漲退快，基流較低盆緣區(qū)造峰暴雨歷時一般較長，時空分布較均 勻，植被較好，水系河網(wǎng)發(fā)育，調(diào)洪作用大，洪峰漲快退慢，基流較高川西南山區(qū) 局地性強，造峰暴雨歷時短，巖體破碎， 土質(zhì)疏松，透水性強，洪峰上尖下肥，基流較高其它四川省分區(qū)不同流域面積F（km2）綜合暴雨24h面深折減系數(shù)t分區(qū)上限面積km225100300500124010.9860.950.92126010.940.8240.745111010.9490.870.82724010.910.7540.6571盆地腹部22010.9740.9190.8792長江河谷33010.9780.9440.9121烏江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雅礱江干流19010.9720.9090.8613德昌以上4010.8150.5390.4234德昌以下17010.9620.8750.81根據(jù)實測資料的對應分析，值隨集水面積的減小而增大。在四川其平均變化關系為：kF0.19，k值變化歸納如下:計算編號地區(qū)流域地形地貌 1青衣江鹿頭山暴雨區(qū)相對高差在200m以上，地勢較陡，切割較深，植被較好，有部分荒山或坡地2盆地丘陵區(qū)相對高差在200m以下

5、，地勢較平緩，植被較差，開墾度大，多為水平梯田3盆緣山區(qū)、川西南山地同上。土層較薄，石灰?guī)r分布較普遍四川省小流域暴雨徑流關系綜合成果表計算編號24計算值分區(qū)名稱分區(qū)范圍10.840盆地腹部丘陵區(qū)岷江、沱江中游及涪江、嘉陵江中下游盆地腹部丘陵地區(qū)20.880岷沱江下游平行嶺谷區(qū)岷江、沱江下游及平行嶺谷地區(qū)30.915長江南岸區(qū)高縣至綦江長江南岸地區(qū)40.780赤水河古藺區(qū)赤水河古藺地區(qū)50.870烏江下游及巫山區(qū)烏江下游及巫山地區(qū)60.915沅江區(qū)秀山地區(qū)70.915大巴山暴雨區(qū)米倉山、大巴山南坡嘉陵江、渠江中上游80.880青衣江鹿頭山暴雨區(qū)龍門山、茶坪山、邛崍山東南破及青衣江流域90.705

6、岷江上游區(qū)岷江上游100.805大渡河中下游區(qū)大渡河中下游110.880涼山區(qū)大小涼山及馬邊河一帶120.730安寧河區(qū)安寧河及渡口一帶130.805鹽源盆地區(qū)鹽源盆地匯流參數(shù)修正系數(shù)K計算值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過程線綜合成果表推求設計頻率洪水過程線東部地區(qū)單峰流量Q歷時t概化相對坐標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與F關系表地區(qū)Q0(m3/s)岷江、大渡河、青衣江12.45金沙江7.28沱江4.55K長江上游干流區(qū)、烏江、沅江2.97涪江、嘉陵江、渠江1.81損失系數(shù)hP超限面積流域t折減系數(shù)24h徑流系數(shù)修正系數(shù)K參數(shù)m修正mm/hmmK6K2424最小

9、否1.41196.290.9410.87QPm取值匯流型式洪峰流量n取值SP取值tc取值取值m/sQPm(m/s)mm/hhh903全面匯流9030.7499.9449.366.58全面匯流部分匯流14250.7296.2758.475.87超限面積流域t折減系數(shù)Kt計算過程設計洪水流量 概化矩形歷時集水區(qū)域t6t24WP(萬m3)TP(h)0.94127488.461111Q0(m3/s)7.281111部分匯流時間雨型歷時T確定以日還是以時計算暴雨2n（h）單峰洪水44.031.83日2.10雙峰洪水61.922.58日4.08洪水過程線計算參數(shù)計算參數(shù)5.87東部地區(qū)單峰是5.99川西南

10、地區(qū)雙峰否匯流參數(shù)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面深折減系數(shù)t7001000上限面積km2251003005000.8960.8714010.9760.9230.8860.6980.6516010.930.8110.730.8020.7818010.9440.8510.80.5970.5464010.8950.7150.602推理公式法求暴雨徑流洪峰流量（四川省水文手冊）（二分法計算1n）匯流參數(shù)四

11、川省匯流參數(shù)m與流域特征系數(shù)關系見下表。當J=0.00050.3可用下式計算其平均值m=0.2J1/3，m范圍為m=0.32.5。洪水特征及主要影響因素造峰暴雨歷時一般較短，層強度集中， 植被較差，開墾度大，調(diào)蓄能力小，洪峰漲退快，基流較低造峰暴雨歷時一般較長，時空分布較均 勻，植被較好，水系河網(wǎng)發(fā)育，調(diào)洪作用大，洪峰漲快退慢，基流較高局地性強，造峰暴雨歷時短，巖體破碎， 土質(zhì)疏松，透水性強，洪峰上尖下肥，基流較高四川省分區(qū)不同流域面積F（km2）綜合暴雨24h面深折減系數(shù)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值計算值CvCs=kCv6F0.192.350.15Cs=3.5Cv4.8F0.191.880.18Cs=3.5Cv3.6F0.191.410.23Cs=3.5C

13、v各級雨量H24P（mm）相應24h降雨徑流系數(shù)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根據(jù)實測資料的對應分析，值隨集水面積的減小而增大。在四川其平均變化關系為：kF0.19，k值變化歸納如下:流域地形地貌 相對高差在200m以上，地勢較陡，切割較深，植被較好，有部分荒山或坡地相對高差在200m以下，地勢較平緩，植被較差，開墾度大，多為水平梯田同上。土層較薄，石灰?guī)r分布較普遍四川省小流域暴雨徑流關系綜合成果表岷江、沱江中游及涪江、嘉陵江中下游盆地腹部丘陵地

15、區(qū)岷江、沱江下游及平行嶺谷地區(qū)高縣至綦江長江南岸地區(qū)赤水河古藺地區(qū)烏江下游及巫山地區(qū)秀山地區(qū)米倉山、大巴山南坡嘉陵江、渠江中上游龍門山、茶坪山、邛崍山東南破及青衣江流域岷江上游大渡河中下游大小涼山及馬邊河一帶安寧河及渡口一帶鹽源盆地匯流參數(shù)修正系數(shù)K0.60.630.660.690.710.730.82川西南地區(qū)雙峰單峰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東部地區(qū)單峰xm計算值0.810.640.450.796h面深折減系數(shù)t7001000上限面積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洪水過程線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)四川省匯流參數(shù)m與流域特征系數(shù)關系見下表。當J=0.00050.3可用下式計算其平均值m=0.2J1/3，m范圍為m=0.32.5。匯流參數(shù)式12h面深折減系數(shù)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徑流關系綜合成果表匯流參數(shù)修正系數(shù)K各級雨量H24P（mm）相應24h降雨徑流系數(shù)240.890.951雙峰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川西南地區(qū)3h面深折減系數(shù)tt計算值1000上限面積km225100300500700100024h0.75310.9550.8750.8110.7610.70.9790.61510.9150.7880.7070.6550.5990.9170.58810.