江门区暴雨强度公式与计算图表.docx

1、江门区暴雨强度公式与计算图表江门市区暴雨强度公式及计算图表江门市水务局江门市气象局广东省气候中心二零一五年十二月说1.本计算图表以新会国家气象观测站35年（19802014年）连续自记雨量记录为基础，利用国内先进的“降水数字化处理系统”得到高精度的原始数据，采用年最大值法进行编制。2.以重现期2、3、5、10、20、30、50、100（年）相应的单一重现期暴雨强度公式制表。设计暴雨强度可按选定设计重现期直接查用表列数值（单一重现期暴雨强度公式见表一）。3.若采用其它重现期，设计暴雨强度可用重现期区间参数公式计算： 式中：q设计暴雨强度（升/秒公顷） t降雨历时（分钟） A雨力 b、n地方常数（

2、A、b、n按重现期区间参数公式计算，公式见表二）4.考虑到绘制全国城市暴雨强度公式等值线图，列出包含重现期在内的暴雨强度总公式： 因总公式精度不及重现期区间参数公式，故建议推求其它重现期设计暴雨强度时使用区间参数公式。明应用重现期区间参数公式计算暴雨强度实例：求P=25年，t=50分钟的暴雨强度q。从重现期区间参数公式II，得：n=0.719 -0.078Lg(P - 4.527)=0.61635（取0.616）b=13.953 -4.138Lg(P - 6.185)=8.67943（取8.679）A=21.737 -2.945Lg(P - 6.737)=18.02166（取18.022）配得

3、P=25年的暴雨强度计算公式如下：可按上式计算1200分钟中任何时段的暴雨强度。当 t=50：=244.982（升/秒/公顷）5.公式误差重现期220年的暴雨强度公式算得的平均绝对均方差为：0.025（mm/min），平均相对均方差为：1.97%。精度符合室外排水设计规范（GB500142006，2014年版）提出的要求。表一 单一重现期暴雨强度公式 重现期 P（年）公 式P24830.308 / (t + 17.044) 0.803P34359.535 / (t + 15.633) 0.760P53853.024 / (t + 13.926) 0.712P103377.408 / (t +

4、11.547) 0.661P203077.977 / (t + 9.235) 0.626P302957.904 / (t + 8.256) 0.609P502825.473 / (t + 7.160) 0.589P1002661.312 / (t + 5.792) 0.564 表二 重现期区间暴雨强度公式P（年）区间参数公 式1 10In0.827 -0.180Lg(P - 0.640)b18.799 -7.198Lg (P - 0.247)A29.900 -10.903Lg (P - 0.771)10100IIn0.719 -0.078Lg (P - 4.527)b13.953 -4.138

5、Lg (P - 6.185)A21.737 -2.945Lg (P - 6.737)江门市区暴雨强度曲线2015年编制延长样本资料后的降水量与重现期曲线图P=2(年) t：分钟；q：升/秒/公顷tqtqtqtqtqtqtq1473.30327231.17153159.27379123.609105101.97713187.32715776.6882453.24128227.04154157.47080122.585106101.31113286.85715876.3363434.99229223.07355155.71381121.580107100.65513386.39215975.987

6、4418.31430219.25756153.99882120.594108100.00813485.93216075.6425403.00731215.58557152.32683119.62510999.37013585.47816175.3016388.90332212.04858150.69484118.67311098.74113685.02916274.9637375.86033208.63959149.10185117.73811198.12213784.58616374.6298363.76134205.35060147.54586116.82011297.51113884.1

7、4716474.2979352.50235202.17661146.02587115.91811396.90813983.71416573.97010341.99736199.10962144.53988115.03111496.31414083.28616673.64511332.16937196.14663143.08889114.15911595.72814182.86216773.32312322.95438193.27964141.66890113.30211695.15014282.44416873.00513314.29339190.50565140.28091112.45911

8、794.57914382.03016972.69014306.13840187.81866138.92292111.63011894.01614481.62017072.37815298.44241185.21667137.59393110.81511993.46114581.21617172.06816291.16842182.69268136.29294110.01312092.91314680.81517271.76217284.28043180.24569135.01995109.22312192.37214780.42017371.45918277.74744177.87070133

9、.77296108.44712291.83814880.02817471.15819271.54345175.56571132.55097107.68312391.31114979.64117570.86020265.64146173.32572131.35498106.93012490.79115079.25817670.56621260.01947171.14873130.18199106.19012590.27715178.87917770.27322254.65848169.03274129.032100105.46112689.77015278.50417869.98423249.5

10、3849166.97475127.905101104.74312789.27015378.13317969.69724244.64450164.97176126.800102104.03612888.77515477.76618069.41325239.96151163.02177125.716103103.33912988.28715577.40318169.13126235.47452161.12378124.653104102.65313087.80415677.04318268.852P=3(年) t：分钟；q：升/秒/公顷tqtqtqtqtqtqtq1514.63927251.671

11、53175.25779137.293105114.16313198.42515786.9412492.30328247.27554173.34180136.200106113.44913297.91815886.5603472.09029243.05355171.47281135.128107112.74513397.41715986.1844453.70230238.99556169.65082134.075108112.05213496.92116085.8105436.89131235.08957167.87283133.040109111.36813596.43216185.44164

12、21.45532231.32958166.13784132.024110110.69313695.94816285.0757407.22733227.70559164.44285131.026111110.02813795.47016384.7138394.06334224.21060162.78786130.045112109.37313894.99716484.3549381.84535220.83661161.17087129.081113108.72613994.53016583.99910370.47036217.57862159.59088128.133114108.0881409

13、4.06816683.64711359.84937214.42963158.04589127.201115107.45814193.61116783.29912349.90938211.38464156.53490126.285116106.83714293.16016882.95413340.58239208.43765155.05791125.384117106.22514392.71316982.61214331.81140205.58366153.61192124.498118105.62014492.27117082.27415323.54641202.81867152.196931

14、23.626119105.02314591.83417181.93916315.74342200.13868150.81194122.768120104.43414691.40217281.60717308.36243197.53969149.45595121.924121103.85314790.97517381.27818301.36944195.01670148.12796121.093122103.27914890.55217480.95219294.73245192.56771146.82597120.275123102.71214990.13417580.62920288.4254

15、6190.18872145.55098119.469124102.15315089.72017680.30921282.42147187.87573144.30099118.677125101.60015189.31017779.99222276.69948185.62774143.075100117.896126101.05415288.90517879.67823271.23949183.44075141.874101117.127127100.51515388.50417979.36624266.02250181.31276140.696102116.36912899.98315488.

16、10718079.05825261.03151179.24177139.540103115.62312999.45715587.71518178.75226256.25252177.22378138.406104114.88813098.93815687.32618278.449P=5(年) t：分钟；q：升/秒/公顷tqtqtqtqtqtqtq1562.28227274.19453193.18779152.928105128.293131111.44615799.0932536.91028269.52254191.15880151.767106127.531132110.90215898.6

17、823514.12829265.03655189.17981150.627107126.779133110.36415998.2754493.53930260.72656187.24982149.508108126.038134109.83216097.8735474.82731256.58057185.36583148.408109125.307135109.30716197.4746457.73532252.59058183.52784147.327110124.586136108.78716297.0797442.05233248.74659181.73185146.265111123.

18、875137108.27316396.6888427.60134245.03960179.97786145.221112123.174138107.76516496.3019414.23635241.46261178.26487144.195113122.482139107.26316595.91810401.83436238.00962176.58988143.187114121.800140106.76716695.53811390.28837234.67263174.95189142.195115121.127141106.27616795.16112379.50938231.44564

19、173.35090141.219116120.462142105.79016894.78913369.41939228.32365171.78391140.260117119.806143105.30916994.41914359.95140225.30066170.25092139.316118119.159144104.83417094.05415351.04641222.37267168.75093138.387119118.520145104.36417193.69116342.65342219.53368167.28194137.473120117.889146103.8991729

20、3.33217334.72743216.78169165.84295136.573121117.266147103.43917392.97618327.22844214.10970164.43296135.687122116.651148102.98417492.62419320.12145211.51671163.05197134.815123116.044149102.53317592.27520313.37446208.99772161.69898133.956124115.445150102.08717691.92821306.95947206.54973160.37199133.11

21、1125114.852151101.64617791.58522300.85048204.16874159.071100132.278126114.267152101.21017891.24523295.02749201.85375157.795101131.457127113.689153100.77817990.90824289.46750199.59976156.544102130.649128113.118154100.35018090.57425284.15251197.40677155.316103129.852129112.55415599.92718190.24326279.0

22、6652195.26978154.111104129.067130111.99715699.50818289.915P=10(年) t：分钟；q：升/秒/公顷tqtqtqtqtqtqtq1634.52527302.16553214.90979171.826105145.421131127.297157113.9522603.16428297.09254212.73780170.583106144.602132126.710158113.5073575.42729292.22955210.61881169.363107143.794133126.130159113.0674550.6873028

23、7.56056208.55282168.164108142.998134125.556160112.6315528.45831283.07557206.53683166.986109142.213135124.989161112.1996508.35332278.76158204.56884165.829110141.438136124.429162111.7717490.06633274.60959202.64785164.692111140.675137123.874163111.3478473.34734270.60960200.77086163.574112139.921138123.326164110.9289457.99135266.75261198.93687162.475113139.177139122.784165110.51210443.82836263.03062197.14488161.394114138.443140122.248166