茂名市中心城区暴雨强度公式及计算图表.docx

茂名市中心城区暴雨强度公式及计算图表广东省气象防灾技术服务中心二零一六年十一月应用重现期区间参数公式计算暴雨强度实例:求P=25年,t=50min的暴雨强度q。从重现期区间参数公式II,得：n=0.549-0.002Ln(P-5.080)=0.543017(取0.543)b=3.499+0.369Ln(P-3.975)=4.622868(取4.623)A=Il.341÷1.161Ln(P-2.870)=14.93654(取14.937)配得P=25年的暴雨强度计算公式如下：167x14,937"(f+4.623严3可按上式计算118Onlin中任何时段的暴雨强度。当t=50：=284. 174L(s hm2)167x14.937(50+4.623)05435.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：0.041(mmmin),平均相对均方差为：2.38%0精度符合室外排水设计规范(GB500142006,2014年版)提出的要求。1 .本计算图表以茂名国家气象观测站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）o3 .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：167q=«+）"式中：q设计暴雨强度L（sh112）t降雨历时（Inin）A一雨力b、n一地方常数（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：1861.341X（1+0.360LgP）q«+5.590严67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。表二重现期区间暴雨强度公式P（年）区间参数公式110In0.601-0.030Ln(P-0.836)b5.053-0.618Ln(P-0.771)A12.356+0.395Ln(P+0.154)10100IIn0.549-0.002Ln(P-5.080)b3.499+0.369Ln(P-3.975)A11.341+1.161Ln(P-2.870)表一单一重现期暴雨强度公式重现期P（年）公式P=22114.053/(t+4.926)0596P=32139.27/(t+4.558)0,578P=52171.668/(t+4.162)°-558P=IO2274.874/(t+4.162)0546P=202444.713/(t+4.523)0544P=302533.891/(t+4.702)0543P=402594.679/(t+4.822)0542P=502640.938/(t+4.912)°-541P=602678.346/(t+4.985)0541P=702709.575/(t+5.045)°圳P=802736.462/(t+5.097)054°P=902760.176/(t+5.143)0540P=1002781.218/(t+5.183)°国°翻册h（抑I）延长样本资料后的降水量与重现期曲线图三(5)P=2(年)t：min；q：L/(shm2)tqtqtqtqtqtqtq1732.06527268.31553188.12479150.825105128.416131113.153157101.9442667.09628263.42854186.2148()149.764106127.725132112.66()158101.5713615.57329258.77355184.35681148.723107127.044133112.173159101.2014573.4883025433156182.54682147.701108126.372134111.691160100.8355538.31731250.08857180.78483146.697109125.710135111.214161100.4726508.38532246.02958179.06684145.712110125.057136110.743162100.1137482.53133242.14259177.39185144.744111124.413137110.27816399.7588459.92134238.41560175.75886143.793112123.777138109.81716499.4059439.94235234.83761174.16487142.859113123.151139109.36216599.05610422.12936231.40062172.60888141.940114122.532140108.91116698.71011406.12637228.09563171.08989141.038115121.922141108.46616798.36812391.64938224.91364169.60590140.150116121.320142108.02516898.02813378.47739221.84765168.15691139.278117120.726143107.58916997.69214366.42840218.89166166.73892138.420118120.140144107.15817097.35915355.35441216.03767165.35393137.575119119.561145106.73217197.02816345.13342213.28268163.99894136.745120118.990146106.31017296.70117335.66343210.61869162.67295135.928121118.426147105.89217396.37718326.85944208.04270161.37496135.123122117.869148105.47917496.05619318.64745205.54871160.10497134.332123117.319149105.07017595.73720310.96546203.13372158.86198133.552124116.776150104.66517695.42121303.75947200.79273157.64299132.785125116.239151104.26417795.10822296.98448198.52274156.449100132.029126115.709152103.86817894.79823290.59949196.32075155.279101131.285127115.186153103.47517994.49124284.56950194.18276154.133102130.552128114.669154103.08718()94.18625278.86351192.10577153.009103129.829129114.157155102.70218193.88326273.45352190.08678151.906104129.118130113.652156102.32118293.584P=3(年)t：min；q：L/(shm2)tqtqtqtqtqtqtq1793.78527290.92553205.55379165.713105141.694131125.284157113.2012721.39328285.72654203.5178()164.577106140.952132124.753158112.7983664.57929280.77355201.53581163.463107140.220133124.228159112.3994618.52130276.04856199.60582162.369108139.499134123.709160112.0045580.24831271.53457197.72483161.294109138.787135123.196161111.6126547.81732267.21658195.89184160.239110138.086136122.689162111.2257519.90033263.08059194.10385159.202111137.394137122.187163110.8408495.55234259.11460192.36086158.184112136.711138121.691164110.4609474.08535255.30861190.65887157.183113136.038139121.200165110.08310454.98136251.65062188.99788156.199114135.373140120.715166109.70911437.84137248.13263187.37589155.232115134.718141120.235167109.33912422.35638244.74564185.79190154.281116134.071142119.760168108.97313408.28139241.48265184.24291153.346117133.432143119.290169108.60914395.41640238.33466182.72892152.426118132.802144118.826170108.24915383.60141235.29667181.24893151.521119132.180145118.366171107.89216372.70342232.36268179.80094150.630120131.565146117.911172107.53917362.61043229.52569178.38395149.754121130.958147117.460173107.18818353.23044226.78170176.99696148.891122130.359148117.015174106.84119344.48445224.12571175.63897148.042123129.768149116.574175106.49620336.30646221.55272174.30998147.206124129.183150116.137176106.15521328.63647219.05873173.00699146.383125128.606151115.705177105.81722321.42648216.63974171.730100145.572126128.036152115.277178105.48123314.63249214.29275170.479101144.773127127.472153114.854179105.14924308.21650212.01276169.252102143.986128126.916154114.43418()104.81925302.14551209.79877168.050103143.211129126.365155114.019181104.49226296.39052207.64678166.870104142.447130125.822156113.608182104.168P=5(年)t：min；q：L/(shm2)tqtqtqtqtqtqtq1869.04227318.67753227.15879184.279105158.325131140.532157127.3922787.27928313.10954224.9708()183.054106157.521132139.956158126.9533723.91029307.80555222.84081181.851107156.729133139.385159126.5184672.99430302.74556220.76682180.670108155.948134138.821160126.0875630.96131297.91057218.74483179.511109155.177135138.264161125.6616595.52432293.28458216.77484178.372110154.417136137.713162125.2387565.13733288.85459214.85285177.253111153.668137137.167163124.8208538.71734284.60560212.97786176.153112152.928138136.628164124.4059515.48035280.52761211.14787175.072113152.199139136.095165123.99410494.84136276.60862209.36088174.010114151.478140135.567166123.58711476.35637272.83863207.61589172.965115150.768141135.045167123.18312459.67738269.20864205.91090171.938116150.066142134.529168122.78413444.53439265.70965204.24391170.927117149.374143134.018169122.38714430.70540262.33566202.61492169.933118148.690144133.513170121.99515418.01541259.07867201.02093168.955119148.016145133.012171121.60616406.31642255.93168199.46194167.992120147.349146132.517172121.22017395.48843252.88869197.93595167.045121146.691147132.028173120.83818385.42844249.94570196.44196166.112122146.041148131.543174120.45919376.05245247.09571194.97897165.194123145.399149131.063175120.08320367.28746244.33472193.54698164.290124144.765150130.588176119.71121359.06947241.65873192.14299163.399125144.139151130.117177119.34222351.34448239.06274190.766100162.522126143.520152129.652178118.97623344.06749236.54275189.418101161.658127142.908153129.191179118.61324337.19550234.09576188.096102160.806128142.304154128.73418()118.25325330.69351231.71777186.799103159.967129141.706155128.282181117.89626324.53052229.40678185.527104159.140130141.116156127.835182117.542P=IO (年)t：min；q：L/(shm2)tqtqtqtqtqtqtq1928.45027347.88753249.79179203.553105175.457131156.139157141.8382842.88728341.93954247.4378()202.229106174.585132155.512158141.3603776.44129336.27055245.14481200.929107173.726133154.892159140.8864722.96430330.85956242.91182199.653108172.879134154.278160140.4175678.75131325.68857240.73583198.399109172.043135153.672161139.9526641.42632320.73958238.61284197.167110171.218136153.073162139.4917609.38333315.99759236.54285195.956111170.405137152.479163139.0358581.49334311.44960234.52286194.767112169.603138151.893164138.5839556.93935307.08161232.55087193.597113168.811139151.313165138.13510535.11036302.88262230.62488192.447114168.029140150.739166137.69111515.54237298.84263228.74389191.317115167.258141150.171167137.25112497.87438294.95164226.90590190.205116166.496142149.609168136.81613481.81839291.20065225.10791189.111117165.745143149.053169136.38414467.14740287.58166223.35092188.034118165.002144148.503170135.95615453.67541284.08767221.63193186.975119164.270145147.959171135.53116441.24742280.71068219.94894185.933120163.546146147.420172135.11117429.73843277.44469218.30295184.907121162.831147146.886173134.69418419.03944274.28470216.69096183.897122162.125148146.359174134.28019409.06245271.22471215.11197182.902123161.428149145.836175133.87120399.73046268.25872213.56498181.922124160.739150145.319176133.46421390.97647265.38273212.04899180.957125160.058151144.807177133.06222382.74548262.59274210.563100180.006126159.386152144.300178132.66223374.98549259.88475209.106101179.070127158.721153143.798179132.26624367.65650257.25376207.678102178.147128158.064154143.30018()131.87425360.71751254.69677206.277103177.237129157.415155142.808181131.48426354.13852252.21078204.902104176.341130156.773156142.321182131.098P=20(年)t：min；q：L/(shm2)tqtqtqtqtqtqtq1964.90527374.08953269.69679220.174105189.993131169.205157153.7972881.39128367.78754267.1798()218.753106189.056132168.529158153.2823815.58929361.77755264.72881217.358107188.132133167.862159152.7714762.05430356.03856262.33982215.987108187.220134167.201160152.2655717.42231350.55157260.01183214.641109186.321135166.548161151.7646679.49132345.29658257.74084213.319110185.434136165.903162151.2687646.75033340.25959255.52585212.019111184.559137165.264163150.7768618.12234335.42660253.36386210.742112183.696138164.632164150.2889592.82235330.78261251.25287209.486113182.844139164.007165149.80510570.25536326.31662249.19088208.251114182.003140163.389166149.32711549.96837322.01763247.17689207.037115181.173141162.777167148.85312531.60338317.87564245.20790205.843116180.354142162.172168148.38313514.87939313.88165243.28291204.668117179.545143161.573169147.91714499.56640310.02666241.39992203.511118178.746144160.980170147.45515485.47941306.30267239.55793202.374119177.958145160.393171146.99816472.46442302.70368237.75594201.253120177.179146159.813172146.54417460.39343299.22169235.99095200.151121176.410147159.238173146.09418449.15844295.85170234.26296199.065122175.650148158.670174145.64919438.66845292.58671232.57097197.996123174.899149158.106175145.20720428.84446289.42172230.91198196.943124174.158150157.549176144.76921419.62147286.35173229.28699195.906125173.425151156.997177144.33422410.93948283.37374227.693100194.884126172.701152156.451178143.90323402.74849280.48075226.131101193.877127171.985153155.910179143.47624395.00450277.67076224.599102192.885128171.278154155.37418()143.05325387.66951274.93877223.096103191.907129170.579155154.843181142.63326380.70752272.28178221.621104190.943130169.888156154.318182142.216P=30(年)t：min；q：L/(shm2)tqtqtqtqtqtqtq1984.61227387.88()53280.19679228.951105197.675131176.114157160.1242901.90128381.39454277.5948()227.479106196.703132175.413158159.5883836.30029375.20755275.05981226.034107195.745133174.720159159.0584782.66330369.29756272.58982224.615108194.800134174.035160158.5335737.77231363.64457270.18183223.220109193.868135173.358161158.0136699.50132358.23058267.83384221.850110192.948136172.687162157.4987666.38133353.03859265.54285220.504111192.041137172.025163156.9878637.36134348.05660263.30586219.18111219