（一）总公式.doc

（一）总公式（二）单一重现期暴雨强度公式重现期 P（年）暴雨强度公式P2P3P5P10P20P30P50P100 附件南丹县城市排水防涝暴 雨 强 度 公 式 及 计 算 图 表（设 计 用 表）河池市安信达气象灾害防御技术服务中心2019年1月说 明1.本计算公式和图表是根据南丹国家气象站52年（19662017年）的连续自记雨量记录为基础，采用“年最大值法”对暴雨样本资料进行选样，由耿贝尔分布曲线拟合数据，得到P-i-t关系表，再由最小二乘法求解公式参数得到。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编制查算表（表二），设计暴雨强度可按选定设计重现期直接查用表中对应的数值（单一重现期暴雨强度公式见表一）。3.若采用其它重现期，设计暴雨强度可用暴雨强度总公式计算： 式中：q设计暴雨强度升/（秒公顷） i设计暴雨强度（毫米/分钟） P设计暴雨重现期（年） t降雨历时（分钟）4.适用范围本计算公式和图表适用的时间范围是1200分钟，空间范围是南丹县城区。5.公式误差重现期220年的暴雨强度总公式算得的平均绝对均方差为0.016（mm/min），平均相对均方差为1.49%；单一重现期暴雨强度公式平均绝对方差为0.011mm/min，平均相对均方差为0.70%，精度符合室外排水设计规范（GB500142006，2016年版）的要求。单一重现期暴雨强度公式精度明显优于暴雨强度总公式，推荐使用单一重现期暴雨强度公式。表一 单一重现期暴雨强度公式重现期 P（年）暴雨强度公式P2P3P5P10P20P30P50P100 表二 暴雨强度查算表P=2a t（min） qL/（shm2）tqtqtqtqtq1427.70541171.89781112.17712184.64116168.5712410.86042169.54382111.24712284.13816268.2533395.40343167.25883110.33412383.64216367.9384381.16544165.03984109.43712483.15216467.6275368.00445162.88485108.55612582.66816567.3196355.79946160.79086107.69012682.19016667.0147344.44747158.75487106.84012781.71816766.7128333.86048156.77388106.00312881.25216866.4139323.96049154.84689105.18212980.79216966.11610314.68150152.97090104.37313080.33717065.82311305.96651151.14391103.57913179.88917165.53312297.76252149.36392102.79713279.44517265.24513290.02553147.62893102.02813379.00717364.96014282.71554145.93794101.27213478.57417464.67815275.79755144.28895100.52813578.14617564.39816269.24056142.6799699.79613677.72417664.12117263.01457141.1089799.07513777.30617763.84718257.09558139.5769898.36613876.89317863.57519251.46159138.0799997.66813976.48617963.30620246.09060136.61710096.98014076.08218063.03921240.96461135.18810196.30314175.68418162.77522236.06762133.79210295.63614275.29018262.51323231.38263132.42710394.98014374.90018362.25324226.89664131.09210494.33314474.51518461.99625222.59765129.78610593.69614574.13418561.74126218.47266128.50810693.06814673.75718661.48927214.51067127.25810792.44914773.38518761.23828210.70368126.03410891.83914873.01618860.99029207.04169124.83510991.23814972.65218960.74430203.51570123.66111090.64515072.29219060.50031200.11971122.51111190.06115171.93519160.25932196.84472121.38511289.48515271.58219260.01933193.68473120.28011388.91715371.23319359.78234190.63374119.19811488.35715470.88819459.54635187.68675118.13611587.80415570.54719559.31336184.83676117.09511687.25915670.20919659.08237182.08077116.07411786.72115769.87419758.85238179.41278115.07211886.19115869.54319858.62539176.82879114.08911985.66815969.21619958.39940174.32480113.12512085.15116068.89120058.176P=2a t（min） i（mm/min）tititititi12.561411.029810.6721210.5071610.41122.460421.015820.6661220.5041620.40932.368431.002830.6611230.5011630.40742.282440.988840.6551240.4981640.40552.204450.975850.6501250.4951650.40362.131460.963860.6451260.4921660.40172.063470.951870.6401270.4891670.39981.999480.939880.6351280.4871680.39891.940490.927890.6301290.4841690.396101.884500.916900.6251300.4811700.394111.832510.905910.6201310.4781710.392121.783520.894920.6161320.4761720.391131.737530.884930.6111330.4731730.389141.693540.874940.6061340.4711740.387151.651550.864950.6021350.4681750.386161.612560.854960.5981360.4651760.384171.575570.845970.5931370.4631770.382181.539580.836980.5891380.4601780.381191.506590.827990.5851390.4581790.379201.474600.8181000.5811400.4561800.377211.443610.8101010.5771410.4531810.376221.414620.8011020.5731420.4511820.374231.386630.7931030.5691430.4491830.373241.359640.7851040.5651440.4461840.371251.333650.7771050.5611450.4441850.370261.308660.7701060.5571460.4421860.368271.284670.7621070.5541470.4391870.367281.262680.7551080.5501480.4371880.365291.240690.7481090.5461490.4351890.364301.219700.7401100.5431500.4331900.362311.198710.7341110.5391510.4311910.361321.179720.7271120.5361520.4291920.359331.160730.7201130.5321530.4271930.358341.142740.7141140.5291540.4241940.357351.124750.7071150.5261550.4221950.355361.107760.7011160.5231560.4201960.354371.090770.6951170.5191570.4181970.352381.074780.6891180.5161580.4161980.351391.059790.6831190.5131590.4141990.350401.044800.6771200.5101600.4132000.348P=3a t（min） qL/（shm2）tqtqtqtqtq1466.47941190.22181124.75412194.40916176.6442448.47442187.64882123.73112293.85416276.2923431.93143185.15083122.72612393.30516375.9444416.67444182.72584121.73912492.76416475.6005402.55545180.36885120.76912592.23016575.2596389.44746178.07786119.81612691.70216674.9217377.24347175.84987118.88012791.18116774.5868365.85048173.68288117.96012890.66616874.2559355.18849171.57289117.05512990.15816973.92710345.18750169.51890116.16513089.65617073.60211335.78551167.51891115.29013189.16017173.28012326.92852165.56892114.42913288.67017272.96213318.57053163.66893113.58213388.18617372.64614310.66854161.81594112.74913487.70717472.33415303.18555160.00895111.93013587.23517572.02416296.08756158.24596111.12313686.76817671.71717289.34557156.52397110.32913786.30617771.41318282.93258154.84398109.54813885.85017871.11219276.82459153.20199108.77813985.39917970.81420270.99860151.598100108.02014084.95318070.51821265.43661150.031101107.27414184.51318170.22622260.11862148.499102106.53914284.07718269.93523255.03063147.001103105.81514383.64618369.64824250.15664145.536104105.10214483.22018469.36325245.48265144.103105104.39914582.79918569.08026240.99666142.700106103.70714682.38218668.80127236.68667141.327107103.02414781.97018768.52328232.54368139.983108102.35214881.56318868.24829228.55569138.667109101.68814981.16018967.97630224.71670137.377110101.03515080.76119067.70531221.01571136.114111100.39015180.36719167.43832217.44672134.87611299.75515279.97719267.17233214.00173133.66211399.12815379.59119366.90934210.67474132.47311498.51015479.20919466.64835207.45975131.30611597.90015578.83119566.38936204.35076130.16211697.29915678.45719666.13337201.34277129.03911796.70515778.08719765.87838198.42978127.93811896.12015877.72019865.62639195.60879126.85611995.54215977.35819965.37640192.87380125.79512094.97216076.99920065.128P=3a t（min） i（mm/min）tititititi12.793411.139810.7471210.5651610.45922.685421.124820.7411220.5621620.45732.586431.109830.7351230.5591630.45542.495441.094840.7291240.5551640.45352.411451.080850.7231250.5521650.45162.332461.066860.7171260.5491660.44972.259471.053870.7121270.5461670.44782.191481.040880.7061280.5431680.44592.127491.027890.7011290.5401690.443102.067501.015900.6961300.5371700.441112.011511.003910.6901310.5341710.439121.958520.991920.6851320.5311720.437131.908530.980930.6801330.5281730.435141.860540.969940.6751340.5251740.433151.815550.958950.6701350.5221750.431161.773560.948960.6651360.5201760.429171.733570.937970.6611370.5171770.428181.694580.927980.6561380.5141780.426191.658590.917990.6511390.5111790.424201.623600.9081000.6471400.5091800.422211.589610.8981010.6421410.5061810.421221.558620.8891020.6381420.5031820.419231.527630.8801030.6341430.5011830.417241.498640.8711040.6291440.4981840.415251.470650.8631050.6251450.4961850.414261.443660.8541060.6211460.4931860.412271.417670.8461070.6171470.4911870.410281.392680.8381080.6131480.4881880.409291.369690.8301090.6091490.4861890.407301.346700.8231100.6051500.4841900.405311.323710.8151110.6011510.4811910.404321.302720.8081120.5971520.4791920.402331.281730.8001130.5941530.4771930.401341.262740.7931140.5901540.4741940.399351.242750.7861150.5861550.4721950.398361.224760.7791160.5831560.4701960.396371.206770.7731170.5791570.4681970.394381.188780.7661180.5761580.4651980.393391.171790.7601190.5721590.4631990.391401.155800.7531200.5691600.4612000.390P=5a t（min） qL/（shm2）tqtqtqtqtq1511.58141211.69081139.531121105.90716186.1592492.24342208.86382138.400122105.29016285.7683474.44943206.11883137.288123104.68116385.3814458.01844203.45284136.196124104.08016484.9975442.79545200.86185135.123125103.48716584.6176428.64646198.34186134.069126102.90116684.2417415.46047195.89087133.033127102.32216783.8698403.13848193.50688132.014128101.75016883.5009391.59749191.18489131.012129101.18616983.13510380.76150188.92490130.027130100.62817082.77311370.56751186.72191129.058131100.07717182.41512360.95752184.57592128.10513299.53317282.06013351.88153182.48293127.16713398.99517381.70914343.29554180.44194126.24513498.46317481.36015335.15855178.45095125.33713597.93817581.01516327.43656176.50696124.44313697.41917680.67417320.09757174.60997123.56313796.90617780.33518313.11258172.75798122.69713896.39917880.00019306.45559170.94799121.84513995.89817979.66820300.10360169.179100121.00514095.40218079.33821294.03561167.450101120.17814194.91218179.01222288.23262165.761102119.36314294.42818278.68923282.67663164.108103118.56114393.94918378.36824277.35164162.491104117.77014493.47518478.05125272.24365160.910105116.99114593.00718577.73626267.33966159.361106116.22314692.54418677.42427262.62667157.846107115.46614792.08618777.11528258.09268156.362108114.72014891.63218876.80929253.72969154.908109113.98514991.18418976.50530249.52470153.484110113.26015090.74119076.20431245.47171152.089111112.54515190.30219175.90532241.56172150.721112111.84015289.86819275.60933237.78673149.380113111.14415389.43919375.31634234.13874148.065114110.45915489.01419475.02535230.61375146.776115109.78215588.59319574.73636227.20276145.511116109.11415688.17719674.45037223.90177144.270117108.45615787.76519774.16738220.70478143.052118107.80615887.35819873.88639217.60679141.857119107.16515986.95419973.60740214.60380140.684120106.53216086.55520073.330P=5a t（min） i（mm/min）tititititi13.063411.268810.8361210.6341610.51622.948421.251820.8291220.6301620.51432.841431.234830.8221230.6271630.51142.743441.218840.8161240.6231640.50952.651451.203850.8091250.6201650.50762.567461.188860.8031260.6161660.50472.488471.173870.7971270.6131670.50282.414481.159880.7911280.6091680.50092.345491.145890.7851290.6061690.498102.280501.131900.7791300.6031700.496112.219511.118910.7731310.5991710.494122.161521.105920.7671320.5961720.491132.107531.093930.7611330.5931730.489142.056541.080940.7561340.5901740.487152.007551.069950.7511350.5861750.485161.961561.057960.7451360.5831760.483171.917571.046970.7401370.5801770