防洪標準復(fù)核報告

防洪標準復(fù)核報告某水庫位于xx城區(qū)東北25km處的龍泉鎮(zhèn)雷家畈村，攔截長江北岸柏臨河的支流院子河。水庫大壩壩頂高程262.00米，最大壩高29.6m，總庫容376×1料壩。根據(jù)《水利水電樞紐工程等級劃分及設(shè)2設(shè)計洪水復(fù)核某水庫所在的柏臨河支流某上無水文站，水庫自運行以來無水庫運行記錄資料某水庫原設(shè)計地理參數(shù)：流域面積：11.3km2，主河道長7.5km，河道比降89表2－1年份H1hH6hH24h50.464.223.336.550.831.177.589.145.988.842.947.863.165.91055.444.476.055.960.395.081.6217.4217.536.743.758.138.241.446.045.056.963.026.936.839.942.461.249.784.787.335.981.185.081.328.144.064.9200067.682.283.3平均50.985.898.6對H1h、H6h、H24h雨量進行理論頻率三點適線法計算，得結(jié)果如表2表2－2X(mm)CVP1=0.2%P1=3.33%H1h50.950.452.31146.23101.39H6h83.250.622.60330.50203.96H24h100.740.5823.15393.89238.35按某水庫所在位置流域中心，查《圖表》計算各頻率點暴雨量如表2－3所示。表2－3X(mm)CVP=0.2%P=3.33%P=5%H1h480.463.5154.08100.3291.2H6h0.533.5295.2H24h0.553.5421.3260.7231.0表2－4面深系數(shù)P=0.2%P=3.33%P=5%點雨量面雨量點雨量面雨量點雨量面雨量H1h0.98154.08151.08100.3298.3191.2089.38H6h0.986295.20291.10184.80182.20167.70H24h0.991421.30417.50260.70258.40231.00228.921h≤t＜6hHt面=H1面t1－n16h≤t≤24hHt面=tH24面24n2－1t1－n2項目頻率n1n20.2%0.6340.743.33%0.6560.755%0.6660.75f四時段雨型1234THt面h1h設(shè)Ri000000191.291.23.34002114.9623.763.51003131.633.190043.050053.71006163.347.223.93007169.766.424.482.78175.525.764.184.182.589180.775.254.824.823.23185.594.825.255.253.65190.074.486.426.424.82194.254.185.765.764.16198.173.939.61201.883.71205.393.5123.7623.7622.16208.733.3491.291.289.6211.923.19214.973.057.227.225.63217.92.932.812.8120220.712.812.712.7121223.422.712.612.6122226.032.612.932.9323228.562.532.532.530.93242312.442.442.440.85THt面h1h設(shè)RiIi00000016.2500243.66.57003225.7431.135.97004250.825.065.7120521.346.936.934.576291.157.337.334.977303.068.348.345.988313.777.87.85.449323.529.768.998.996.63332.518.999.769.767.4340.858.349.55348.657.88.35355.987.3321.3421.34362.916.9325.0625.0622.7369.486.5743.643.641.24375.736.25148.64381.75.9731.1331.1328.77387.415.71392.95.485.275.272.9120398.175.275.085.082.7221403.255.084.914.912.5522408.164.915.485.4823412.914.744.744.742.3824417.54.594.594.592.23(1)(2)(3)(4)(5)(6)THt面h1h設(shè)RiIi000000198.3198.313.74002124.7826.473.93003143.463.57004158.383.41005171.024.15006182.724.390.69077.185.015.013.298196.346.454.684.682.969202.215.875.45.43.68207.615.45.875.874.15212.615.017.187.185.46217.294.686.456.454.73221.684.39225.824.15229.753.9326.4726.4724.75233.493.7498.3198.3196.59237.063.57240.473.419.98243.743.273.153.1520246.893.153.033.0321249.923.032.922.9222252.842.923.273.2723255.672.832.832.8324258.42.732.732.73m1=1.64F0.231L0.131j－0.08n=0.259F0.25j0.20大、中洪水參數(shù)的綜合公式用于稀遇設(shè)計洪水，應(yīng)作非線性改正。對于50年一遇以下的設(shè)計洪水不考慮線性改正。因此在本次洪水復(fù)核過程中，對30年一遇洪水ip=HtR/tRtR=0.425F0.52(山區(qū)長形流域) Tt＞T時，Q0＝Qg T將地表徑流過程線和地下徑流過程線相疊加，即可得出設(shè)計洪水過程線，洪水過表2－10時段P＝0.2%P＝3.33%地表徑流地下徑流洪水過程地表徑流地下徑流洪水過程地表徑流地下徑流洪水過程00.000.630.630.000.440.440.000.410.4110.000.680.680.000.480.480.000.500.5020.000.720.720.000.520.520.000.590.5930.000.760.760.000.560.560.000.690.6940.000.810.810.000.590.590.000.780.7850.850.000.630.630.000.880.8860.890.000.670.670.000.970.9770.940.712.210.5080.984.240.754.993.30920.896.710.787.494.555.8122.5123.588.900.829.726.948.2928.1529.260.869.3427.0428.200.9050.910.9467.4468.6823.820.9824.8020.9422.67113.88115.1735.8736.8831.7633.58376.94378.2783.4584.5075.9077.82181.00182.37121.79122.87111.592.01113.6070.2171.63109.06110.1998.272.10100.3722.0223.4878.6079.7768.812.2071.012050.2151.4143.232.2945.52218.389.9330.5631.802.3928.50229.352.48238.049.688.572.58247.178.858.376.032.678.70253.574.735.884.002.776.77260.162.763.842.312.865.17270.012.652.964.34280.730.940.613.053.66290.360.880.303.44300.160.820.980.132.943.07310.070.770.840.062.752.81320.040.720.760.032.572.60330.020.670.690.012.402.41340.00.630.640.012.242.25350.000.590.590.002.102.10m—流域匯流參數(shù)；1/3；R24=H24面－22.53、設(shè)計凈雨總量h及地面徑流歷時T；Pn1mμR24hTk1k2k3k4QmQ0Cr0.20.6340.8143.53395.0297.20.5730.7540.334387.987.930.203.330.65698.30.8142.39235.90.590.7850.337229.805.540.2150.66689.380.8142.16206.42162.320.5980.7980.338203.615.050.21徑流過程，再計入基流Q0=0.22μ0.法求得設(shè)計洪水成果如表2－12。表2－12tiP＝0.2%P＝3.33%QiQ0Q(總）Q0Q(總）QiQ0Q(總）007.937.9305.545.5405.055.050.593.887.932.995.548.532.655.057.707.935.545.0558.207.9366.1341.365.5446.9036.655.0541.702.36256.077.93264.00156.265.54161.80138.455.05143.502.95387.987.93395.91229.805.54235.34203.615.05208.663.54271.597.93279.52165.465.54171.00146.605.05151.654.13182.357.93190.285.5499.775.05104.824.727.93124.3273.545.5479.0865.155.0570.215.3177.607.9385.5352.855.5458.3946.835.0551.885.9058.207.9366.1339.075.5444.6134.615.0539.666.4942.687.9350.6127.585.5424.435.0529.487.0831.047.9338.9720.685.5426.225.0523.377.677.9327.335.545.058.197.9323.459.195.545.058.267.936.895.545.058.857.767.936.895.545.059.447.767.934.605.544.075.053.887.932.305.547.842.045.057.093.887.932.305.547.842.045.057.070.007.937.930.005.545.540.005.055.05P瞬時單位線法推理公式法0.2%3.33%5%0.2%3.33%5%Q(m3/s)378.27122.87395.91235.34208.66W(104m3)403.10242.20227.6365.10230.80205.10積F較小，河長L較短時，n、k值極不穩(wěn)定，洪水計算成果會產(chǎn)生較大的誤差。推校核標準為100年一遇，此后經(jīng)過幾次項目資料來源3.33%0.2%Qm(m3/s)79年防洪復(fù)核20188年防洪復(fù)核229.2本次208.66235.34395.91水位（m）79年防洪復(fù)核260.32260.6788年防洪復(fù)核260.37260.75本次261.23261.87洪水總量W（104m3）79年防洪復(fù)核23638088年防洪復(fù)核305.4490本次205.1230.8365.1H24h（mm）79年防洪復(fù)核26041988年防洪復(fù)核273438本次231260.7421.33水庫洪水調(diào)節(jié)利水電樞紐工程等級劃分及洪水標準》（SL252－水位(m)234235236237238239240241242243244245246247248庫容(104m3)00.442.4154.167.2824.4733.0942.9854.466.7579.8294.15水位(m)249250251252253254255256257258259260261262庫容(104m3)109.98126.79153.42203.9225.7248.5272.45297.65324.4352.8384417.2mQ=mεb·H/2