大梅沙河道河道流量水位

（1）設(shè)計(jì)流量大梅沙河不同設(shè)計(jì)頻率流量如下:河流名稱斷面位置集雨面積（km2）不冋頻率設(shè)計(jì)洪峰流量（m3/s）P=1%P=2%P=5%P=10%P=20%P=50%T=100年T=50年T=20年T=10年T=5年T=2年大梅沙河環(huán)梅路箱涵2.5498.989.276.266.65640.7（2）設(shè)計(jì)標(biāo)準(zhǔn)根據(jù)現(xiàn)有相關(guān)規(guī)劃，大梅沙河設(shè)計(jì)防洪標(biāo)準(zhǔn)為50年一遇防洪標(biāo)準(zhǔn)。（3）計(jì)算結(jié)果本 次 工 程 整治河 段現(xiàn)狀河道斷面在設(shè)計(jì)標(biāo)準(zhǔn)（50年一遇防洪標(biāo)準(zhǔn)）下設(shè)計(jì)水位及設(shè)計(jì)斷面在不同設(shè)計(jì)標(biāo)準(zhǔn)下水面線計(jì)算結(jié)果如下表：樁號(hào)現(xiàn)狀斷面設(shè)計(jì)水位(2%)/m(Q=89.3)設(shè)計(jì)斷面設(shè)計(jì)水位(2%)/m(Q=89.3)設(shè)計(jì)斷面設(shè)計(jì)水位(5%)/m(Q=76.2)設(shè)計(jì)斷面設(shè)計(jì)水位(10%)/m(Q=66.6)設(shè)計(jì)斷面設(shè)計(jì)水位(20%)/m(Q=56)設(shè)計(jì)斷面設(shè)計(jì)水位(50%)/m(Q=40.7)現(xiàn)狀河底/m左堤/m右堤/m備注07.787.907.637.327.176.966.5410.9812.82整治起點(diǎn)207.637.607.47.277.076.725.529.3412.52417.427.357.237.086.906.594.631212477.307.267.197.076.886.584.638.4112.35807.087.056.96.876.766.474.689.559.5592.637.046.956.836.796.696.414.569.019.851406.956.886.766.656.526.264.5212.318.211786.806.766.636.576.436.194.58.318.32217.46.716.676.556.516.376.144.788.177.852406.666.596.496.406.266.034.352606.616.586.486.386.266.064.728.17.442806.606.576.486.386.256.054.658.087.443006.566.576.426.326.195.984.58

樁號(hào)現(xiàn)狀斷面設(shè)計(jì)水位（2%）/m設(shè)計(jì)斷面設(shè)計(jì)水位（2%）/m設(shè)計(jì)斷面設(shè)計(jì)水位（5%）/m設(shè)計(jì)斷面設(shè)計(jì)水位（10%）/m設(shè)計(jì)斷面設(shè)計(jì)水位（20%）/m設(shè)計(jì)斷面設(shè)計(jì)水位（50%）/m現(xiàn)狀河底/m左堤/m右堤/m備注3206.506.486.326.226.095.884.668.327.293356.436.436.286.186.055.854.628.357.333606.366.356.196.105.975.774.728.547.223806.156.145.985.895.745.544.314006.046.045.875.785.635.434.448.326.664205.905.885.725.635.475.294.308.216.54405.315.335.15.024.704.553.398.226.34705.015.014.734.674.134.082.518.316.3整治終點(diǎn)，環(huán)梅路箱涵注：文中所列樁號(hào)與《大梅沙河河道治理及景觀改造工程斷面圖》中所列樁號(hào)一致。根據(jù)現(xiàn)行有關(guān)規(guī)劃，大梅沙河的防洪標(biāo)準(zhǔn)為50年一遇。設(shè)計(jì)河道斷面情況下，50年一遇洪水標(biāo)準(zhǔn)下，各斷面最大設(shè)計(jì)流速如下：樁號(hào)設(shè)計(jì)斷面設(shè)計(jì)工況流速(2%)/m/s(Q=89.3)01.86201.95 :413.47473.50803.9992.634.331404.511