论文部分内容阅读
根据经地面沉降订正后的1959～2005年海河闸站年极值最高潮位数据,运用Gumbel型和P～型计算方法求得不同频率年极值高潮位;根据历史上典型风暴潮淹没情景,在现有防潮堤的情况下,运用圣维南和薄壁堰自由出流等公式推求不同频率风暴潮进潮量;利用开发的无源和有源淹没程序计算不同频率风暴潮淹没范围。结果如下:天津市滨海新区出现频率为5%、1%和0.5%的年最高潮位分别达4.54m、4.92m和5.08m(大沽零点基面);现状条件下,3种频率风暴潮可能淹没的土地面积分别达km2、km2和118.50km2;淹没损失分别达1.79×108元、3.93×108元和5.06×108元。
Based on the data of annual maximum and maximum sea level of Haihe River Station from 1959 to 2005 after the land subsidence was corrected, the extreme high tide level at different frequencies was calculated by Gumbel type and P ~ type calculation method. According to the typical storm surge in history, In the case of the existing embankment, the influx of storm surge at different frequencies is deduced using the formulas of Shengweinan and the free flow of the thin-walled weir. The passive and active submerged procedures are used to calculate the submerged range of the storm surge at different frequencies. The results are as follows: The annual maximum tide levels of 5%, 1% and 0.5% of Tianjin Binhai New Area were 4.54m, 4.92m and 5.08m respectively (Dagu zero base surface); under the current conditions, the three types of frequency storm surge may The submerged land area is respectively km2, km2 and 118.50km2; the submerged losses are respectively 1.79 × 108 Yuan, 3.93 × 108 Yuan and 5.06 × 108 Yuan.