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1 河流概况莺哥咀位于西北江三角洲水道上,主要水量来自西江。西江是珠江流域的主流,流域内水量丰富。从梧州至中山市莺哥咀水位站河流总长270多km。上游各水文站至莺哥咀站洪水传播时间分别为:梧州30～32h,高要11～12h,马口6～7h。汛期占西江马口站总量的28.6%的洪水经磨刀门出海,16%的洪水经横门水道出海。莺哥咀地处西、北两大江的下游,受横门口潮水影响(潮水汇流时间正常约需2h),属双向流河道,水文测报较为复杂。2 洪水过程特征“98·6”西江洪水是继1994年特大洪水以来所罕见,洪水的特征:范围广、水位高、持续时间长;西江上游的柳江、桂江、郁江、浔江、红水河均同时发生大洪水;广西梧州站洪峰水位26.51m,超100年一遇洪水位,我市莺哥咀水位站最高水位5.15m,也超过100年一遇;小榄水道、鸡鸦水道、洪奇沥的浪网、黄圃、坦背、港口、中下南等洪潮地区的水位超过1994年最
1 River Overview Yingge Tsui is located in the Northwest Delta waterway, the main amount of water from the Xijiang River. Xijiang River is the mainstream of the Pearl River Basin, the basin is rich in water. From Wuzhou to Zhongshan City, Yingge Tsui water station total length of more than 270 km river. Upstream of the hydrological station to Yingge Tsui station flood propagation time were: Wuzhou 30 ~ 32h, high to 11 ~ 12h, horse mouth 6 ~ 7h. During the flood season, 28.6% of floods, which account for the total amount of Xikou’s Meikou Station, went to the sea via Shaodongmen, and 16% of floods went through the Hengmen Waterway. Yingge Tsui is located in the lower reaches of the two major rivers in the west and north of China. Affected by the tide of the cross-gate (the convergence time of the tidal current is about 2 hours), it belongs to a two-way flow channel, and the hydrological forecast is more complicated. Characteristics of flood process “98.6 ” The flood in the Xijiang River is a rare flood since 1994, with a wide range and high water level and long duration. The Liujiang River, Guijiang River, Yujiang River, Hongshui River flood occurred at the same time; Guangxi Wuzhou station flood peak 26.51m, over a hundred years of floods, the city’s Yinggezui water level station maximum water level 5.15m, also more than 100 years a case; Siu Lam waterway, Watercourses, Hongqi Lek net, yellow nursery, dorsal, ports, the lower reaches of the South and other flood areas more than the water level in 1994