珠江河口磨刀门马骝洲水道两岸防洪(潮)体系提升研究

Research on improvement of flood and storm-surge prevention system in Maliuzhou Waterway at Modaomen estuary of the Pearl River

受201713号台风“天鸽”、201822号台风“山竹”引发的高潮大浪影响,珠江口磨刀门马骝洲水道两岸受损严重,因此对防洪(潮)体系提升提出了更高的要求。以马骝洲水道为研究区域,通过构建珠江河口整体及马骝洲水道局部二维潮流数学模型,选取“2005.6”洪水、“2002.6”中洪水、“2001.2”枯水和“9316”风暴潮(1993年9月16日0:00至9月19日20:00总时段为88 h)共4组典型水文条件,对两岸加固提升后的水域河势情况进行分析,分析结果表明,堤防加固提升后水动力流路清晰、流态顺畅,构建的数学模型对珠江河口磨刀门水动力模拟具有良好的适应性,防洪(潮)体系提升方案对河口地区具有指导性意义。

Affected by the high tide and big waves caused by the super typhoons"Hato"and"Mangosteen",both sides of the Maliuzhou Waterway in Modaomen of the Pearl River Estuary were seriously damaged,so higher requirements were put forward for the improvement of the flood prevention(tidal)system.In this study,the Maliuzhou Waterway was taken as the research area,by constructing a two-dimensional tidal flow mathematical model for the entire Pearl River Estuary and the local Maliuzhou Waterway,four groups of typical hydrological conditions including flood"2005.6",moderate flood"2002.6",low water"2001.2"and"9316"storm surge(the total period is 88 hours from 0:00 on September 16 to 20:00 on September 19,1993)were selected to reinforce the two banks.The river situation in the water area after the lifting is analyzed.After the embankment is reinforced and lifted,the hydrodynamic flow path is clear and the flow pattern is smooth.The mathematical model constructed in this study has good adaptability to the hydrodynamic simulation of Modaomen in the Pearl River Estuary,and the improvement plan of the flood prevention and tide system has guiding significance for the estuary area.