珠江口鸡抱沙附近地形冲淤演变研究

鸡抱沙位于珠江口伶仃洋喇叭湾湾顶,是伶仃洋内港口发展建设最快的地区。受自然水、沙及人类工程的影响,鸡抱沙附近的地貌形态发生了较大的变化。主要表现在:近百年来,蕉门河口由"潮优型"河口性质逐渐转变为"河优型"河口性质,凫洲水道则经历从决口→散乱→归股的由不稳定到稳定的变化过程,已成为蕉门口外的主泄洪道。而鸡抱沙和沙地区的大规模围垦,对保证凫洲水道和龙穴南水道稳定起了重要的作用。

Scour and silting evolution of topography around Jibaosha in the Zhujiang estuary

The Jibaosha is located at bayhead of the Lingdingyang in the Zhujiang estuary,which is the most rapidly developing region.Influenced by natural current,sand and engineering project.physiognomy has changed a lot around Jibaosha.It is for almost a hundred years,the Jiaomen estuary has changed by tide-primary to river-primary.The Fuzhou channel has had a change of burst-dispersion-straight.It has become a main flood channel of Jiaomen estuary.The extensive inning in Jibaosha and Masha has played a very important role for protecting the stability of Fuzhou and Longxuenan channel.