珠江口鸡抱沙附近地形冲淤演变研究

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

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。

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.