论文部分内容阅读
珠江口是在古珠江溺谷湾的基础上,因珠江水系泥沙的不断堆积和珠江三角洲的发育而逐渐形成的。近期珠江水系平均每年有8,336万吨悬抄,大约8,000万吨溶解质和少量底沙进入珠江口。这些泥沙大部分沉降在珠江各河口湾水域,它们于较古老的陆相地层(古河流相或古风化壳)之上堆积成一套浅地层体系。但珠江口地形复杂,各河口或河口湾的动力背景和泥沙运动不尽相同,因而其沉积环境和沉积特征亦各有所异。
The Pearl River estuary is formed on the basis of the ancient Pearl River drowned valley, due to the continuous accumulation of sediment in the Pearl River and Pearl River Delta. In the recent Pearl River system, there are an average of 83.36 million tons suspended annually, with about 80 million tons of dissolved matter and a small amount of sediment entering the Pearl River Mouth. Much of this sediment settles down in the estuarine waters of the Pearl River and they accumulate as a shallow formation over the older continental facies (Furukawa or ancient weathering crust). However, due to the complex topography of the Pearl River Estuary, the dynamic background and sediment movement of the estuaries or estuaries are different, so the sedimentary environment and sedimentary characteristics also vary.