Sediment and pollutant transport modelling of rivers and coastal waters

这项拟议的研究包括两个部分：第一个部分是对天然河流中泥沙混合物运动的调查。疏松河床沉积物的运动随时间和空间而变化。它经常导致河道侵蚀/淤积，增加河流洪水风险，破坏鱼类栖息地。第二部分是连接海峡和航道的逆流分层流体交换研究。交换流可以将氧气、营养物质和污染物带进或带出港口、湖泊或沿海地区。因此，交换流量具有重要的水质和生态意义。

This proposed research has two components: The first component is the investigation of the movement of a sediment mixture in natural rivers. The movement of loose riverbed sediments varies with time and space. It frequently leads to channel erosion/sedimentation, increase of river flood risk, and destruction of fish habitat. The second component is the investigation of counter-flowing, layered fluid exchange in connecting sea straits and channels. Exchange flow can carry oxygen, nutrients and pollutants into or out of a harbour, a lake or a coastal region. Therefore, exchange flow has important water-quality and ecological implications.