Numerical Analysis of the Influence of Sea Level Rise to Changjiang Estuary Deepwater Navigation Channel Area

Abstract

The study used MIKE21 to establish a two-dimensional mathematical model of Changjiang Estuary, doing a numerical simulation about the changes of the velocity along the South and North Passage and the flow spilt ratio of them with different ranges of sea level rise. The results show, with sea level rise, in the North Passage, the rise and fall velocity will increase from beginning to middle, and will reduce at outside, and the flood flow will enhance, the ebb flow will weaken, so it will result in fall deposition here; in the South Passage, the rise and fall velocity will increase at beginning, the rise velocity will reduce and the fall velocity will increase from middle to outside, and the flood flow will weaken, the ebb flow will enhance, so the river will be scoured, it will be conducive to the rivers development here.