Analyze Of Channel Change In Yalujiang River Estuary After Hushan-Boundary River Between China And North Korea

The Yalujiang River lies in the border of China and North Korea. Biggish change has took place in the riverway of the Yalujiang River mouth since the reservoir called ShuiFeng was constructed in 1943., which is from the Tiger Mountain to the sea-river boundary, about 62km. It also makes the river model of the Yalujiang River mouth transform from the old type of the branch of a river to the singleness riverway and tiny curve type. The North Korea makes the most of the characteristic of the riverway evolution, and develops a series of projects, as a result of it, the riverway is quite changed in the tideway movement process of the main sea-route, the western aqueduct, of the Yalujiang River. The western aqueduct was over shipped and deposed due to silt in the 1970s, so the side of China lost the launch out of the Yalujiang River, and it continues to fill up currently.It cries for research of the river evolution law of the Yalujiang River mouth to maintenance the national defence safety between the borders of China and North Korea districts and control country area loss, to resume Chinese launch out in the Yalujiang River, which offers the necessary technology support for fathering esynthetically the Yalujiang River mouth.The Yalujiang River Estuary belongs to a typical tidal channels, and thus the seaward channels see frequent deposition and erosion, and continent beach transfers frequently. The runoff and tide as well as the confluence of flood and seawater cause extremely unstable river terrain and riverbed changes, and it is not terribly stable in the part of riverway charge and silt. Contraposing the complicated characteristics of the Yalujiang River mouth such as landform, hydrology, mud and sand, tide movement. This thesis adopts two dimensions water-sand model under the operation together of tide and water flow to calculate and analyze and research. And this paper calculates and researches the conditions of the reach's flow field and mud and sand's transformation and movement, and it analyzes the main factors why the riverway bank line in the lower reaches of the Yalujiang River changes, and makes a research about the riverway evolution...