Cause Analysis on the Course Change of Tibet Niyang River´s Main Stream

Main stream of river changes frequently, and major trough swings often, which bring great danger and bad effects to the flood prevention and protection work even the regular life and property of local people. We take the Niyang River as an example, do deep research on the reasons why the main course in Bayi town changes frequently and the influencing factors. It reveals main mechanism of action of causes and brings out the related control and solving measures and scheme. The research result can guide the local water conservancy work and provide scientific references and basis for the changes of rivers´ courses and the control of the situation of related river in foreign countries.