Abstract:

The aim was to study the importance of the structure and function of riparian vegetation at middle and low reaches Shiyang River for ecology manager and restoring. The middle and low reaches of Shiyang River were divided into richness runoff and run dry where the structure and space distribution of riparian vegetation at different distance from river bed were investigated, then the types, spatial pattern and function of riparian vegetation were analyzed for management and restoration ecological environment. The result showed: the width of riparian vegetation, which could be classified into 18 associations, was 200-500 m, and the 80% of constructive species of region plant community were fund at riparian place. It was distinct that types of vegetation orderly change with the distance from river bed, as well as decrease in exponent of coverage rate of riparian vegetation. The riparian vegetation not only had special humidogene plants, such as tree and marsh plant, and native plant communities, but also joined the plots of landscape at local area to make up a stable regional ecology system. The belt of riparian vegetation protected riverside and stabilized river bed to control disaster in runoff and sand-wind. The riparian vegetation also gave a basis to defend oasis by breaking the wind and a comfortable environment for local people.