Study On Fuzzy Optimization Method And Site Conditions Of Riparian Plants In Xinghua River Of Zhangqiu City

With the construction of urbanization, original hydrological characteristics of the river system have been changed. More than 70% of the rainfall runoff discharge, resulting in deterioration of water ecology, pollution of water environment,shortage of water resource and lack of protection of water security. Waterfront area has the comprehensive function of drainage, water purification, water absorption, water storage and water seepage. However, the vegetation selection index system of the waterfront has not been improved,the survival rate of the vegetation is low due to the improper maintenance. These two aspects are worth further study.This paper take Xinghua River in Zhangqiu for instance to analyze the process of plant selection in different parts of the waterfront area. To sum up, the research mainly includes the following aspects:(1) According to the diffence characteristics and functions of waterfront, waterfront is divided into three parts. At the same time, optimization. determine the optimization principle and method of waterfront plants.(2) Determine the comprehensive evaluation system for different parts of the plant by considering plant adaptability, ecological adaptability, landscape function and high economic value. Analysis the calculation method of each index. Establish the comprehensive evaluation system of vegetation optimization based on the analytic hierarchy process and fuzzy comprehensive evaluation method. Determine the suitable method for different regions of the northern waterfront plant optimization.(3) Finally, this paper applies the results of research to the vegetation optimization of the Zhangqiu city session of Xinghua River. On the basis of the primary vegetation election, determining the suitable plants in different areas of the waterfront through the plant optimization and comprehensive evaluation method.(4) By analysising the relationship between plant roots and soil to determine good characteristic index of the response of plant growth, such as length of root, number of lateral root and rhizome size. Determine suitable density interval needed of plant growth by experiment for late plant maintenance.