Study On Ecologycal Restoration Design Of Urban Rivers From The Perspective Of Landscape Infrastructure

With the deepening of urbanization,urban river ecosystems are facing a series of problems,such as storm and flood imbalance,serious pollution,insufficient ecological water use,ecosystem damage,and limited functions.The improper concept of river protection and utilization is the key to these problems.Therefore,by introducing the concept of landscape infrastructure,using theoretical deduction,GIS quantitative analysis and empirical research,this study systematically discusses the framework,strategy and practice of urban river ecological restoration design from the perspective of landscape infrastructure with Chongqing Xiaojia River as an example.In order to solve the ecological problems of Xiaojia River and realize its multiple values,it provides ideas for the ecological restoration design of other urban rivers.The thesis first sorted out the connotation,goals and scale of urban river ecological restoration,as well as the development process,related concepts,spatial patterns and characteristics of landscape infrastructure,and discussed the feasibility,core connotation and significance of landscape infrastructure concept to guide the urban river ecological restoration design.Secondly,the paper takes the Xiaojia River in Chongqing as an example to analyze the profile and existing problems of Xiaojia River from the dual scales of river basin and river reach.Then the paper constructs the urban river ecological restoration design framework from the perspective of landscape infrastructure from three aspects:restoration design goals,restoration design methods and technical routes.Finally,combined with the analysis of Xiaojia River,the hydrological process analysis and ecological assessment were carried out under the guidance of the design framework,and the restoration design strategy at the river basin and river reach scale was proposed.The main research results of the thesis are as follows:?The core and positive significance of the application of landscape infrastructure concepts to the ecological restoration design of urban rivers;?Taking the Xiaojia River in Chongqing as an example to analyze and summarize the problems existing in urban rivers;?Building a city from the perspective of landscape infrastructure The framework of river ecological restoration design;?The ecological restoration design strategy is proposed based on the empirical design of Chongqing Xiaojia River.