Research On Ecological Restoration Of Urban River Landscape From The Perspective Of GI Theory

As an important part of the urban ecosystem,the river channel coordinates the relationship between the city and nature,and serves humanity.Its rationality and scientificity directly affect the quality of urban construction and economic development.At present,the guiding theory and practice of urban river ecological restoration in China are relatively backward compared to foreign countries,and the current status and demand of rivers are out of touch.Therefore,the urgent need of cities can adapt to the guiding theory and practical methods of ecological restoration of river landscapes in order to create a "Shuiqingshan" provides theoretical and methodological support.With the increasing development and improvement of the Green Infrastructure Theory(Green Infrastructure),it is widely used to solve urban environmental problems.The research on the ecological restoration method of urban river landscape based on GI theory is the exploration of effective methods to solve this problem.Applying the green infrastructure theory to the restoration of urban river courses,helping to improve the urban or regional aquatic ecological environment.Under the background of aquatic ecological security and pollution,urban river courses are no longer just fragmented event venues,but a continuous Spatial mode and the place where different ecological service functions are played under this mode.In terms of theory,this paper analyzes the guiding significance and limitations of existing theories on urban river ecological restoration by summarizing the GI theory and research status of river ecological restoration;through the investigation and analysis of the current situation of river landscape in Hefei City and the relevant stakeholders Research and interviews,on the basis of summarizing the ecological problems of river landscape,emphasize that the essence of ecological restoration of river landscape is the restoration of river ecosystem,and put forward the overall framework of restoration;through the ecological continuity index calculation model,the urban river landscape is continuous Quantitative analysis and research,from macro to micro level,summarized the problems and entry points of the river landscape;in practice,through the comparison and screening of a single river with research potential as a specific research object,the introduction of GI theory to carry out landscape ecological problems Analyze and summarize,propose the restoration process of urban rivers,identify a single river as the network control point(Hubs),connect the surrounding wetland parks and ecological parks and other wetland patches to form a circulating water ecosystem,enrich the biological habitat,increase biodiversity,To promote the self-purification of water bodies,and at the same time,by increasing the connectivity of the river,the pressure of the rain and flood of the river is reduced.The core content of the GI theory is the landscape corridor that connects the material and energy exchanges of biological communities,and aims to realize the self-design function of the river-scale ecosystem of the river basin under minimum human intervention.The potential relationship between them,to solve the current problems faced by urban rivers from the perspective of compensatory restoration,is of great significance to the realization of ecological civilization and beautiful China.