Study On Waterfront Landscape Design From The Perspective Of Sponge City In Chongqing Banan District

As the transition zone between urban space and ecological space,urban waterfront is an important sponge and ecological leisure space.In recent years,in the process of rapid urbanization,high-intensity urban construction and development has occupied the original natural ecological space of the city.The hardening rate of urban underlying surface is higher and higher,and the rainwater runoff is larger and larger,which causes frequent waterlogging in urban rainstorm season.Especially,the ecological environment of Waterfront is deteriorating day by day,the river channel is silted,the drainage is not smooth,and the hydrophilicity,experience and ecology of waterfront are seriously lacking.Therefore,strengthening the research on sponge landscape construction of urban waterfront is helpful to realize the management of "infiltration,stagnation,storage,purification,use and drainage" of urban rainwater and the landscape and ecological construction of urban waterfront.This paper takes the waterfront of Banan District of Chongqing as the research object,based on the relevant theoretical research and current situation investigation,based on Google Based on the concept of "sponge city",the remote sensing image and topographic map extracted by earth are analyzed and evaluated by using Arc GIS and Auto CAD software,and the weight of influence factors is obtained by using AHP.Then,the suitability evaluation results of sponge construction in the study area are obtained by overlapping factor weights through Arc GIS According to the results,the sponge facilities layout and sponge landscape design methods of architecture,road pavement,green space and water body are proposed.Through the research of this paper,the following research results are formed.(1)Based on the research status of relevant theories at home and abroad,combined with the analysis of typical cases and the concept and content of "sponge city" and urban waterfront landscape,this paper discusses the design method of waterfront landscape in sponge City,that is,the sponge design of urban waterfront landscape is mainly carried out from the macro overall and micro special levels,and the macro overall is mainly from the regional and waterfront overall perspectives The starting point is to carry out the overall and regional planning and design to build thesponge construction system of urban waterfront;while the micro individual takes the local or a single site of urban waterfront as the foothold,taking into account the function and landscape,and optimizing the special reconstruction measures of sponge.(2)Based on the construction requirements and functional characteristics of various technical measures of sponge City,in line with the construction principle of ecological priority and local conditions,taking elevation,slope,ecological sensitivity,underlying surface,sink flow and water buffer area as the basic evaluation factors,the suitability evaluation system of sponge construction in urban waterfront area was constructed by using Arc GIS spatial analysis method and analytic hierarchy process.Based on the evaluation of the suitability of sponge construction in Banan District of Chongqing,the score from 1 to 10 is calculated.The higher the score,the more suitable for sponge construction.Based on this,it is divided into sponge development and construction zone(7-10 points),sponge construction buffer zone(4-6 points)and sponge construction protection area(1-3 points),to guide the construction of sponge system and layout of various technical facilities.(3)According to the theoretical research foundation,the suitability evaluation results and construction zoning of sponge construction in waterfront area,guided by the concept of sponge City,and taking "Green Necklace-Waterfront Landscape interwoven with city and ecology" as the spatial layout concept,the overall planning of sponge landscape,the construction of sponge system,and the construction,road pavement,green space,water body,plants and other aspects are emphasized According to local conditions,the corresponding sponge landscape design method is put forward.