The System Construction Of Urban Open Space For Rainwater Management Based On Network Analysis And DEM

Due to rapid urbanization and global climate change, lots of Chinese cities have to face many-urban problems, included urban waterlogging. In recent decades. The related theory and practice at home and abroad discusses the role of urban open space in urban waterlogging, urban open space as the city’s "regulation ponds" during heavy rainstorms. Based on this guiding principle, the significance of this study is to construct a city-level urban open space system for rainwater regulation and storage. to provide effective strategies for the new urban areas to solve urban waterlogging problem.This paper based on the multi-functional rainwater regulation and storage, through a study on the rainwater regulation and storage function of urban open spaces. with many tools such as GIS spatial analysis and network analysis, to determine the location of urban open space and its storage capacity. The paper is divided into four chapters. Chapter one introduces the research background, current situation, research object, research content, research methods. Chapter two is related theories reviews and construction method of urban open spaces. Summarize research content and method of urban open space and quantitative analysis method for location of open space. And determine the method of urban open space system construction, detailing its working procedures and steps:situation analysis-subject analysis-result analysis. Chapter three study the feasibility in the real case. Qinglong area of Nanjing as the study area, based on relevant data, establish the database, then use the function of data integration, spatial analysis in GIS. and finally get the location of urban open space in the region, as well as the rainwater regulation and storage capacity. The fourth chapter is epilogue, stating the method limitations of the urban open space system and summarizing the existing deficiencies and issues to further study.