Ecological Mode Of Comprehensive Utilization Of Rainwater In Sponge Cities Of Southern Rainy Areas

In recent years,due to the rapid economic development in the southern region,the scale of urbanization is developing faster and faster,and a series of water resources problems have begun to become prominent.The city has repeatedly suffered from the floods and disasters that have been shown by the floods.The city faces the fragile resistance to extreme weather,and the sustainable development of the city is in need of new water use ideas and development models.In order to solve the main contradiction between urban rainfall drainage and urban water shortage,China put forward the concept of sponge city construction.In the development and construction of the city of Nanning,one side is the natural disaster caused by abundant rainfall,and the other is the shortage of water resources in the process of urban water construction.How to solve the contradiction between the two?In this paper,the ecological model of comprehensive utilization of rainwater in the rainy areas of southern China is taken as the key research object.Taking the construction of sponge city in Nanning as an example,the theory and practice of comprehensive utilization of rainwater resources in sponge city of Nanning are expounded,and the ecological model of comprehensive utilization of rainwater resources is carried out.The research and discussion proposed the corresponding coping strategies.The full text is 38,000 words and is divided into seven chapters.The first chapter is introduction.The background,content,purpose and significance of the research are introduced.The second chapter introduces the research progress and practice of sponge city.First of all,the research progress and practice of foreign sponge city construction are introduced in detail.Secondly,it introduces the research progress and practice of domestic sponge city construction,and introduces the practice of sponge city construction in Nanning in terms of project implementation,district construction effectiveness,model innovation,institutional mechanism construction,capital use and management.The third chapter introduces the theory and practice of comprehensive utilization of rainwater resources in sponge cities in China.The role and significance of the comprehensive utilization of rainwater resources were expounded,and the comprehensive utilization characteristics of rainwater resources in the north and south of China were compared in detail.The fourth chapter introduces the basic situation of Nanning city and the general situation of sponge city construction.It also deeply studies the main problems existing in the comprehensive utilization of rainwater resources in Nanning sponge city,and puts forward the overall strategy of comprehensive utilization of rainwater in Nanning sponge city.The fifth chapter comprehensively introduces the comprehensive utilization classification and ecological model of rainwater resources in the sponge city of Nanning.This chapter analyzes the comprehensive utilization classification and ecological model of rainwater resources in the sponge city of Nanning according to the different types of new districts,old urban areas and park green areas,and analyzes the construction effects and rainwater utilization patterns of each area.The sixth chapter summarizes the urban characteristics and ecological problems of the rainy area in the south.It summarizes the experience of the comprehensive utilization of the rainwater in the sponge city of Nanning,and proposes countermeasures for promoting the comprehensive utilization of the rainwater resources in the sponge city in the southern rainy region.The seventh chapter is the conclusion.This paper summarizes the research on the comprehensive utilization of rainwater resources in sponge city,and explains the innovation of this paper.Rainwater harvesting and utilization is one of the important technical choices in the construction of sponge cities in rainy areas in the south.This paper studies the ecological model of rainwater utilization in sponge city construction in southern rainy areas,analyzes the collection routes and different application modes,and alleviates urban water.Resource pressure and promoting the efficient,comprehensive and comprehensive utilization of China's water resources are of great significance.