Research On Rainwater Harvesting And Utilization Technology Of Real Estate Construction Projects Based On LID

In recent years, with the advance of the urbanization process in China, many cities in the flood season have undergone varying degrees of waterlogging, causing heavy losses to people’s lives and property. Real estate development and construction activities on the transformation of the original natural surface reduces its permeability, ability to absorb rain, urban waterlogging has become a major cause of frequent occurrence. Pay attention to the rapid development of urban soil and water conservation, both to ensure the environmental safety of the process of urbanization in ecological, but also on real estate development and construction projects in stormwater runoff Catchment use has played a great role in promoting. At present, a lot of development and construction projects, rainwater harvesting and utilization measures are being well exploited. Sponge urban concept offered to provide theoretical guidance for the application of these technologies, to promote the promotion of these technologies. This paper will summarize these technologies, classify summarized the main points of its implementation, the applicable conditions.For the promotion of rainwater collection, storage and utilization technology of practical application, for Chaoyang District Cui Ge Zhuang Xiang big Wangjing village 2 is the promotion of rainwater collection, storage and utilization technology of practical application, aiming at the Chaoyang District Cui Ge Zhuang Xiang Da Wangjing Village area 2 period Metro Center Business District real estate development project, within the project area were designed different rainwater collection, storage and utilization measures, including the International Convention and Exhibition Center and the center for the arts of roof rainwater utilization system, Central Park and large public sinking greenbelt and semi permeable Lake Plaza, parking and permeable pavement. Then was used to calculate the various measures after the implementation in the project area storage and detention and infiltration of water, using SpongeBob urban construction technical guidelines "provisions of the relevant indicators of low impact development techniques in the project area to evaluate the implementation effect, further analysis of the rainwater collection, storage and use technical measures to real estate projects bring economic benefit and ecological environment benefit, starting from the angle of sponge urban construction, low impact development concept, project area of rainwater resources utilization effect evaluation, conclusions are as follows:Through green roofs, rooftop rainwater harvesting facilities, green area sunken transformation, squares, car parks, pedestrian permeability space transformation, an additional pool of rainwater harvesting rainwater storage and other facilities in the area real estate projects to reduce the source of water harvesting surface runoff, the bus halfway infiltration, detention storage, diversion, bus terminal to collect runoff, layers of control, forming a production flow from the project area and then to the end of the bus halfway complete control of rainwater catchment systems use technical measures to maximize the elimination on the spot of rain runoff, so that the total area of real estate projects outside the discharge stormwater runoff before similar development and construction, stormwater control the use of the relevant index reached a "sponge city construction technology Guide" requirements, to achieve hydrological characteristics before and after the development of the project area to maintain a substantially constant low influence on development objectives, the project will affect the hydrological characteristics of the area to a minimum. Based on rainwater harvesting sponges urban construction system will use technical measures of real estate projects bring good economic and ecological benefits, from the point to the surface, promoting the development of the urban system within the city limits sponge and bring good economic as the whole city and ecological benefits.The ultimate goal of this study is to provide guidance on rainwater harvesting and utilization of real estate project application and implementation of technical measures.