Study Of Sponge Urban Planning Construction Of Yuxi New Town, Yizhang, Hunan Province

With the speeding up of urbanization, urban construction safety problems of water environment;Sponge city construction is to make the city back to nature, on the basis of low impact development building technical rain, reduce formation of waterlogging all sorts of urban problems such as water. Drainage system, the biggest difference between with the traditional city lies in the "return to natural water cycle". Sponge breakthrough the traditional urban construction " given priority to with line" urban stormwater management concept, through infiltration, hysteresis, storing, net, use, and many kinds of combination of the integrated use of ecological technology. Comprehensive analysis of problems faced by rainwater in urban development, based on the concept of low impact development.starting from the source control, for low and medium influence development of urban planning and design of rainwater system provide the guidance of the theory and method on; The construction of a comprehensive system based on the low impact development process of site planning and design; Through the drainage system of the low impact development build sponge city can solve the current urban waterlogging disasters, storm runoff pollution from such outstanding problems as, shortage of water resources.Yuxi new town is planning and construction of Yizhang county,Hunan province. Yizhang county is a high incidence zone rain flood, in order to avoid urban construction of yuxi city problem such as the rain flood happened in the future, and well of urban rain flood management; It can avoid the phenomenon of "the sea", the city disease concept in yuxi city need to sponge construction of city planning and design, will affect the rain low development technology used in new town construction. In this paper, based on the current construction of yuxi city development needs, based on the related theory of sponge urban construction research and literature review and summary, draw lessons from the low impact development of urban construction, Sponge rain flood management put forward a set of cities, to solve the rain waterlogging, rain, surface runoff pollution of urban rain flood management problems, such as sponges urban design.Appropriate chapter yuxi new town sponge city planning and construction.Through to the new town, underlying surface conditions of construction site, the status quo analysis of the runoff coefficient, and the ground water source, according to the requirement of the sponge urban construction of yuxi city put forward the corresponding planning design goals, through the urban road, square and green space, residential area and construction, surface drainage and other underlying surface rain flood control system planning and design. On this basis, the construction of yuxi city sponge city rainwater infiltration, involved in the collection, purification and utilization, emissions, and discusses the water safety system and instructions, to determine the yuxi city urban planning and construction of rainwater sponge overall control objectives; At the same time, of urban construction in our country, and improve the urban environment through the beneficial exploration, play the part of demonstration role for China's city construction and development.