Research On Remaking And Design Of Green Space For "Sponge City" About Changde City Based On Low Impact Development

Under the background of development in traditional construction mode the urban environment is becoming more and more hardened. The phenomenons such as"see the sea in the city", flooding each raining, droughts and flood turn around in a short time, water pollution, urban heat island effect have already become the problems that can not be ignored in the process of urban development. Traditional rainwater pipeline mode can only rely on pipelines which called "Gray facilities" to collect for centralized treatment that cost too much but still can not solve urban rainwater problem basically. The sponge mode of urban construction and management which based on the LID theory proposed natural circulation of the "Green sustainable" new urban water management way to improve the water cycle efficiency and recover the urban natural elastic, so that rainwater in urban migration activities can be more ecological and natural. In sponge urban construction, the green space in urban as the most important composition part will be guided by the sponge city concept and it also has a great influence on sponge city construction. A variety of ways for the construction of green space and technical measures have constituted the urban green space system in sponge city. Changde in Hunan Province as one of the first national group in 16 pilot cities for sponge city construction considering of the characteristics of the present situation of the city and its green infrastructure advantages, in accordance with the requirements of national standard of urban green sponge transformation design and construction had conducted a series of exploration and practice:1) This paper summarizes the process of the development and evolution of the concept of the sponge City, demonstrates the correctness and necessity of the development of the city.2) This relationship between the construction of the sponge city and the urban green space had been proved out, and summarizes the new requirements of the construction of various types of green space under the requirements of the sponge city.3) This paper advised principles, objectives, measures and operation mode of the construction of LID sponge city in Changde.4) Through a series of examples, this paper shows the comprehensive strength and outstanding achievements of the construction of Changde sponge city.This paper tried to sum up the reasonable green space construction scheme to make the urban green space system to be a role in its ecological regulation effects.