Under The Function Of "Sponge City" Construction In Northwest Landscape Design Research

Under the background of rapid urbanization and global climate change, many cities face the grim problem of rain flood. Traditional simple negative way called "fast",which does not treat the rain as a valuable resource and make use of it. A lot of "grey" infrastructure damage the destruction of natural ecological system while reduce the ability to deal with rain flood,which lead to the status quo of the shortage of water and pollution,many adverse consequences have been in many cities in our country. Under the background of new era, it is urgent to alleviate urban rain flood problems,and the concepts and methods in treating the rain need to be changed.In this paper, based on the landscape design method in northwest,which aims to expand from way of landscape design in our country at the sight of the function of sponge city construction,and it has a positive significance to city sustainable development.Firstly,this paper analysis the landscape design development process on the function of sponge city construction,and concluded that the importance and the necessary experience of active function of rain flood, put the rain problems into level of the landscape design.Do the research on landscape situations of northwestern area on the represent of xi ’an, analysis the main problems,Secondly emphatically discusses the landscape design methods on the function of sponge city construction, namely how to carry out in the landscape design of rainwater runoff retention, osmosis, design method of purification and recycling. Proposed the landscape design strategy which is under the function target, describe the points and the methods of landscape design in the conditions of meteorology hydrology and site.Combining with the constituent elementsof landscape,discussed the approach of design in northwest region from the function of terrain design, waterscape design, plant design,and road design. Thirdly combine the theory with the practice depended on the case in Yulin Jufeng community,which case in the point of the paper.In this article, through the landscape design research on the function of sponge city construction, in order to expand the existing design concept,to strengthen the awareness of "sponge" in landscape design,to combine the landscape design with the technology,and to the promote the directions of the functional in landscape design.