Northwest Arid Area Urban Green Space System Planning

The arid zone which in the northwest China includs xinjiang region, chaidamu basin in qinghai, the hexi corridor in gansu province and the west of helan mountain area in Mongolia, because of continuous development of economy and destruction of environment, the negative influence of all kinds of environmental damage is coming, such as sandstorm, soil erosion, soil desertification, but with the improvement of environmental consciousness and ecological consciousness,human need more green area of city, therefore, It has become one of the premise to be a healthy city that coordinat relationship between people and the environment, between economic development and environment, so urban green space system is an effective way to relieve all kinds of urban environmental problems.This article based in urban green space system relevant theories,and studied the development history, research progress,case analysis of urban green space system planning at home and abroad, combined with features of shanshan county in the northwest arid areas,such as drought climate, the lack of water resources, serious soil salinization, vegetation growth difficulties;and many areas are located at the edge of the desert that are highly affected by the dust,Then I put forward suitable methods for arid shanshan county,And they laid a preliminary experience and reference sample for planning of green space system in our country northwest arid areas.Main conclusions are as follows:(1) on the basis of analysis about the present situation of shanshan county green space, put forward some overall green space system layout.such as the "sphere", "regional ecological reconstruction ring", "plate", "ecological reserve area", "corridor"- "regional ecological corridor" that formed in the county; ―green ring around‖, ―group space‖ formed aroud County(2) according to the situation of shanshan county green land in arid areas, put forward some measures suitable for shanshan county, the county is given priority to with local tree species, we can introduce foreign drought-resistant trees appropriatly combined with the water conditions, the green nature and other, we must adjust measures to local conditions in the choice of tree species.(3) County is given priority to with natural water irrigation, protect existing water, wetland, etc.; The county with the nature of the land and green space landscape requirements, using engineering water-saving measures, reasonable irrigation pipe network layout.