The Urban Landscape Rainwater Utilization Research And Analysis

Urbanization became the trend of the development of the world today, the continuous development of city construction, make the town’s population increase, city water stress has become an increasingly important issue. In city construction process, the urban road, impervious facilities area houses a large increase, make the city underlaying surface changes, reduce the urban precipitation infiltration amount, make the rain flood peak value increases increases, the rain short confluence time, leading to city rainfall flood hazards intensifies, purpose disasters. Water quality deterioration, and the worsening ecological environment and so on many kinds of environmental damage. And without processing of natural rainfall for the pollution caused by the also nots allow to ignore, together with and urbanization corresponding population density high concentration, industrial worsening pollution, life pollution acceleration, caused the urban water environment is deteriorating. Therefore, in the cities with pollution and resources double properties of natural rainwater resources, in not be converted into usable water resources before, how these in flood season of wasted rainwater resources fully collection, reasonable processing and use up, variable for good, be a kind of important scientific research significance of research into the subject.Beijing Olympic park is located at the northern tip of the central axis, Park central area including axial landscape avenue, tree array area, square area, the shop is sinking garden, leisure garden, LuHuaOu, water system and non maneuvering lanes and other regions, The scale of the rainwater utilization system, and has become a city rainfall flood by using the engineering of the demonstration site.Papers to the Olympic park rainfall flood use demonstration project as an example, Beijing Olympic park in2005-2009year, month, day of rain material,, the system analysis and research. Analysis the characteristics of the Olympic park rainfall, especially to cause harm strong heavy rain in the time characteristics are analyzed, and reached the following conclusion:the Olympic area rainfall has concentrated, strength and concentration rainfall time of occurrence of the characteristics of the concentration, the rain is rainfall flood the main collection objects using facilities, heavy rain area to have short diachronic time characteristics. At the same time for the rain type characteristic also makes a preliminary analysis. In the rain on the mode of resource puts forward the related theory and method, and the rain water and reservoir of calculation, perfect the rain the theory of resources.