Study On The The Methord And Way Of Rainwater Resources In Zhengzhou Green Space

In the continuous development of city construction, the city rigid interface,such as roads,houses, increase a lot, the urban rainfall infiltration reduced,the rainfall run for short time, natural water cycle system is destroyed, the citywater environment is deteriorating.Based on the combination of urban green space and rainwater resources using, this paper researched the ways and methods of rainwater using in urbangreen space,and provided a new thought about the planning and construction ofurban green space and management of rainwater resources using.In this paper,the urban green space problem for rainwater resources unsufficient using was pointed out, expounded the relationship between urban green space and the effective use of rainwater resource,that are intercept rainfall, reduce runoff, increase rainwater infiltration,affect river confluence process and reduce the pollution of stormwater runoff. Classify the rainwater using facilities according to the its characteristics of and relation to urban green space.Discussed the study and practice of rainwater resource using in our country,described four ways of concave green,green roof,bioretention and rain garden that closely linked with urban green space and its conformation.The analysis of rainwater resources using in Zhengzhou green space show that in different elevation range,urban green space area, the number of green patch and catchment area has very significant positive correlation, and the correlation coefficient was0.928and0.991respectively. Then combined with time distribution uneven of rainfall, rainfall concentrated in Zhengzhou,keep the rainwater cycle as natural hydrological cycle for the principle, put forward to different green space types and corresponding reform measures and suggestions, in order to achieve the same green areas to enhance the efficiency of the rainwater collection and penetration.Finally,combined with the urban green space construction of water storage and transfer system,put forward the route that of rainwater using from roof to road and square, constructing rainwater saving system in urban green space continuously,try to construct ecological drainage network system in Zhengzhou,using it to alleviate the pressure of the existing drainage system, ameliorating urban water environment and relieving urban waterlogging disasters.