Research On The Potential Of Rainwater Utilization And The Design Of Rainwater Landscape In The Park And Greenbelt

City Park in improving ecological cycle system of urban water have important and special role.Rainwater utilization project in C ity Park have public welfare and social influence,which belongs to the category of urban water resources and protection and construction of ecological environment.Consensus has emerged among international that rain for its economy,directness,and fundamental characteristics,will become the important way to solve the problem of water resources in the 21 st century.With increasingly serious problem of drought and water logging in city and big irrigation water consumption in C ity Park,however,the administrator doesn't use rainwater resources.What's more,urban public landscape system is going to upgrading and city park project of rainwater utilization and water saving is moving forward.The research of rainwater utilization potential,rain landscape design and construction and general rain technology in park green space has considerable necessity and significance.This paper mainly investigates the influence factors of rainwater utilization potential of six Shenzhen city park,such as topography,vegetation,water,etc.,and carried on the reasonable calculation theory of rainwater utilization potential.At the same time,designing the scheme of rainwater transport and rainwater storage facilities of the above-mentioned six cities park,calculates the realizable rainwater potential of six Shenzhen urban park.In addition,in this paper,a number of wetland park and rainwater garden demonstration park in Shenzhen and other cities were investigated,summarized the applicable types and forms of water landscape and wetland landscape in C ity Park to build the rainwater landscape,the rain water landscape application form basis and so uthern common aquatic and wet plant species.Main conclusions are as follows:(1)Rainwater utilization potential of Shenzhen C ity Park is tremendousShenzhen Futian district and Luohu district's average annual effective rainfall within nearly five years is 1744.64 mm and 1744.64 mm.Shenzhen city parks theoretically can collect 0.50 m3 rainwater runoff per square meter;Shenzhen city parks actually can collect 0.33m3 rainwater runoff per square meter in the design of rainwater utilization project.Shenzhen C ity Park's green space of every square meter is proposed to build 0.02 m of rain water transport facilities and has a 0.93 m3 of rainwater storage space(including natural water body).(2)Each factor's influence on the theoretica l potential of rainwater utilization in Shenzhen C ity ParkThe ratio of water area of dominated area is proportional to the rainwater utilization's theoretical potential;the ratio of natural mountain forest land area of dominated area is inversely proportional to the theory of rainwater utilization potential;Vegetation factors compared with the terrain factors,affecting urban park's theoretical potential of rainwater utilization is greater.(3)Each factor's influence on the realizable potential of rainwater utilization in Shenzhen C ity ParkThe area of water occupies a small part of the park,whose rainwater utilization potential almost free from the rain construction project.The water proportion of the park is larger,and the rainwater utilization potential is more reduced by the rain storage facilities and the less rain transport facilities will be constructed.(4)The landscape forms of waterscape can be used in the park green space are numerousRainwater landscape including staged waterscape and small/mini garden waterscape.The staged waterscape according to the size divided into two categories: 1)the large staged waterscape,including large-scale static water lake,pond,pool and rainwater wetland,etc.;2)small staged waterscape,including dry creek,grassed swales,small rain garden and subsided green space,etc.(5)Depending on the type of park area and water cleaning need to choose rain landscape formFrom the aspects of park area's types,rainwater landscape types can be installed in greening land include dry creek,grassed swales,small rain garden,subsided green garden,pool,well,Dripping spring,seepage spring(overflow spring),etc.;rainwater landscape types can be installed in Square land,the most common type is high water plant altar.From the aspects of water cleaning needs,rainwater landscape forms which are able to work(cleaning)the rainfall runoff include small rain garden,rain wetland,grassed swales,subsided green garden and rain cultivation pool(high planting altar),etc.