Study On Transformation Design Based On Landscape Ecology Of City Drainage Channel In Lanzhou

Water is the source of life. It is the fundamental condition of human survival anddevelopment. It is also a vein of life of urban development for the city. In the basin of YellowRiver, the per capita possession of water resources is only a quarter of the country, the unitamount of water of arable land less than one fifth of the country.Lanzhou is located in the upper reaches of the Yellow River in the Loess Plateau, locatedin China’s land territory geometric center. It is only the capital city which the Yellow Riverthrough. Lanzhou is located inland, belongs to the middle of cold temperate semi-arid area,average annual rainfall is324.9mm. The rainfall usually concentrated in the July toSeptember which accounted for over50%of the annual rainfall precipitation. But the annualaverage evaporation reached1448mm. Although Lanzhou drought phenomenon is prominent,but water resources of the entry is rich. The Yellow River includes tributaries HuangShuiRiver, Datong River and Zhuanglang River into the flow of nearly34billion m3.Firstly, there are37city drainage channel field researched in both north and southmountains of Lanzhou. Based on the relevant data about the Lanzhou city flood dischargetrench in recent years, summarizes the existing problems of Lanzhou city drainage channel atthe present stage. It will be the basic information for next study.Secondly, the paper discusses the realistic basis that drainage channel transformation ofLanzhou city, which cited Lanzhou ecological water planning and "Sanshui Huiyuan bud"catchment technologies. In February18th,2014, in the fifteenth session of the Lanzhou CityPeople’s Congress fourth conference, the mayor reported that "It can gradually to buildecological water after upstream diversion from the upper reaches of the Yellow River to buildthe ’mountain city’". The phenomenon that "no water" in drainage channel would be solvedfundamentally."Sanshui Huiyuan bud" refers to not only reduce sediment into the YellowRiver, more important is that the collection of rainfall can re-inject into drainage channel,with "water" basis for the drainage channel landscape ecological reconstruction.Thirdly, the paper focuses on the basis of the previous text from the point of view oflandscape ecology research focus for the transformation of the city of Lanzhou city drainagechannel including the design principle, section design, ecological revetment design etc. Notonly that, let the Yellow River become "passing" stand of "string" the city. Make the dreamthat "mountain water" for the city of Lanzhou comes true. In building a city livableenvironment is perfect and the construction of a harmonious coexistence of human and natureat the same time.The city drainage channel is a potential resource in the future development of LanzhouCity. With the continuous development of the city, the function of the city drainage channel should be redefined, is not only used for flood, but for building the ecological landscape,positive culture and leisure, economy and regional development driving function of the city.And it will become a most beautiful city card at last for Lanzhou.