Xuzhou City's Ecological Environment Construction

The city construction of China will surround the topic "eco-city" in the 21st century. The paper Points out that "eco-city" construction has narrow sense and broad sense. The former' s target is to improve the natural environment of city, and the latter' s target is to carry out the harmonious of Society, economy and the nature. The study on "eco-city" construction of XuZhou City bases on the comprehension of the narrow sense of "eco-city" .The paper tallied up and analyzed the theories of "eco-city" construction. These theories include the relation of person and nature, sustainable development, ecology, landscape ecology, city space structure, External result and cyclic economics. And the paper gave a detailed analysis on the change of eco-environment and its driving force in the past 25 years. Take this as foundation, the paper analyzed and evaluated the present condition of eco-environment in XuZhou City and found the following problem: at the aspect of green land, the plant category is few, green quantity rate is low, the space structure of green land is improper, the green land area is small, The edge of forests on hills inside the city are suffering from serious damage; at the aspect of water environment, the water landscape function is not well exerted, water pollution is serious, water safety lack in assurance; at the aspect of air environment, air pollution is serious, and the time in which the air quality is inferior to 3-rate standard is 309 days in 2002; at the other aspect, the rate of reused solid waste is low and solid waste's harmless Processing is difficult.According to the actuality evaluation of ecological environment of XuZhou City, the paper renders the protocol of "eco-city" construction. At the aspect of construction of green land system, the paper introduces the protocol of "one circle, two points, one belt and several corridors" into green land construction, gets the protective measures on the base of sensibility analysis for forests on hills and the modes of tridimensional development which aim to raise the area of green land in the center of the city, then discusses the union mechanism of ecological value, economic value and social value of green land. At the aspect of water environment, the paper suggests the protocols aim to transform the hard banks and construct water and green ecological system. In this part, two protocols are rend, the one aims to comprehensively deal with the pollution from point-sources, flat-sources, internal sources and polluted water at the end of the pipeline. The other aims to exploit and protect the water resources and makes use of middle-water sufficiently. At the aspect of atmosphere environment, the paper suggests optimize construction and layout of urban-industry, utilize one hot resource in a wide span in winter and control over the discharge of cars' gas and control the pollution of dust on ground. In the end, the paper suggests the thread of using of solid wastes and harmlessly dealing with them.The paper emphasizes that eco-city construction is a series of comprehensive work. All of the works of building green land system, improving water environment, managing atmosphere environment, dealing with solid wastes and controlling noise pollution are not alone or unlinked, on the contrary, The premise of ecosystem city construction needs the intercoordination of these works.