The Land-Grading Study Of The Ecological City

Eco-city as a new model of urban ecological development is conducive to resolve the ecology problems. So it had become the main target of China's 21st century urban development.City land-use space allocation directly impact on the city's ecological environment quality. Urban land grading is a particular economic activity. Under the condition of the socialist market economy, using the urban land grading as the economic lever to improve the land grade and the land price level in the ecological protection zone, to optimize the structure of urban land-use, to direct at a scientific and reasonable way the capacity and scale of urban development in order to strengthen ecological protection and promotion of ecological sustainable urban development.According to the theoretical basis of eco-city land grading and the grading principles, The paper took the concept of the economic value of land resources and ecological value of the land grading as the base to study the eco-city land grading of Wanshuiquan District in Baotou City to post a the solution which select grading factor and weight evaluation. Selecting the land grading factors as the breakthrough points and trying to step the ecological planning factors which are based on the protection of the ecological infrastructures into the land grading factors. And then with the grading factors such as the level of the service areas, the traffic conditions, the public facilities to use multiple factors evaluation to establish a land grading system which is different from other cities.This paper established three land grading schemes whose factors and weight are different. The first scheme which used the traditional method of the land grading did not consider the ecological factors. The second scheme and the third scheme increased the ecological planning factors based on the ecological infrastructures. The weights are about 0.2 and 0.5 respectively. Through the analysis the land grading discipline and characteristics of the three schemes can conclude that: The commercial land was divided into five, the residential land was divided into four, the industrial land is divided into three. In the first scheme the Yellow River ecological protection zone is at the lowest-level in various lands. When increasing the ecological planning factors which based on protect of the ecological infrastructure. The three types of the first scheme and the third scheme had a significant excursion to the Sidaoshahe ecological protection zone, whose land grading was improved significantly. More higher the weight is, more higher the level of the ecological protection zones land-use got. The features of various types of land-use level also had a change: The highest level is the smallest area. The middle-level accounted for the vast majority and presented a regular linear distribution along Sidaoshahe and the Yellow River. The results of the first scheme and the third scheme had obvious ecological characteristics. And the ecological planning factors which based on protect of the ecological infrastructure is the important factors.