The Analyzes On Urban Edge Effect In The Course Of Chang-Zhu-Tan Integration

The edge effect can cause the fringe area to gather city and the village economical superiority, and can produce the function which surmounts independent function of the various regions component and the multiplication benefit. In the condition that the key city development already was the mature situation , the development fringe area may alleviate, to a great extent , the extent of the bottleneck of the city further develops, can open up the scope of the urban development and raise the urban development level. In the course of advances of Chang-Zhu-Tan integration positively in the Hunan provincial government, if we can display the edge effect of Chang-Zhu-Tan fringe area fully, combined with economy superior of key city, Chang-Zhu-Tan integration may be speed up greatly.This article first carries on the elaboration to the edge effect mechanism, pointes out that the negative entropy, which produces the edge effect, is the base, which the fringe area carries on the energy flow exchange with the outside as the diffusion structure system. The coordination can cause the various subsystems each other to coordinate and synchronize between the fringe areas, which is basis which produces the edge effect.The edge effect full displays on ecology plan, land utilization and spatial combination and so, can powerfully promote Chang-Zhu-Tan integration development. The edge effect, in the ecology aspect, can promote positive open operation of the city ecosystem, realize the city synthesis ecology benefit; in the land utilization aspect, is advantageous to the ecological environment resources protects, development and the implementation of the afforested land, enhances suit degree of the land development; in the urban development space combination aspect , is advantageous to the city sustainable development, the urban setting optimization and the city shape optimization. Therefore in Chang-Zhu-Tan integration development advancement, based on which we must know profoundly the edge effect, we must take the following measure: carries on the overall plan to the ecological environment, protects ecology resources, establishes the water used, the saving water system and so on; establishes relevant law of land utilization, establishes perfect land market, carries on the macroeconomic regulation and control to the land plan and so on; develops the hygienic cities vigorously, carries on the optimization to Chang-Zhu-Tan overall layout and so on. Thus constructs Chang-Zhu-Tan to an urban cluster with an ecological environment exquisite, the land utilization optimization and the reasonable spatial layout.