Studies On Status Quo And Optimization Of Jiang-Nan Landscape Ecological Patterns Under The Background Of Urban-Rural Integration

With the object of xi-shan which lies in the core area of the wealthy Changjiang Delta and with the theory of urban-rural space-integration and landscape patterns optimization and ecological security patterns, this paper deals with the present landscape ecological patters of Xishan District on the base of the Wuxi Urban Plan and the GIS techniques. Then four landscape ecological problems were pointed out as follows: (l)The area of matrix dropped, the natural matrixes are fragmented and its continuity is poor; (2)The area and number of architectural patterns increased and patterns expanded irrationally; (3)The architectural disturbing patterns destroyed the environment more rapidly, which led the local vegetal communities vanished; (4)Generally speaking, the rationality of landscape pattern decreased .It needs optimization plan and construction. At the same time, based on the non-construction land plan of Wuxi and Xishan, the paper analyzed and evaluated the structure and proportion of basic ecological land with the theory of landscape ecology. Then the space- layout and proportion of architectural land and ecological matrix land are proved rational which has satisfied the requirement of district ecological security. After the evaluation there was a construction of landscape ecological security pattern of Xishan, which set off five source-section: Doushan hill, Houshan hill, Honshan hill, Ezhen lake, and ecological barrier. Moreover, the paper built three landscape ecological optimization models on the base of local status and showed the approaches and measures which would help building the landscape ecological pattern. Especially the paper brought the ecological bi-sensitive of paddy and the particular effect on the ecological security. At last, the paper showed that agricultural land is the important and irreversible part of basic ecological land in the process of urban-rural space-integration which make effects on realizing ecological optimization and landscape beautification, guaranteeing the food-providing security,protecting the local culture and harmonizing the relation of society; economic and enviorment.