Advances in Earth Science ›› 2002, Vol. 17 ›› Issue (3): 426-431. doi: 10.11867/j.issn.1001-8166.2002.03.0426
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WANG Si-yuan, ZHANG Zeng-xiang, ZHAO Xiao-li, ZHOU Quan-bin
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WANG Si-yuan, ZHANG Zeng-xiang, ZHAO Xiao-li, ZHOU Quan-bin. ECO-ENVIRONMENTAL SYNTHETIC ANALYSIS BASED ON RS AND GIS TECHNOLOGY IN HUBEI PROVINCE[J]. Advances in Earth Science, 2002, 17(3): 426-431.
The research of land use and land cover change is a core and focal point for the study on the global changes. Also the research of eco-environmental change is significantly important for better understanding land use/land cover change and environmental management for sustainable development. In order to analyze eco-environment in Hubei province, the technologies of remote sensing(RS) and geographical information system(GIS) were used. The mathematical methodology for study on eco-environment was explored and developed. This research focused on the analysis of eco-environment and land-use degree in Hubei province. Firstly, this paper got the synthetic eco-environmental evaluation result map of Hubei province using spatial principal components evaluation method. The equation form of spatial principal components evaluation is : E=a1Y1+a2Y2+…+aMYM where E is result of eco-environmental synthetic evaluation; a1 is contribute ratio of i principal component;Y i is i principal component. Using this equation, the eco-environmental evaluation of Hubei province can be calculated as one unit, and the synthetic eco-environmental evaluation map of Hubei province we can get. Secondly, the authors made eco-environmental background index map and land resources used degree map through define the ecological environmental background index and land resources use degree index. The equation form of eco-environmental background index is: Ij=100×∑5 i=1Ei×(Ai/Si) where Ij is the eco-environmental background index of j unit; Ei is the grade of the type i of eco-environmental background; Ai is area in the type i of eco-environmental background; Si is the total area in i unit. The equation form of land resources used degree index is: Lj=100×∑4i=1Ai×Ci where Lj is the land resources use degree index; Ai is area in the type i of land resources use degree; Ci is the area percentage of type i of land resources use degree in analysis-unit. Thirdly, based on eco-environmental background index and land resources use degree index, the relational coefficient formulas are following: c=1/N∑ni=1(xi-x-)(yi-y-)/(∑ (xi-x-)2(yi-y-)2)1/2 then the relations between eco-environmental background index and land resources use degree index were analyzed. At last, the mechanism of eco-environmental background change and its driving forces were discussed in this paper.