摘要
在遥感与地理信息系统技术支持下 ,应用主成分分析法对湖北省全省生态环境质量状况进行了综合评价 ,得出了湖北省全省生态环境质量状况分级图。在定义生态环境背景指数和土地资源利用程度指数的基础上 ,通过生成生态环境背景图和土地利用程度图 ,分析了生态环境背景与土地利用程度的关系 ,通过相关分析证明土地资源利用程度与生态环境背景有着明显的相关关系 ,生态环境的好坏决定了土地资源利用程度的高低。同时 。
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=a 1Y 1+a 2Y 2+...+a MY Mwhere E is result of eco environmental synthetic evaluation; a 1 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:I j=100× ∑ 5i=1E i×(A i/S i)where I j is the eco environmental background index of j unit; E i is the grade of the type i of eco environmental background; A i is area in the type i of eco environmental background; S j is the total area in j unit.The equation form of land resources used degree index is:L j=100× ∑ 4i=1A i×C iwhere L j is the land resources use degree index; A i is area in the type i of land resources use degree; C i 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=1N ∑ ni=1(x i-)(y i-)∑(x i-) 2∑(y i-) 2then 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.
出处
《地球科学进展》
CAS
CSCD
2002年第3期426-431,共6页
Advances in Earth Science
基金
中国科学院知识创新工程重大项目 (编号 :KZCX1 Y 0 2 0 1)和 (编号 :KZCX1 Y 0 2 0 2 )资助
