基于GIS的三峡库区生态环境综合评价 Ⅰ.地势的区域异质性  

Integrated Assessment of Eco-environment in Three Gorges Reservoir Area Based on GIS Ⅰ.Topography Heterogeneity

作　　者：刘祥梅[1] 郭志华[2] 肖文发[2] 王建力[1] 何红艳[2] 杨海明[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]中国林业科学研究院森林生态环境与保护研究所,北京100091

出　　处：《热带地理》2007年第4期300-305,共6页Tropical Geography

基　　金：科技部公益性项目(2003DIB4J14);国务院三峡办与国家林业局联合资助项目(SX2001-012)

摘　　要：随着三峡工程的顺利进行,库区的环境问题及工程对库区资源环境的影响等日益受到关注。地势对区域资源环境影响深刻,库区地势的区域异质性是库区资源环境异质性的基础。因此,对库区地势进行异质性评价对于库区资源环境综合评价以及库区资源环境的保护与建设等均具有重要意义。With the construction of the key water control project in the Three Gorges Reservoir Area （TGRA）, more attention has been paid to the environmental problems and the effects of the project on eco-environment in the reservoir area. Topographical change has profound impacts on the regional eco-environment, and topography heterogeneity is the basis of eco-environment heterogeneity. So it is important to assess topography heterogeneity for protecting and constructing eco-environment of the area. By taking the terrain map of 1： 250 000 as main data fountain, using the method of AHP, a model of integrated assessment on topography of the TGRA is established. The heterogeneity of local altitude, ground up-and-down degree, gradient and slope direction are analyzed. The results show that ： the characteristics of topography heterogeneity in the TGRA are that the east region is more complex and higher than the southwest. Complicated terrain is one of the basic reasons to cause soil and water loss and geological disasters. So in the complex and fragile regions, it is important to convert the cropland into forest, restore and reconstruct vegetation, and set up muhifunctional protection forests.

关 键 词：地势异质性 层次分析法 三峡库区 

分 类 号：P942[天文地球—自然地理学]