摘要
根据主导性、科学性以及可操作性原则选取了地形地貌、土壤类型、耕作方式、降雨及植被覆盖度因子,采用层次分析法在GIS空间分析技术的支持下,对重庆三峡库区的水蚀荒漠化危险程度进行评价,评价结果分为无危险、轻度危险、中度危险以及重度危险4级。结果表明研究区内水蚀荒漠化危险程度为中度危险,但是潜在危险程度比较大,且存在明显的地区差异,从东北往西南逐渐减轻。
Followed by principles of dominance, scientificity and practicability, the paper made risk level assesements on waterpower desertifieation in the Three Gorges Reservoir Areas, by application of GIS spatial analysis technology and Analytic Hierarchy Process（AHP）. Specifically, topography, soil type, tillage methods, rainfall and the vege- tation coverage factors were selected as indicators in risk assessments. The evaluation results classified into four risk levels, namely, risk-free, mild , moderate, and severe. Study results indicate that the waterpower desertification of the Three Gorges Reservoir area appears to be moderate risky while the potential poses rather high. Besides, regional variation in risk level appears to be substantial with risk level decrease gradually from the northeast to the southwest in studied areas.
出处
《三峡环境与生态》
2012年第3期37-40,共4页
Environment and Ecology in the Three Gorges
基金
青年科学基金项目三峡库区屏障带土地利用生态风险数值模拟(编号:41101503)
关键词
三峡库区
水蚀荒漠化
层次分析法
评价
the Three Gorges Reservoir area
waterpower desertification
AHP
evaluation
