基于PSR模型的三峡库区重庆段土地利用生态风险评价  

Land Use Ecological Risk Evaluation of the Three Gorges Reservoir Area in Chongqing Based on PSR Model

作　　者：周启刚[1] 张晓媛[1] 杨霏[2] 郑莉[1] 曹倩倩[1] 

机构地区：[1]重庆工商大学旅游与国土资源学院,重庆400067 [2]重庆工商大学长江上游经济中心,重庆400067

出　　处：《水土保持研究》2013年第5期187-192,共6页Research of Soil and Water Conservation

基　　金：国家自然基金项目(41101503);国家社科基金重大项目(11&ZD161)

摘　　要：土地利用变化对生态环境有着重要的影响,不合理的土地利用方式会对生态环境带来风险。采用三峡库区重庆段2010年TM遥感数据、社会经济数据以及环境监测数据,采用PSR模型构建评价指标体系,利用主成分分析法建立评价模型,对三峡库区土地利用生态风险进行评价。结果表明:三峡库区重庆段土地利用生态风险以中度风险和较低风险为主,生态风险由东北到西南逐渐减轻。区域土地利用生态环境稳定性存在明显的差异,不合理的土地利用对重庆主城九区及长寿的生态环境影响力有限;而对三峡库区腹心地带的生态环境影响较大,较低的土地利用风险压力将导致区域生态风险状态与响应值偏高。因此三峡库区腹心地带应重点予以关注,强化土地利用过程中的生态环境建设,加强环境治理与生态环境监测。研究结果可为三峡库区土地合理利用与生态保护提供参考。The land use of the Three Gorges Reservoir Area has an important influence on the ecological envi- ronment. Unreasonable land use patterns lead to ecological environment risks. The data sources include the Landsat TM remote sensing data, social and economic data and environmental monitoring data of the Three Gorges Reservoir Area in 2010. The evaluation index system was built based on the PSR model. And the e- valuation model was set up by using the method of principal components analysis to evaluate the land use eco- logical risks of the Three Gorges Reservoir Area. The results indicated that the main land use ecological risk of Three Gorges Reservoir Area in Chongqing are moderate risk and low risk. And from northeast to south- west the land use ecological risk gradually reduced. There are obvious differences among regional eco-envi- ronmental stability of land use. The influences of unreasonable land use on nine districts of Chongqing City and Changshou＇s ecological environment are limited. And the land use ecological risk pressures of the central parts of the Three Gorges This area should be paid Reservoir area are low, but the ecological risk state and response values are high. more attention to intensive ecological environment construction in the process of land use, and strengthen the environmental management and environmental monitoring. The results offer reference value for land rational use and ecological protection of the Three Gorges Reservoir Area.

关 键 词：土地利用 生态风险评价 PSR模型 三峡库区 

分 类 号：X826[环境科学与工程—环境工程]