欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (8): 240-247.

所属专题： 农业生态； 耕地保护

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于GIS的三峡库区土地生态安全评价——以丰都县沿江地区为例

孙芬 吴涌泉 刘秀华 杨柳 钱昱如   

  • 收稿日期:2011-05-09 修回日期:2011-07-07 出版日期:2012-03-15 发布日期:2012-03-15

Land Eco-security Evaluation in the Three Gorges Reservoir Area Based on GIS——A Case Along the Yangtze River Region of Fengdu County

  • Received:2011-05-09 Revised:2011-07-07 Online:2012-03-15 Published:2012-03-15

PDF (PC)

683

摘要：

充分运用遥感数据、数字高程模型和各种调查数据，以栅格为分析单元，利用层次分析法和GIS相结合的方法，实现了对三峡库区丰都县沿江地区土地生态安全状况的分析和评价，以期为三峡库区绿色生态屏障建设提供一定的指导。结果表明，研究区重警、中警、预警、较安全、安全状态的比例分别为0.15%、5.36%、41.85%、46.07%和6.57%，土地生态安全状态以较安全状态和预警状态为主。生态屏障区土地生态安全状况主要为重警、中警状态，该区域是沿江地区生态环境最为脆弱的区域。研究区长江南岸土地生态状况较好，而长江北岸土地生态状况主要以预警为主，土地生态功能退化较严重。通过对土地生态安全等级状况的分析，明确了区域土地生态安全格局和形成原因，为构建区域生态安全格局提供了有益参考。

关键词: 保叶效果, 保叶效果

Abstract:

In order to provide theoretical guidance for ecological barrier construction of the Three Gorges reservoir, with remote sensing data, digital elevation model and various survey data, using the method of AHP and GIS, the author analyzed and evaluated the land eco-security situation of the Yangtze River region of Fengdu County based on grid unit. The results showed that the proportion of serious-warning, moderate-warning, light-warning, relatively safe and safe area were 0.15%, 5.36%, 41.85%, 46.07% and 6.57%，respectively. The state of land eco-security mainly was relatively safe and light-warning; but the state of land eco-security of the ecological barrier mainly was moderate-warning and serious-warning, this area was the most vulnerable area of the Yangtze River region of Fengdu County. Study proved that the state of land eco-security in the south of Yangtze River was good, but contrary in the north which ecological degradation was very seriously. Through the land eco-security evaluation, people were aware of the land eco-security pattern and formation reason, which provided a useful reference to the construction of land eco-security pattern.

中图分类号: