HAN Lei,KONG Xiangbin,GUO Hongfeng,et al.Study on Land Eco-security Evaluation of Ecological Sensitive Area in Southwest Mountains -A Case Study in Xiushan County[J].Research of Soil and Water Conservation,2015,22(01):229-234,240.
西南山区生态敏感区土地生态安全评价——以秀山县为例
- Title:
- Study on Land Eco-security Evaluation of Ecological Sensitive Area in Southwest Mountains -A Case Study in Xiushan County
- Keywords:
- land eco-security evaluation; ecological sensitive area of southwest mountains; county level; gird; Xiushan County
- 分类号:
- X171;F301.2
- 摘要:
- 研究综合应用数字高程模型（DEM）、遥感影像及土地利用现状更新调查等数据，应用地理信息系统（GIS），基于栅格对秀山县土地生态安全状况进行了评价和分析，为西南山区生态敏感区探索一种精确的生态安全评价方法。结果表明：秀山县土地生态安全状况可以分为安全、较安全、预警、中警4个级别，各级别的面积分别占21.23%，43.97%，21.81%，4.99%。其中土地生态安全级主要分布在中部平坝丘陵区；土地生态较安全级在全县均有分布，多分布在各区域坡度较小、海拔相对较低等位置；土地生态预警级主要分布在东部低山区南端、西部低山区、以及东部中山区和西部中山区中海拔相对较低的位置；土地生态中警级主要分布在东部中山区和西部中山区。综上，秀山县土地生态状况整体上良好，与实际情况相符合，今后应加强土地利用结构优化，提高土壤培肥力度，减少水土流失，以促进土地生态系统健康稳定发展。
- Abstract:
- The purpose of the paper is to explore a precise evaluation approach for land eco-security researches for ecological sensitive area of southwest mountains via using digital terrain model (DEM), MODIS remote sensing data and investigation of land-use status, support under the geographical information system (GIS)and based on the analysis and evaluation of the land eco-security in Xiushan County and the grid data. The result indicated that the land eco-system in Xiushan County was divided into four grades (safe grade, accounting for 21.23% of total area; relatively safe grade, 43.97%; prewarning grade, 21.81%; intermediate warning grade,4.99%). The safe grade was mainly in the central plain hilly region; the relatively safe grade was mainly in relatively low altitude and relatively small slope area of the county; the prewarning grade was mainly in the eastern and northern low mountain area, or at the relative low altitude of the eastern and northern high mountain area; the intermediate warning grade was mainly in the eastern and northern high mountain area. It was concluded that the condition of land eco-security in Xiushan County was better as a whole and it was in accordance with the actual situation.And in the future some measures should be taken to optimize land use structure and intensify orchard management in order to avoid water and soil erosion, promote soil fertility and enhance the health development and stability of the local land ecosystem.
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备注/Memo
收稿日期:2014-02-20;改回日期:2014-05-21。
基金项目:国土资源部土地利用重点实验室“重点区域土地生态状况调查与评价”（201115106318）
作者简介:韩蕾(1986-),女,四川德阳市人,硕士研究生,研究方向:土地资源可持续利用和土地资源评价。E-mail:hanleiooo@163.com
通讯作者:孔祥斌(1969-),男,河北承德市人,博士,教授,主要从事土地资源可持续利用和土地资源评价研究。E-mail:kxb@cau.edu.cn