WEI Minghuan,HU Boyang,ZHANG Guijun,et al.Analysis on Dynamic Change of Land Ecological Vulnerability in Mountainous County—Taking Qinglong Manchu Autonomous County as an Example[J].Research of Soil and Water Conservation,2018,25(02):322-327.
山区县土地生态脆弱性动态变化分析——以青龙满族自治县为例
- Title:
- Analysis on Dynamic Change of Land Ecological Vulnerability in Mountainous County—Taking Qinglong Manchu Autonomous County as an Example
- 分类号:
- X171
- 摘要:
- 土地生态脆弱性研究对加强山区县域生态恢复及保护，促进资源环境与社会经济的协调发展有重要作用。以青龙满族自治县为例，从自然条件和人为因素两方面选取7个指标构建评价指标体系，运用综合指数法对2001年、2007年、2013年研究区生态脆弱性进行了定量评价，分析了生态脆弱性时空分布，最后采用变化斜率法分析生态脆弱性演化趋势。结果表明：研究区2001年、2007年、2013年轻度脆弱区所占比重分别为50.56%，52.50%，54.97%，2001-2013年研究区中等以上脆弱性区比重由48.84%下降到44.35%，说明研究区整体而言生态脆弱性显著，但以轻度脆弱为主，且生态脆弱性朝着良好态势发展；研究区土地生态系统脆弱性普遍存在西北部高，中东部低的态势；生态脆弱性显著提高的区域主要为轻度脆弱区，显著降低的区域主要为中、高度脆弱区，另全域绝大部分地区脆弱性变化趋势并不显著。
- Abstract:
- The study of land ecological vulnerability has an important role in strengthening the ecological restoration and protection of mountain areas, and promoting the coordinated development of resources, environment and social economy. This article took Qinglong Manchu Autonomous County as an example, and the evaluation index system was built from natural conditions and human factors with seven indicators. The ecological vulnerability of the study area in 2001, 2007 and 2013 was quantitatively evaluated by the comprehensive index method, and then the spatial and temporal distribution of the ecological vulnerability was analyzed. Finally, the change slope method was used to analyze the evolution trend of ecological vulnerability. The result shows that:in 2001, 2007 and 2013, the mild vulnerable area accounts for 50.56%, 52.50%, 54.97%, respectively, in the study area, and the proportion above moderate vulnerable area decreased from 48.84% to 44.35%, which means that the ecological vulnerability of the study area is significant, but the mild vulnerability was dominant, and the ecological vulnerability was developing towards a good situation; the ecological vulnerability of land ecosystem was high in the northwest and low in the east; the light vulnerable area significantly increased, and the middle and high vulnerable areas significantly reduced, and there was no significant change trend of vulnerability in the most other regions.
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备注/Memo
收稿日期:2017-4-6;改回日期:2017-5-2。
基金项目:河北省社会科学基金“河北省城乡一体化进程中耕地资源安全评价及保护机制研究”（HB14GL040）
作者简介:魏明欢(1992-),男,河北沧州人,硕士研究生,研究方向为农村土地利用与评价。E-mail:13333229932@163.com
通讯作者:张蓬涛(1971-),男,河北保定人,教授,主要从事土地经济与评价研究。E-mail:zhangpt@hebau.edu.cn