摘要
基于汉中市存在的生态问题,选取土壤侵蚀、生境、酸雨作为评价因子,在GIS技术支持下对单因子进行敏感性评价,采用叠加分析法对研究区生态环境敏感性进行综合分析.结果表明,2005—2015年,重度敏感区及极敏感区比重上升3.06%,中度敏感性区比重下降6.60%,不敏感区比重上升0.44%,轻度敏感区比重上升3.10%,整体生态环境敏感性升高.低敏感性区域主要分布在佛坪县、洋县、汉台区南部、城固县中部、勉县东北部,这些区域生态系统稳定可以进行合理的经济开发;中度敏感区主要分布在宁强县、勉县北部、南郑县西北部、镇巴县西北部,这些区域生态系统相对稳定应谨慎开发;高度敏感区主要分布在南郑县东南部、西乡县西北部、镇巴县南部,这些区域生态系统极易受到外界因素干扰,应限制性开发,加强保护.研究结果可以为汉中市生态环境保护及可持续发展提供科学参考.
Based on the ecological sensitivity problems in Hanzhong City,using the soil erosion,habitat and acid rain as the assessment factors,we analyze the sensitivity of single factor by GIS technology and comprehensive analysis of ecological environmental sensitivity by superposition analysis to reveal the extent and the distribution of ecologically sensitivity in the research area. The results show that the heavily sensitive areas and extremely sensitive areas are increased by 3.06%,the moderately sensitive areas are decreased by 6.60%,the insensitive areas are increased by 0.44%,the extremely sensitive areas are increased by 3.10%,and the overall ecological environment sensitivity is increased high from 2005 to 2015. The low-sensitivity areas are mainly distributed in Foping,Yangxian, southern of Hantai,central of Chenggu and northeast of Mianxian. These regional ecosystems can be stabilized for the sound economic development. Moderately sensitive areas are mainly distributed in Ningqiang,northern Mianxian, northwest of Nanzheng,and northwest of Zhenba. These regional ecosystems should be developed with relative stability. The highly sensitive areas are mainly distributed in the southeast of Nanzheng,the northwest of Xixiang, and the southern part of Zhenba. These regional ecosystems are highly vulnerable to the external factors and should be strengthened to protect the restrictive development. The results can be used as a scientific reference for ecological environmental protection and sustainable development in Hanzhong.
作者
刘冰
赵永华
LIU Bing;ZHAO Yonghua(College of Earth Sciences and Resources,Changan University,Xi'an 710000,China)
出处
《河南科学》
2019年第2期262-269,共8页
Henan Science
基金
国家自然科学基金项目(31670549
31170664)
中央高校基金项目(310827172007)
陕西省重点科技创新团队计划项目(2016KCT-23)
关键词
生态敏感
土壤侵蚀
生境
酸雨
ecologically sensitive
soil erosion
habitat
acid rain
