基于敏感性分析的生态脆弱区生态安全格局构建——以陕西省榆林市为例  

Establishment of the Ecological Security Pattern in Ecological Fragile Region Based on Sensitivity Analysis——A Case of Yulin City in Shaanxi Province

作　　者：安冬 邓伟[2] 

机构地区：[1]重庆市璧山区环境监测站,重庆402760 [2]重庆市环境科学研究院,重庆401147

出　　处：《安徽农业科学》2016年第7期127-131,共5页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金青年基金项目(51509094)

摘　　要：[目的]探索陕西省榆林市生态脆弱区生态敏感性和安全格局,为该地区的生态保护和建设提供科学依据。[方法]以北方农牧交错带典型生态脆弱区榆林市为研究对象,选取水资源、地质灾害、土壤侵蚀、生境和荒漠化5个生态因子,在单因子生态敏感性评价的基础上,通过综合敏感性分析构建榆林生态安全格局。[结果]土壤侵蚀和地质灾害是影响榆林市生态安全最敏感的因子,中度敏感和高度敏感区面积占有较大比例。生态安全底线、满意和理想区面积比分别为25.69%、41.95%和32.36%。受自然条件和用地现状影响,榆林市生态安全格局地域差异明显,底线区位于白于山、中-南部土壤侵蚀、地灾频发和黄河沿岸地区,满意区位于定边县中部、横山-榆阳中部和神木-府谷北部,理想区主要为古长城以北的风沙区。[结论]榆林市生态敏感性主要以中度敏感为主,其中土壤侵蚀和地质灾害敏感性较高。[Objective]To research the ecological sensitivity and security structure of eco-fragile region in Yulin City of Shaanxi Province,and to provide scientific basis for the ecological protection and construction in this region. [Method] With Yulin City as the research object,five ecological factors were selected,such as water resources,geological disaster,soil erosion,habitat and desertification. Based on the ecological sensitivity evaluation of single factor,ecological security pattern of Yulin City was established by comprehensive sensitivity analysis. [Result]Soil erosion and geological disaster were the most sensitive factors affecting the ecological security of Yulin City. Medium sensitive and high sensitive areas accounted for a relatively large proportion. Ecological security baseline,satisfactory and ideal areas were 25. 69%,41. 95%and 32. 36%,respectively. Affected by natural conditions and land use status,regional pattern of ecological security showed significant differences in Yulin City. Base line area was mainly distributed in Baiyu Mountain,central-southern area with soil erosion and the region along the Yellow River. Satisfactory area included central Dingbian County,central Heng Mountain-Yuyang District,and northern Shengmu County-Fugu County. Ideal area was mainly the windy desert area of northern ancient Great Wall. [Conclusion] Ecological sensitivity of Yulin City is mainly the medium sensitivity; and its soil erosion and geological disaster sensitivity are relatively high.

关 键 词：生态脆弱区 敏感性分析 生态安全格局 榆林市 

分 类 号：S181[农业科学—农业基础科学]