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OALib Journal期刊
ISSN: 2333-9721
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三峡库区重庆段生态与环境敏感性综合评价
DOI: 10.11821/xb201105006, PP. 631-642
Keywords: 生态环境敏感性,土壤侵蚀,石漠化,生境,酸雨,三峡库区,重庆
Abstract:
在RS与GIS技术的支持下，选择研究区比较突出的土壤侵蚀、石漠化、生境和酸雨4个生态环境要素建立敏感性评价模型与方法，对三峡库区重庆段生态环境敏感性进行综合研究，定量揭示了研究区生态环境敏感性程度及其空间分布规律。研究结果表明(1)土壤侵蚀以高度敏感、中度敏感和极敏感为主；东北部是土壤侵蚀最为敏感的区域；土壤侵蚀现状与土壤侵蚀敏感性具有很好的对应关系。(2)石漠化总体以不敏感为主，其次是高度敏感和中度敏感；高度以上敏感区主要分布东北部地区，中度以上石漠化与石漠化高度和极敏感区具有很好的对应关系。(3)生境敏感性类型以不敏感为主，其次为高度敏感地区；东北部和南部生境敏感性高，而中西部地区生境敏感性低。(4)酸雨高度敏感面积和比例最大，其次是中度敏感和轻度敏感区；极敏感区呈块状零星散布、高度敏感区和中度敏感区集中片状分布、轻度敏感和不敏感区沿江河带状分布，部分呈团块状散布。(5)生态环境敏感性类型以高度敏感为主，其次为中度敏感区和不敏感区；东北部和南部生态环境敏感性高，中西部地区生态环境敏感性低。
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