摘要
石漠化是中国西南地区的一大生态顽疾,运用遥感技术进行大范围监测是不可或缺的手段。要加强监测成果的应用和相互比较,就必须要有一套统一的行业标准和通用的提取方法来规范目前的研究。本文介绍了喀斯特石漠化定义的演变,根据研究区域范围的不同,总结了石漠化的3种分类分级标准。石漠化的遥感监测技术呈现精确化、定量化的趋势,文中归纳了监督分类、综合分析、光谱分析、定量法四种从遥感图像提取石漠化信息的方法。最后讨论了在实际的遥感监测工作中需要克服的难点。
Remote sensing technique is the necessary method in monitoring widespread rocky desertification, which is one of the ecological disasters in southwest China. In order to compare monitoring result from different areas and increase their application, a set of integrate standard and extracting methods are badly in need. The development and change of definition of rocky desertification was introduced. According to study area, three classification standards were summarized. Researches on monitoring rocky desertification based on remote sensing technique turn into quantificational and more and more accurate. Supervised classification, comprehensive analysis, spectrum analysis and quantitative method were concluded to extracting information form images. Finally, some difficulties in the actual monitoring work were discussed.
出处
《环境与发展》
2011年第12期95-98,共4页
Environment & Development
关键词
遥感
石漠化
喀斯特
remote sensing
rock desertification
karst
