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贵州岩溶石漠化20年演变特征与影响因素分析

DOI: 10.6046/gtzyyg.2013.04.21, PP. 133-137

Keywords: 石漠化,遥感,贵州,演变

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Abstract:

贵州是我国岩溶石漠化最严重的省份,分析其石漠化长期演变规律可为该省石漠化治理工作提供客观依据。以20世纪80年代末、90年代末及2008年3期、时间跨度达20a的遥感图像为基础数据,经过几何纠正、图像配准、影像镶嵌、辐射校正和信息增强等处理,依据石漠化分类标准进行遥感图像解译和信息提取;结合野外调查和解译修正,得到贵州省碳酸盐岩分布图、石漠化现状分布图、石漠化演化图和石漠化数据库。通过对比分析认为:从20世纪80年代末至90年代末,贵州省岩溶石漠化呈严重恶化态势,年均恶化面积达744km2;从20世纪90年代末至2008年前后岩溶石漠化有所改善,年均改善面积为1153.3km2。同时,结合贵州省石漠化演变特征,讨论了农业人口的减少、沼气的开发利用、人均收入的增加以及退耕还林国策与石漠化演化规律的相关关系,以期为石漠化的进一步改善和治理工作提供客观依据。

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