CAJ | 학술논문

石漠化是广泛存在于中国西南地区的一种生态-地质灾害,目前已成为备受关注的研究热点和难点.为了解喀斯特高原山区石漠化景观的时空变化,以贵州省普定县南部的典型喀斯特高原山区后寨河流域为例,以3期遥感影像(1987年和1995年的TM影像与2004年的SPOT-5影像)作为数据源,借助于ArcGIS9.0等软件和数理统计分析方法,从石漠化强度分级的角度对近18 a来石漠化的动态变化进行了研究.结果表明:从整体上来看,整个流域的石漠化出现扩展的趋势,其中前期(1987-1995年)的扩展速度为6.55 hm~2/a,后期(1995-2004年)的扩展速度为29.64 hm~2/a,扩展速度呈现增加的趋势.其中,轻度石漠化的面积呈现出先减少后增加的趋势;而中度石漠化和强度石漠化的面积均呈现出逐渐增加的趋势.
석막화시엄범존재우중국서남지구적일충생태-지질재해,목전이성위비수관주적연구열점화난점.위료해객사특고원산구석막화경관적시공변화,이귀주성보정현남부적전형객사특고원산구후채하류역위례,이3기요감영상(1987년화1995년적TM영상여2004년적SPOT-5영상)작위수거원,차조우ArcGIS9.0등연건화수리통계분석방법,종석막화강도분급적각도대근18 a래석막화적동태변화진행료연구.결과표명:종정체상래간,정개류역적석막화출현확전적추세,기중전기(1987-1995년)적확전속도위6.55 hm~2/a,후기(1995-2004년)적확전속도위29.64 hm~2/a,확전속도정현증가적추세.기중,경도석막화적면적정현출선감소후증가적추세;이중도석막화화강도석막화적면적균정현출축점증가적추세.
As one of the most serious geo-ecological disasters in Karst areas in Southwestern China,rocky desertification has become one of the key and difficult research issues.Taking the Houzlaaihe Valley in Puding County,Guizhou Province,Southwestern China as an example,the landscape pattern changes of Karst rocky desertification in the recent 18 years in Karst plateau area were studied from the perspective of different rocky desertification levels,based on 3 series of remote sensing images(TM images of 1987 and 1995 and SPOT-5 image of 2004),and applying GIS technique and statistics analysis methotts.Results indicated that,as a whole landscape,the intensity and rate of rocky desertification land were increasing in the recent 18 years.The increasing rate ofrocky desertification were 6.55 hm~2/a from 1987 to 1995.and 29.64 hm~2/a from 1995 to 2004.Different rocky desenificafion levels had shown different change tendencies.The area of light rocky desertification land reduced at first(from 1987 to 1995)and then increased (from 1995 to 2004),while the area ofmoderate and severe rocky desertification land increased continuously from 1987 to 2004.