毛乌素沙地荒漠化演变特征分析

该文以毛乌素沙地为研究区,采用遥感和GIS技术手段,通过2000、2007、2009及2014年的4期卫星遥感影像,进行解译获取研究区荒漠化现状特征,并在此基础上通过叠加分析和景观格局指数分析方法,对研究区的荒漠化特征进行的演化分析。分析结果表明:(1)从2000年~2014年期间,研究区荒漠化土地面积有所增加趋势,从2000年的1285004.97km^2上升到2014年的756433.26km^2。(2)从景观指数角度分析,从2000年~2014年间研究区具有景观破碎程度均较低,各景观类型之间的破碎化值差距较大等特征。(3)从景观类型的转移特征来看,从2000年~2014年间荒漠化程度先好转又恶化的特征,总体上荒漠化程度加剧特征。

this text as the research area of maowusu sandy land, using remote sensing and GIS technology, by2000, 2007, 2009 and 2014, four satellite remote sensing images, to interpret characters of desertification research area,and on this basis through the overlay analysis and landscape pattern index analysis method, the characteristic analysis of the evolution of desertification in the study area. Analysis results show that:(1)from 2000-2014 period, the study area of desertification land area has increased trend, up from 1285004.97 km^2 in 2000 to 756433.26 km^2 in 2014. 2)from the perspective of the landscape index from 2000-2014 with a degree of landscape fragmentation in the study area are low,large fragmentation of value gap between various landscape types. 3)from the perspective of the transfer characteristics of landscape types, from 2000-2014, the characteristics of the desertification degree to better and worse, the overall characteristics of desertification degree aggravate. From the results, this paper studies the results of the maowusu sandy land desertification governance has important practical significance.