摘要
为探究康保县沙化土地动态变化规律,以2009和2014年2期TM影像为基础数据,对其进行解译,获得2009—2014年沙化土地动态变化数据,以动态度、沙漠化指数、土地重心迁移、转移矩阵对沙化土地动态变化进行研究。结果表明,沙漠化土地面积减少1083.28 hm^2,沙化程度以轻度为主,轻度、中度、重度和极重度沙化面积均减少,沙漠化指数降低0.003。极重度沙化土地重心向东北迁移19.19 km,重度沙化土地重心仅向东迁移0.57 km。康保县土地沙漠化得到改善,沙漠化程度整体好转。康保县以沙化耕地和固定沙地为主,半固定沙地和未沙化土地多转变为沙化耕地和固定沙地。固定沙地和有明显沙化趋势土地动态度为0.47和1.33,面积分别增加2791.51 hm^2和1754.73 hm^2。
In order to explore the dynamic change law of desertification land in Kangbao county,the TM data of 2009 and 2014 were used as the basic data for interpreting the law and the dynamic change data of desertification land during 2009-2014 were obtained.Migration degrees,desertification index,transfer of land gravity center and transfer matrix were chosen as parameters to study the dynamic changes of desertification land.The results showed that the area of desertification land decreased by 1083.28hm^2,the degree of desertification was mainly light,and the areas of mild,moderate,severe and extremely severe desertification all decreased,with the desertification index decreased by 0.003.The center of gravity of the heavily desertificated land shifted 19.19 km to the northeast,and the center of gravity of the severe desertification land shifted only 0.57 km to the east.The desertification of land in Kangbao county has been decreased,and the degree of desertification has generally decreased.In Kangbao county,desertification cultivated land and fixed sandy land are the dominant land types,and semi-fixed sandy land and non-sandy land are mostly converted into desertification cultivated land and fixed sandy land.The dynamic degrees of the fixed sandy land and the land with obvious desertification trend were 0.47 and 1.33,and the areas increased by 2791.51 hm^2 and 1754.73 hm^2,respectively.
作者
董大鹏
徐青
马佳明
赵鹏
李程安
刘雪莹
谷建才
DONG Dapeng;XU Qing;MA Jiaming;ZHAO Peng;LI Chengan;LIU Xueying;GU Jiancai(College of Forestry,Hebei Agricultural University,Baoding 071000,China;College of Plant Protection,Hebei Agricultural University,Baoding 071000,China;Shuangqiao District Water Affairs Bureau of Chengde City,Chengde 067000,China)
出处
《林业与生态科学》
2020年第2期157-163,共7页
Forestry and Ecological Sciences
基金
国家重点研发计划课题(2016YFC0500802)。
关键词
康保县
沙化土地
动态变化
Kangbao county
desertification land
dynamic change
