摘要
为了获取阜新市北部地区10年来沙化变化情况,文中基于Landsat遥感影像利用决策树模型提取了阜新市北部沙化地区2003年、2008年和2013年沙化信息,并运用转移矩阵模型,从沙化等级变化特征对研究区域的沙化情况进行定性、定量分析。结果表明:从2003年至2013年阜新市北部沙化地区重度沙化面积大幅度减少;中度沙化面积有所减少,轻度沙化面积大幅度增加;有少部分土地在中度沙化和轻度沙化之间转换。以10年作为一个时间序列,5年作为时间节点,利用基础统计学理论和随机过程理论马尔科夫链模型对研究区的沙化情况进行动态监测分析。
Due to the huge influence of south-moving of the Korqin desert in the north of Fuxin,the government have taken corresponding measures to prevent enlarging desertification. To get the desertification variation information of the study area for ten years,based on the Landsat remote sensing images,by using decision tree model,desertification information of the study areas in 2003,2008 and 2013 was extracted by using the transfer matrix model. The levels of degradation and desertification characteristics in arid conditions were analyzed qualitatively and quantitatively. The results showed that the severe desertification area in the north area reduced greatly from 2003 to 2013. Moderate desertification area reduced,the desertification area of substantial increased.There was few land conversion occurred between the moderate desertification and desertification.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2018年第2期121-127,共7页
Journal of Arid Land Resources and Environment
基金
辽宁省自然科学基金(2015020090)项目资助