摘要
以1999年的ETM数据和2009年的矢量数据为数据源,在RS和GIS技术的支持下,分析了青海省德令哈市1999—2009年土地利用/覆盖的时空变化特征,并借助马尔科夫模型,预测了德令哈市未来20a的土地利用/覆盖演变趋势。结果表明,德令哈市土地利用类型以草地为主。在1999—2009年这10a中,草地面积减少最多,减少部分主要退化成未利用地;未利用地减少面积仅次于草地,减少部分主要转化成林地;耕地减少面积位居第3,减少部分主要转化成林地;林地增加面积最多,主要来自耕地和未利用地的转化;耕地的空间动态度最大,其次为林地。在未来20a中,德令哈市耕地和草地的面积会持续减少,林地和建设用地的面积将继续增加。
Based on RS and GIS,taking the ETM data in 1999,vector data in 2009 as the data source,the temperal-spatial change characteristics of land use/cover of Delhi City in Qinghai Province from 1999 to 2009were analyzed,and the evolution trend of land use/cover in the next 20 years was predicted with the Markov model.The results showed that,grass land was the main type of land use,the area of grassland reduced largestly,and the reduced area degenerated to unused land.The area of unused land reduced was next only to grassland,and the reduced area mainly transformed to woodland.The area of arable land reduced next to unused land,and the reduced area also mainly transformed to woodland.The area of woodland increased at most,mainly from the conversion of arable land and unused land.The degree of spatial dynamics of arable land was the biggest,followed by woodland.In the next 20 years,the area of arable land and grassland in Delhi City will continue to decrease,and woodland and construction land continue to increase.
出处
《水土保持通报》
CSCD
北大核心
2014年第5期248-253,共6页
Bulletin of Soil and Water Conservation
基金
海西州国土资源局"青海省海西州土地整治规划"(037-036164)
关键词
土地利用/覆盖
空间动态
演变趋势
马尔科夫模型
德令哈市
land use/cover
spatial dynamics
evolution trend
Markov model
Delhi City of Qinghai Province
