1993—2016年达里雅博依绿洲土地利用变化特征

Characteristics of land Use Change in Dalia Boyi Oasis from 1993 to 2016

基于达里雅博依绿洲1993年、2006年、2011年及2016年4期遥感影像,选用土地利用动态变化度、转移矩阵及景观指数的方法,揭示研究区土地利用的时空演变特征。研究结果表明,1993—2016年,土地利用类型中水域、林地、草灌丛面积呈波动下降趋势,沙丘面积逐年消减,其他用地面积呈波动上升趋势;整体上各类型的土地单一动态变化度较小;绿洲中水域与草灌丛存在不同程度的互相转化,其他用地存在单向转化状况;达里雅博依绿洲景观破碎程度下降。

Based on the 4 remote sensing images of Dalia Boyi Oasis in 1993,2006,2011 and 2016,this paper selected the methods of land use dynamic change degree,transition matrix and landscape index to reveal the spatio-temporal evolution characteristics of land use in the study area.The results of the study show that from 1993 to 2016,the area of waters,woodlands,grass and shrubs in land use types fluctuated downwards,the area of sand dunes decreased year by year,and the area of other land used fluctuated upwards.On the whole,the single dynamic change degree of each type of land was relatively small.From 1993 to 2016,the waters in the oasis and the grass and shrubs were mutually transformed to varying degrees,and there was a unidirectional transformation of other land.From 1993 to 2016,the fragmentation of the Daria Boyi Oasis landscape declined.