近40a来精河流域绿洲土地利用/土地覆被时空动态演变

以1972-2010年精河绿洲的遥感影像及相关资料为依据通过对LUCC的对比分析发现:(1)近40a年来,研究区的未利用土地、水域、低覆盖度植被区面积始终保持前三位。(2)LUCC类型发生了显著变化,耕地、建设用地、未利用土地呈增势,其中建设用地和未利用地为主要转入类型;水域和植被覆盖区呈减势,其中水域和低、高覆盖度植被区为主要转出类型。(3)植被退化和水域面积减少主要受到年均温上升、年蒸发量增大等自然因素影响;建设用地和耕地面积增大主要受到人口增长、城市快速发展等人文因素的影响。

The dynamic progression of temporal and spatial changes of the land use/land cover in Jinghe valley oasis

In this paper we analyzed the LUCC of the Jinghe oasis from 1972 to 2010.The result shows that(1) The unused land,water and low vegetation coverage area always maintained the top three in the oasis.(2) The LUCC of this area showed obvious changes.Cultivated land,construction land and unused land showed out a development direction with the increase scale.Construction land and unused land were mainly on the state by other land use types;Waters and vegetation coverage area displayed a reduce direction;Waters low and high coverage vegetation area were on the unbalance state and changed into other land use types.(3) The annual average temperature increased and the high annual evaporation as the natural factors affected vegetation degeneration and waters reduce;The increase of construction land and cultivated land area were mainly affected by human factors of population growth and the fast development of urbanization.