摘要
利用1972—2015年Landsat MSS/TM/OLI以及CBERS遥感影像数据,得到近40 a新疆土地利用时空数据,综合分析新疆土地利用及其绿洲的动态变化与动因。结果表明:新疆土地不断开垦、耕地面积不断扩大,已达到了相当的数量规模;土地的开垦与撂荒成为新疆乃至我国西北干旱地区土地利用变化最重要的特征,耕地撂荒与土地开垦的比率逐期下降,土地利用效率不断提高;城镇居民建设用地持续扩大;近40 a里,绿洲面积逐步扩大,面积占比由8. 18%上升到9. 93%;人工绿洲面积及占比也逐步增大,目前一半以上的绿洲面积为人工绿洲。气候的暖湿变化,以及政策、人口、社会经济、科技等要素成为新疆土地利用变化的动因。本文还提出了在关注各类土地数量变化的同时进一步开展土地开发的质量变化与评估研究。
In this study,a comprehensive analysis on the dynamic change and its causes of the land use and oasis was conducted based on the spatio-temporal data of/and use in Xinjiang,China obtained by using the remotely sensed data from Landsat MSS/TM/OLI and CBERS in the past 40years from 1972to 2015.The results indicated that the cultivation area in Xinjiang had been constantly expanding as result of land reclamation,which had reached a considerable quantity;the land reclamation and some of the cultivated land left uncultivated become the most important feature of the land use in Xinjiang and even in northwest arid area of China.The ratio of the land left uncultivated against the land reclaimed was gradually being decreased,translating into a continuously improving efficiency of land use ;the construction land of urban residents has been expanded continuously.The area of oasis has gradually been expanded with its occupation rate being inereased from 8.18%to 9.93%.The area of artificial oasis and its proportion have also been increased gradually.At present,more than half of the oasis area is the artificial oasis.The warm and wet climate changes,as well as the policies,population,social economy,science and technology and other factors have become the motivation of the change of land use in Xinjiang.This paper also puts forward the research on the quality change and evaluation of land development while paying attention to the change of land quantity.
作者
贺可
吴世新
杨怡
王丹
张寿雨
尹楠
HE Ke;WE Shi-xin;YANG Yi;WANG Dan;ZHANG Shou-yu;YIN Nan(Laboratory of LUCC and Global Change ,Xinjiang Institute of Ecology and Geography,Chinese Academy of Science,Urumqi 830011,Xinjiang,China;University of Chinese Academy of Sciences ,Beijing100049,China)
出处
《干旱区地理》
CSCD
北大核心
2018年第6期1333-1340,共8页
Arid Land Geography
基金
国家科技基础资源调查专项课题(2017FY101004)资助
