摘要
土地利用/覆被变化(LUCC)是当今世界重要的环境变化,对区域生物多样性和生态系统功能有深刻的影响.但土地利用/覆被变化不仅与自然因素有关,而且更受土地利用与土地管理政策的影响.本文以鄂尔多斯市伊金霍洛旗为例,利用不同时期遥感数据资料,解析了退耕还林(草)政策前后的土地覆盖变化特征.结果显示:该地区在执行退耕还林(草)的政策后,草地面积从占区域总面积40.64%(1994年)增长到70.72%(2013年);沙地由占总面积的44.73%(1994年)减少到25.61%(2013年);在2004-2013年经济快速发展期,伊金霍洛旗的LUCC处于不平衡态和极端不平衡态,土地覆被类型(除耕地类型外)在此时间序列上的状态指数P值为-0.42-0.99,|P|均值为0.732;人口增长和生活水平提高对资源和经济发展的需求是驱动区域土地利用/覆盖动态变化的重要因素之一.
Land use/cover change (LUCC) is an important environmental issues in current world,which have a profound impact on regional biodiversity and ecosystem function. LUCC is af- fected by natural factors and land use and management policies. Current study analyzed the LUCC of Ejin Horo banner, Ordos city, before and after Conversion of Degraded Farm Land into Forest (Grass) policy by remote sensing data of different periods. The results were as follows: 1) After im- plemented of the policy, the grassland area increased from 40. 64% (1994) of the total area to 70.72% (2013). Meanwhile,the sandy land area reduced from 44.73% (1994) of the total area to 25.61% (2013). 2) From the year 2004 to 2013,which was the rapid economic development period, the P-value of all the land cover (except farmland) was -0.42-0.99 and the average was 0. 732, indicated a non-balanced or extremely unbalanced state of LUCC. 3) The population boost and up- turn living standards required more resources usage and economic development, which was the main reason of LUCC changes.
出处
《内蒙古大学学报(自然科学版)》
CAS
北大核心
2016年第5期542-548,共7页
Journal of Inner Mongolia University:Natural Science Edition
基金
国家科技支撑计划项目(2011BAC07B00)资助
内蒙古大学研究生科研创新项目(14020202-01057)
关键词
退耕还林(草)
3S技术
土地利用/覆被变化
区域生态环境
Conversion of Degraded Farm Land into Forest (Grass)
3S technology
land-use/cover
regional ecological environment