生态政策驱动下的内蒙古自治区杭锦旗植被覆盖变化  

Influence of ecological policy on changes in vegetation coverage in Hanggin Banner,Inner Mongolia,China

作　　者：郭秀丽[1,2] 李旺平 周立华 GUO Xiuli;LI Wangping;ZHOU Lihua(Gansu Political Science and Law Institute,Lanzhou 730070,Gansu,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Northwest Institute of Eco-Environment and Resources,CAS,Lanzhou 730000,Gansu,China;Institute of Science and Technology Strategic Consulting and Research,CAS,Beijing 100190,China)

机构地区：[1]甘肃政法学院,甘肃兰州730070 [2]兰州理工大学土木工程学院,甘肃兰州730050 [3]中国科学院西北生态环境资源研究院,甘肃兰州730000 [4]中国科学院科技战略咨询研究院,北京100190

出　　处：《草业科学》2018年第8期1843-1851,共9页Pratacultural Science

基　　金：国家重点研发计划项目(2016YFC0500909);国家科技支撑计划项目(2015BAC06B01)

摘　　要：采用1991、2001和2011年的Landsat-TM卫星遥感影像数据,基于NDVI像元二分模型,对生态政策实施前(1991-2001年)与实施后(2001-2011年)杭锦旗的植被覆盖变化进行了对比分析,并结合研究区的气候变化和生态建设历程对影响植被覆盖变化的因素进行了探究。结果表明,生态政策实施后,杭锦旗的植被覆盖度显著提高,植被覆盖度的年际平均增长速度约为实施前的10倍;植被覆盖状况显著好转,年净好转面积占区域总面积的18.83%。生态政策是驱动2001-2011年间杭锦旗植被覆盖好转的主要因素,降水和气温等对植被覆盖变化的影响并不显著。Vegetation coverage is an important indicator of regional ecological environmental change.Climate change and human activities are the factors affecting vegetation coverage change.Several ecological construction policies were implemented in Hangjin Banner after 2001.Based on the Dimidiate Pixel Model and Landsat5-TM remote sensing data(1991,2001,and 2011),a comparative analysis was conducted of the change in vegetation coverage from the period before the implementation of the ecological policy(1991 to 2001)and that post-implementation(2001 to 2011).The factors affecting vegetation coverage change were explored in conjunction with climate change and ecological construction processes in the study area.The results showed that after the implementation of the ecological policy,the vegetation coverage in the Hangjin Banner increased significantly,and the average annual growth rate of vegetation coverage was approximately 10 times that of the pre-implementation period.Vegetation coverage improved significantly,and the net improvement area accounted for 18.83%of the total area.Ecological policy was the main driving factor of the increase in vegetation coverage during the period 2001-2011.The influence of precipitation and temperature on vegetation coverage was not significant.

关 键 词：杭锦旗 生态政策 植被覆盖变化 NDVI 像元二分模型 

分 类 号：S181-01[农业科学—农业基础科学] Q948[生物学—植物学]