【作者】 曹永翔； 刘小丹； 张克斌； 陈明；

【Author】 CAO Yong-xiang~1,LIU Xiao-dan~2,ZHANG Ke-bin~3,CHEN Ming~3 (1.Hydrochina Xibei Engineering Corporation,710065,Xi’an,China 2.Capital Engineering and Research Incorporation Limited,066004,Qinhuangdao,China 3.College of Soil and Water Conservation,Soil and Water Conservation Key Lab.of Ministry of Education,Beijing Forestry University,100083,Beijing,China)

【机构】 中国水电顾问集团西北勘测设计研究院； 中冶京诚(秦皇岛)工程技术有限公司； 北京林业大学水土保持学院 水土保持与荒漠化防治教育部重点实验室；

【摘要】 都兰县察汗乌苏绿洲植被覆盖度变化,利用归一化植被指数NDVI提取察汗乌苏绿洲不同时期的植被覆盖度等级图,定量分析评价植被覆盖度的多年变化。结果表明,近16年来,察汗乌苏绿洲植被覆盖度总体呈现波动增长趋势,2001～2006年期间各类植被变化幅度明显高于1990-2001年期间的变化幅度,1990-2001年植被整体向好的方向发展,有50017.50 hm~2的极低盖度植被转变为更高盖度植被,2001-2006年增加了6026.85 hm~2的极低盖度植被,并有4048.47 hm~2的高盖度植被减少,说明仍存在局部退化。影响都兰县察汗乌苏绿洲植被覆盖度变化的原因主要是实施了生态工程措施、气候因素和水资源因素的变化。研究结果可以为该区域植被恢复和荒漠化防治提供理论支撑。更多还原

【Abstract】 In order to study variation of vegetation coverage in Tsagan Us oasis,Basing on NDⅥ,the grade map of vegetation coverage of different period in Tsagan Us oasis was extracted,and multi-year variation of vegetation coverage was quantitatively analyzed.The result showed that in the past 16 years,vegetation coverage of Tsagan Us oasis presented fluctuation-increase trend,change range of every class vegetation from 2001 to 2006 year was greater than the one from 1990 to 2001 year,the vegetation development had a good trend from 1990 to 2001 year,there was 50017.50 hm least low coverage vegetation transformed to higher coverage vegetation,from 2001 to 2006 year,there was 6026.85 hm least low coverage vegetation increased and 4048.47 hm high coverage vegetation reduced,which showed there was degradation existed in some places.The reasons of vegetation coverage change include carrying on ecological recovery measures and change of climate and water resource.The result can provide theory support for vegetation restoration and desertification combating.更多还原