鄂西南地区近期植被覆盖度时空变化特征及原因分析  

Analysis on Spatial-temporal Characteristics and Driving Force of Vegetation Coverage Changes in the Southwest of Hubei Province During Recent Years

作　　者：王璐瑶[1] 王宏志[1] 徐新良[2] 潘方杰 

机构地区：[1]华中师范大学城市与环境科学学院,武汉430079 [2]中国科学院地理科学与资源研究所/资源与环境信息系统国家重点实验室,北京100101

出　　处：《湖北农业科学》2016年第17期4514-4519,共6页Hubei Agricultural Sciences

基　　金：国家科技支撑计划项目(2008BAK50B01);高分辨率对地观测系统重大专项(00-Y30B15-9001-14/16)

摘　　要：在Spot Vegetation NDVI时序数据的基础上,结合土地利用数据,对鄂西南地区近13年来植被覆盖状况的时空变化过程进行系统分析,并对其变化原因进行了探讨。结果表明,鄂西南地区主要土地利用类型为林地,绝大多数地区植被覆盖度均在75%以上,植被覆盖状况和生态环境整体优良;2001-2009年鄂西南地区植被覆盖状况保持稳定,并从2010年后开始呈现明显好转的态势,植被覆盖度好转地区的面积大于变差地区的面积,表明该区域自实施一系列林业生态工程以来生态环境得到了保护和逐步恢复。气温和降水量对鄂西南地区植被覆盖状况变化的影响不明显;2001年以来林业生态工程的实施是引起鄂西南地区自然植被覆盖状况逐步好转的主要原因,而城镇和耕地周边的土地开发利用活动是引起局部地区植被覆盖下降的重要因素。With the support of land use data and long time series data of spot vegetation NDVI,the spatial-temporal variations of the vegetation coverage from 2001 to 2013 were systematically analyzed, and the main causes in the southwest of Hubei province in the recent years were explored. The results showed that the main land use type was woodland and the vegetation coverage degree in most parts of the region was more than 75%. The vegetation cover condition remained stable in2001 to 2009 and got better after 2010, and the areas that vegetation coverage degree increased was larger than that of decreased,which indicated that the forestry ecological projects had shown effect during 2001 to 2013. The natural factors, such as temperature and precipitation,had a weak influence on vegetation coverage changes;the key factor of the improvement for vegetation coverage degree was the implement of forestry ecological projects. The land exploitation around the urban and cultivated land was also the main cause that the vegetation coverage decreased in some areas.

关 键 词：植被覆盖度 时空变化 原因 林业生态工程 鄂西南地区 

分 类 号：S771.8[农业科学—森林工程] X87[农业科学—林学]