21世纪初舟曲县植被变化特征分析

Analysis of Vegetation Change Characteristics in Zhouqu County in Early 21st Century

利用MOD13A3数据、DEM数据、土地分类覆盖数据,分析了舟曲县植被时空分布特征,并利用气象资料探讨了其对气候变化的响应。结果表明:舟曲县植被呈西多东少的分布特征,植被覆盖整体上呈增加趋势,其中白龙江沿岸、拱坝河南部沿岸及舟曲中东部部分区域植被增加明显。舟曲降水量变化对植被的影响较明显,气温变化对植被的影响较弱。舟曲森林、灌丛面积呈增加趋势,草原、湿地面积呈下降趋势,植被类型的变化与人类活动关系密切。

The MOD13A3 data,DEM data and land classification coverage data were used to analyze the temporal and spatial distribution characteristics of vegetation in Zhouqu County,and discussed the climate change response by using meteorological data.The results showed that the vegetation in Zhouqu County was more in the western region and less in the eastern region.The whole vegetation coverage in Zhouqu County was increasing.Among them,the vegetation along the Bailong River,the south coast of the Gongba River and some areas in the middle east of Zhouqu increased significantly.The change of precipitation in Zhouqu had obvious influence on vegetation,while the change of temperature had weak influence on vegetation.The area of forests and shrubs in Zhouqu was increasing,while the area of grasslands and wetlands was decreasing.The change of vegetation types was closely related to human activities.