2013~2021天津市静海区植被覆盖度时空变化分析  

Spatial and Temporal Change Analysis of Fractional Vegetation Coverage in Jinghai Area of Tianjin City From 2013 to 2021

作　　者：邵伊宁 卫亚星[1] Shao Yining;Wei Yaxing(College of Geographical Sciences,Liaoning Normal University,Dalian,Liaoning 116029,China)

机构地区：[1]辽宁师范大学地理科学学院,辽宁大连116029

出　　处：《绿色科技》2023年第17期199-203,共5页Journal of Green Science and Technology

摘　　要：植被是地球生态系统能量循环中不可缺少的一部分,植被覆盖度是揭示某一区域生态环境演变特征的重要指标,与维持生态系统稳定等息息相关。基于天津市静海区2013、2017、2021年三景Landsat8 OLI影像,采用归一化植被指数NDVI与像元二分模型等方法对该区域植被覆盖度进行研究,并结合一元线性回归趋势分析法和转移矩阵分析法对该地区植被覆盖度的时空变化开展了分析研究。结果表明:①空间分布呈东北部低、西北、南部高的特点,其中南部的植被覆盖度最高;②植被覆盖度呈现先下降后升高的趋势;③研究区整体覆盖水平上升,但仍有少部分主要是向更低等级覆盖度转移,需要多加关注、协调发展。Vegetation is an indispensable part of the energy cycle of the earth's ecosystem,and vegetation cover is an important indicator revealing the characteristics of the ecological environment evolution in a certain region,which is closely related to the maintenance of ecosystem stability and so on.In this paper,based on the 2013,2017 and 2021 Landsat8 OLI images of Jinghai District,Tianjin City,the Normalized Difference Vegetation Index(NDVI)and the Dimidiate Pixel Mode(DPM)are used to study the vegetation cover in the region.The temporal and spatial changes of vegetation coverage in this region were analyzed by the method of unitary linear regression trend analysis and transfer matrix analysis.The results show that:①the spatial distribution is characterized by low in the north-east,high in the north-west and high in the south,with the highest vegetation cover in the south;②The vegetation cover showed a trend of decreasing and then increasing;③The overall coverage level of the study area has increased,but there is still a small portion that is mainly shifted to a lower level of coverage,which requires more attention and coordinated development.

关 键 词：植被覆盖度 NDVI 像元二分模型 天津市 

分 类 号：Q948[生物学—植物学]