黑龙江流域植被覆盖的时空变化特征  

Temporal and spatial variation of vegetation cover in Heilongjiang basin

作　　者：张扬[1] ZHANG Yang(Harbin Normal University,Harbin 150025,China)

机构地区：[1]哈尔滨师范大学,黑龙江哈尔滨150025

出　　处：《黑龙江环境通报》2022年第4期132-135,共4页Heilongjiang Environmental Journal

摘　　要：归一化植被指数(NDVI)是表征植被长势的重要指示因子。基于中分辨率成像光谱仪(MODIS)提取黑龙江流域2011-2020年NDVI数据,利用Slope趋势分析法分析了流域内近10年植被覆盖的时间变化特征、空间分布情况和空间变化趋势。结果表明:时间变化上,近10年年均NDVI值在0.36~0.41之间波动,总体呈显著上升趋势;空间分布上,流域内NDVI值总体较高,低植被区为中国大兴安岭西部和蒙古地区;从空间变化上看,植被改善区域远大于植被退化区域,且以明显改善为主。本研究可为黑龙江流域自然景观调查提供基础数据支撑。Normalized Differential Vegetation Index(NDVI) is an important indicator of vegetation growth. Based on the Moderate Resolution Imaging Spectroradiometer(MODIS), the NDVI data of Heilongjiang Basin from 2011to 2020 were extracted. The Slope trend analysis method was used to analyze the temporal variation characteristics,spatial distribution and spatial variation trend of vegetation cover in the basin in recent 10 years. The results show that the average annual NDVI value fluctuated between 0.36 and 0.41 in the past 10 years, presenting a significant upward trend on the whole. In terms of spatial distribution, the NDVI value is generally higher in the basin, and the low vegetation area is western Greater Khingan Mountains of China and Mongolia. From the perspective of spatial change, the vegetation improvement area is much larger than the vegetation degradation area, and the vegetation improvement is significant. This study can provide basic data support for the natural landscape survey in Heilongjiang Basin.

关 键 词：植被覆盖 NDVI 黑龙江流域 时空变化 

分 类 号：Q948[生物学—植物学]