宁夏沙坡头国家级自然保护区植被覆盖时空变化及其与气候因子的关系
Temporal and Spatial Variation of Vegetation Cover and Its Relationship with Climatic Factors in Ningxia Shapotou National Nature Reserve
郭佳诚 1赵星莹 2常青 2庞海威 1张玉 1郑彩之 1侯森 1耿琪康 1边振 1侯瑞萍3
作者信息
- 1. 济南大学 水利与环境学院,山东 济南 250022
- 2. 宁夏沙坡头国家级自然保护区管理局,宁夏 中卫 750021
- 3. 国家林业和草原局林草调查规划院,北京 100714
- 折叠
摘要
为了研究黄河上游干旱区植被覆盖度的变化规律,选取宁夏沙坡头国家级自然保护区为研究区,基于2002-2021年Landsat卫星遥感影像,通过趋势分析法、相关分析与偏相关分析法等,从时间和空间尺度上分析研究区近20 a归一化差值植被指数(NDVI)变化及其与气温、降水的关系.结果表明:研究区的植被覆盖度率较低,2002-2021年NDVI值呈波浪式显著增大的趋势;研究区NDVI在空间上大致呈现东高西低的特点,且NDVI与气温、降水基本呈正相关关系.
Abstract
To study the changes of vegetation coverage in the arid area of the upper reaches of the Yellow River,selecting Ningxia Shapotou National Nature Reserve as the research area,based on Landsat remote sensing images from 2002 to 2021,trend analysis,correlation analysis and partial correlation analysis were used to analyze the changes of normalized difference vegetation index(NDVI)and its relationship with temperature and precipitation in the last 20 years from the temporal and spatial scales.The results show that the vegetation coverage rate in the study area is low,and NDVI value showes a significant trend of wavy increase from 2002 to 2021.In the study area,NDVI is generally high in the east and low in the west,and there is a positive correlation between NDVI and temperature and precipitation,respectively.
关键词
植被覆盖度/归一化差值植被指数/相关性分析/气候因子/宁夏沙坡头国家级自然保护区Key words
vegetation coverage/normalized difference vegetation index/correlation analysis/climate factor/Ningxia Shapotou National Nature Reserve引用本文复制引用
基金项目
山东省自然科学基金项目(ZR2020QC173)
国家级自然保护区科技研发项目(YL-2021122101)
国家级自然保护区科技研发项目(YL-2021122102)
出版年
2024
NETL
NSTL
万方数据