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首页> 外文期刊>Proceedings of the International Association of Hydrological Sciences >Analysis of vegetation condition and its relationship with meteorological variables in the Yarlung Zangbo River Basin of China
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Analysis of vegetation condition and its relationship with meteorological variables in the Yarlung Zangbo River Basin of China

机译：雅鲁藏布江流域植被状况及其与气象变量的关系分析。

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摘要

The Yarlung Zangbo River Basin is located in the southwest border of China, which is of great significance to the socioeconomic development and ecological environment of Southwest China. Normalized Difference Vegetation Index (NDVI) is an important index for investigating the change of vegetation cover, which is widely used as the representation value of vegetation cover. In this study, the NDVI is adopted to explore the vegetation condition in the Yarlung Zangbo River Basin during the recent 17?years, and the relationship between NDVI and meteorological variables has also been discussed. The results show that the annual maximum value of NDVI usually appears from July to September, in which August occupies a large proportion. The minimum value of NDVI appears from January to March, in which February takes up most of the percentage. The higher values of NDVI are generally located in the lower elevation area. When the altitude is higher than 3250?m, NDVI began to decline gradually, and the NDVI became gradual stabilization as the elevation is up to 6000?m. The correlation coefficient between NDVI and precipitation in the Yarlung Zangbo River Basin is greater than that with temperature. The Hurst index of the whole basin is 0.51, indicating that the NDVI of the Yarlung Zangbo River Basin shows a weak sustainability.
机译：雅鲁藏布江流域位于中国西南边界，对西南地区的社会经济发展和生态环境具有重要意义。归一化植被指数（NDVI）是调查植被覆盖度变化的重要指标，被广泛用作植被覆盖度的表示值。本研究采用NDVI技术来探讨雅鲁藏布江流域近17年来的植被状况，并探讨了NDVI与气象变量之间的关系。结果表明，NDVI的年最大值通常出现在7月至9月，其中8月占有很大比例。 NDVI的最小值出现在1月到3月，其中2月占据了大部分百分比。 NDVI的较高值通常位于较低的海拔区域。当海拔高于3250？m时，NDVI开始逐渐下降，当海拔高达6000？m时，NDVI逐渐稳定。雅鲁藏布江流域NDVI与降水的相关系数大于温度。整个流域的赫斯特指数为0.51，表明雅鲁藏布江流域的NDVI表现为较弱的可持续性。

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