Trends and Continuity Analysis of Vegetation Change in Huangshui River Basin from 2000 to 2019

doi:10.11873/j.issn.1004-0323.2022.6.1504

Remote Sensing Technology and Application

2022, Vol. 37

Issue (6): 1504-1512 DOI: 10.11873/j.issn.1004-0323.2022.6.1504

Trends and Continuity Analysis of Vegetation Change in Huangshui River Basin from 2000 to 2019

Rui Wang¹(

),Dezhen Bai¹,Fang Yin²,Lei Liu³(

)

^1.Qinghai Research and Design institute of Environmental Sciences，Xining 810000，China
^2.School of Land Engineering，Chang’an University，Xi’an 710054，China
^3.School of Earth Sciences and Resources，Chang’an University，Xi’an 710054，China

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Abstract

Vegetation change characteristics are the important contents of watershed ecological monitoring and the most critical information for environmental protection. In this study， MODIS EVI data products and Hurst index were used to analyze the temporal and spatial variation trend of vegetation in Huangshui River Basin from 2000 to 2019 and its continuity analysis. Combined with the meteorological observation data of temperature and precipitation， this paper analyzed the influencing factors of vegetation change in 9 counties and districts in Huangshui River Basin. The results show that from 2000 to 2019， the maximum annual EVI increase of vegetation in the Huangshui River Basin is 0.0063， and different counties and districts in the upper， middle and lower reaches show different change characteristics under the influence of temperature， precipitation， land use and other factors. For the annual EVI maximum， the increasing trend of the downstream is the most significant， and the change intensity of the river channel area is more obvious. Based on Hurst index analysis， the trend has a certain continuity in the short term. This study revealed the importance of vegetation monitoring trends in the plateau watershed by monitoring the temporal changes of vegetation， and provided a certain data support and scientific basis for watershed management and sustainable development.

Key words: Remote sensing Fractional vegetation cover EVI Google Earth Engine

Received: 07 April 2021 Published: 15 February 2023

ZTFLH:

TP79

Corresponding Authors: Lei Liu E-mail: 474799945@qq.com;liul@chd.edu.cn

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Cite this article:

Rui Wang,Dezhen Bai,Fang Yin,Lei Liu. Trends and Continuity Analysis of Vegetation Change in Huangshui River Basin from 2000 to 2019. Remote Sensing Technology and Application, 2022, 37(6): 1504-1512.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2022.6.1504 OR http://www.rsta.ac.cn/EN/Y2022/V37/I6/1504

Fig.1 Land use and cover of the Huangshui Basin at 2018

Fig.2 Spatial patterns of maximum EVI of 2000 and 2019 in the Huangshui Basin

Fig.3 Spatial patterns of annual maximum EVI change trend from 2000 to 2019 and the coefficient of determination R² in the Huangshui Basin

Tabel 1 Area percent of different vegetation change trend levels in the nine counties ofthe Huangshui Basin during 2000—2019

Fig.4 The change trend of annual maximum EVI of nine counties in Huangshui Basin from 2000 to 2019

Tabel 2 Correlation coefficients between averaged annual maximum EVI and meteorological parameters in different regions of Huangshui basin

Fig.5 The spatial patterns of Hurst exponent in the Huangshui Basin

Tabel 3 Area percent of different vegetation change trend levels in the nine counties of the Huangshui Basin during 2000—2019

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