Spatiotemporal evolution of vegetation water-use efficiency in the Yunnan-Guizhou Plateau, China

Xuepeng Zhang; Taixia Wu; Yingshuang Huang; Ninglei Ouyang; Yang Liu; Wei Nie

doi:10.1117/12.3057486

28 January 2025 Spatiotemporal evolution of vegetation water-use efficiency in the Yunnan-Guizhou Plateau, China

Xuepeng Zhang, Taixia Wu, Yingshuang Huang, Ninglei Ouyang, Yang Liu, Wei Nie

Author Affiliations +

Proceedings Volume 13506, Sixth International Conference on Geoscience and Remote Sensing Mapping (GRSM 2024); 135063B (2025) https://doi.org/10.1117/12.3057486
Event: Sixth International Conference on Geoscience and Remote Sensing Mapping (ICGRSM 2024), 2024, Qingdao, China

Abstract

Aiming to investigate the evolution in vegetation water use efficiency (WUE) in the Yun-Gui Plateau over the past 22 years. This study estimated the WUE in this region from 2001 to 2022 using the Google Earth Engine. The Theil-Sen, Mann-Kendall, and coefficient of variation methods were employed to explore the spatiotemporal evolution of WUE in the Yun-Gui Plateau. The results showed that: (1) WUE in the Yun-Gui Plateau has been fluctuating but showing an increasing trend, with an average value of 3.01 g C kg^-1 H2O. (2) Regions with significant and slight decreases in WUE are mainly distributed in the southwest, while regions with significant increases are mainly found in the central part, and regions with slight increases are predominantly located in the northeast. Most areas exhibit a stable trend in annual average WUE. (3) WUE in shrublands and grasslands is decreasing, while other vegetation types show an increasing trend. The research findings have scientific reference value for the improvement of the ecosystem structure and function in the region.

(2025) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xuepeng Zhang, Taixia Wu, Yingshuang Huang, Ninglei Ouyang, Yang Liu, and Wei Nie "Spatiotemporal evolution of vegetation water-use efficiency in the Yunnan-Guizhou Plateau, China", Proc. SPIE 13506, Sixth International Conference on Geoscience and Remote Sensing Mapping (GRSM 2024), 135063B (28 January 2025); https://doi.org/10.1117/12.3057486

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