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Water use efficiency (WUE) of vegetation is an important indicator for assessing the adaptability of plant ecosystems. Taking the middle reaches of the Yellow River Basin as an example, trend analysis and univariate linear regression methods were employed to analyze the spatiotemporal characteristics of evapotranspiration (ET) and water use efficiency (WUE) based on remote sensing images. The results indicate that the average annual gross primary productivity (GPP) and ET show an increasing trend, whereas vegetation water use efficiency exhibits a decreasing trend. Among different vegetation types, the values of GPP, ET, and WUE are the highest for broad-leaved coniferous forests, while grassland vegetation has the lowest values for these parameters. The order of WUE size for different vegetation types is coniferous forest > broad-leaved forest > Grass bushes > Shrubs > Cultivate vegetation > swamp > meadow > Grassland. Only swamp vegetation shows an increasing trend of 0.01/10a in WUE, while other vegetation types show a decreasing trend in WUE. Among them, grass bushes and cultivated vegetation decreased the most, with trend rates of 0.13/10a and 0.1 /10a, respectively. These studies provide a basis for regional ecological environment restoration and water resource management.

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Characteristics of Vegetation Water Carbon Use Efficiency in the Middle Reaches of the Yellow River Basin by Remote Sensing Data

  • 会议论文

  • 发表日期：

    2025年

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  • Yinge Liu,
  • Cheng Xu,
  • Yujun Hou,
  • Chuan Yao,
  • Qianhui Liu,
  • Maoqi Lin,
  • Dandan Li

摘要

Water use efficiency (WUE) of vegetation is an important indicator for assessing the adaptability of plant ecosystems. Taking the middle reaches of the Yellow River Basin as an example, trend analysis and univariate linear regression methods were employed to analyze the spatiotemporal characteristics of evapotranspiration (ET) and water use efficiency (WUE) based on remote sensing images. The results indicate that the average annual gross primary productivity (GPP) and ET show an increasing trend, whereas vegetation water use efficiency exhibits a decreasing trend. Among different vegetation types, the values of GPP, ET, and WUE are the highest for broad-leaved coniferous forests, while grassland vegetation has the lowest values for these parameters. The order of WUE size for different vegetation types is coniferous forest > broad-leaved forest > Grass bushes > Shrubs > Cultivate vegetation > swamp > meadow > Grassland. Only swamp vegetation shows an increasing trend of 0.01/10a in WUE, while other vegetation types show a decreasing trend in WUE. Among them, grass bushes and cultivated vegetation decreased the most, with trend rates of 0.13/10a and 0.1 /10a, respectively. These studies provide a basis for regional ecological environment restoration and water resource management.