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Recent intensified erosion and massive sediment deposition in Tibetan Plateau rivers

Author

Listed:
  • Jinlong Li

    (Sichuan University)

  • Genxu Wang

    (Sichuan University)

  • Chunlin Song

    (Sichuan University)

  • Shouqin Sun

    (Sichuan University)

  • Jiapei Ma

    (Sichuan University)

  • Ying Wang

    (Sichuan University)

  • Linmao Guo

    (Sichuan University)

  • Dongfeng Li

    (Peking University)

Abstract

Recent climate change has caused an increase in warming-driven erosion and sediment transport processes on the Tibetan Plateau (TP). Yet a lack of measurements hinders our understanding of basin-scale sediment dynamics and associated spatiotemporal changes. Here, using satellite-based estimates of suspended sediment, we reconstruct the quantitative history and patterns of erosion and sediment transport in major headwater basins from 1986 to 2021. Out of 13 warming-affected headwater regions, 63% of the rivers have experienced significant increases in sediment flux. Despite such intensified erosion, we find that 30% of the total suspended sediment flux has been temporarily deposited within rivers. Our findings reveal a pronounced spatiotemporal heterogeneity within and across basins. The recurrent fluctuations in erosion-deposition patterns within river channels not only result in the underestimation of erosion magnitude but also drive continuous transformations in valley morphology, thereby endangering local ecosystems, landscape stability, and infrastructure project safety.

Suggested Citation

  • Jinlong Li & Genxu Wang & Chunlin Song & Shouqin Sun & Jiapei Ma & Ying Wang & Linmao Guo & Dongfeng Li, 2024. "Recent intensified erosion and massive sediment deposition in Tibetan Plateau rivers," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-44982-0
    DOI: 10.1038/s41467-024-44982-0
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