Fluvial-aeolian interactions in a partly confined reach of the Yarlung Tsangpo River, Tibet
Han, Meiqin ， Brierley, Gary ， Pan, Baotian ， Geng, Haopeng ， He, Fei
2025-02-15 null null 471(卷), null(期), (null页)
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Fluvial-aeolian interactions (FAI) exert a primary influence on landscape morphodynamics in arid regions. Such processes are well studied for large-scale open systems such as dryland deserts and plains, but little is known about FAI in partly confined valley settings. Here we show how aeolian sand availability and transport pathways and connectivity relationships influence morphodynamic interactions with fluvial processes in a braided reach of the Yarlung Tsangpo River in Southern Tibet, China. Analyses of remote sensing imagery, field data, and the hydrology record show how dune fields and wind systems influence the magnitude and frequency of channel change. While the dunes along the trunk stream have limited impact on river morphodynamics, mid-channel dune fields significantly decrease the frequency of channel adjustments. Combined impacts of valley winds and mountain-valley winds create aeolian sand ramps that stimulate sediment recirculation within this landscape setting.
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