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- W4385550406 abstract "The anomalous variation in the diversion of flow and sediment at the major bifurcation nodes of the Pearl River network in recent years has been generally recognised and accepted, yet the underlying mechanisms have not been revealed. In this study, a large-scale two-dimensional flow-sediment numerical model of the Pearl River estuary was constructed using the TELEMAC-MASCARET modelling system. Additionally, synchronous field surveys from the dry season of 2016 and wet season of 2017 were used to validate the model. The complex branches system of the Pearl River network was generalised. The theoretical models for calculating the water diversion ratio of complex estuarine river networks were proposed. The water diversion ratio at each river network node is related to the Manning’s roughness coefficient, the average cross-sectional water depth, the water surface slope, the length of the branches, and the average cross-sectional area from the river network nodes to the main estuary outlets. Specifically, the average cross-sectional water depth is the main driver of the formation of the water diversion ratios at the nodes in the Pearl River network. The sediment diversion ratios at the primary and secondary lateral branching nodes, are significantly higher than the water diversion ratios in the dry season, which explains the uneven distribution of flow and sediment. Sediment mining and reclamation are the main factors that have affected the variation in flow and sediment diversion ratios in the Pearl River network over recent decades." @default.
- W4385550406 created "2023-08-04" @default.
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- W4385550406 date "2023-08-03" @default.
- W4385550406 modified "2023-10-02" @default.
- W4385550406 title "Study on the Mechanism of the Diversion of Flow and Sediment in the Complex Estuarine River Network" @default.
- W4385550406 doi "https://doi.org/10.22541/au.169104268.86318009/v1" @default.
- W4385550406 hasPublicationYear "2023" @default.
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