Hydraulic Modelling in a Bedrock-Confined Anabranching Mekong Network - Pham Dang Tri, Van
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Flow structure of a bedrock-constrained, large river with a multi-channel network has not been well investigated. The multi-channel network of the Mekong River, was modelled using a steady 1D hydraulic model. The river network is characterized by a spatially-varying channel-form leading to significant changes in bulk flow properties between and along channels. Challenge to model bulk flow in such a remote region was the lack of ideal boundary conditions. Flow models considered both low flow, high inbank and overbank flows and were calibrated using satellite imagery and limited field data of…mehr

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Produktbeschreibung
Flow structure of a bedrock-constrained, large river with a multi-channel network has not been well investigated. The multi-channel network of the Mekong River, was modelled using a steady 1D hydraulic model. The river network is characterized by a spatially-varying channel-form leading to significant changes in bulk flow properties between and along channels. Challenge to model bulk flow in such a remote region was the lack of ideal boundary conditions. Flow models considered both low flow, high inbank and overbank flows and were calibrated using satellite imagery and limited field data of water levels. Application of the model highlighted flow characteristics of a large multi-channel network and also further indicated field data that would be required to properly characterize the flow field empirically. Important results were that adjacent channels within the network had different water surface slopes for the same moments in time; thus calibration data for modeling similar systems needs to account for these significant local differences. Further, the in-channel hydraulic roughness coefficient strongly varied from one cross-section to the next, especially during low flow.
Autorenporträt
Van Pham Dang Tri (Ph.D.) works at Can Tho University, Vietnam. With a wide range of scientific background, he focuses on integrated research with great attention to river modelling and river morphology and tries to understand possible impacts of climate change on behaviours of the different river networks (ranging from upland to deltaic ones).