Author(s): Saeed Hashemikia; Alemu Tezera Dessie; Greet Deruyter; Tom De Mulder
Linked Author(s): Tom De Mulder
Keywords: Open-channel confluence; Backwater effects; Upstream-to-downstream water depth ratios; 1D open-channel network model
Abstract: Analytical junction relations are needed in 1D open-channel network models to predict the upstream-to-downstream water depth ratios over the junctions. Most analytical models for asymmetric open-channel confluences only apply when the downstream-to-upstream width ratio is one and assume equal water depth ratios for the lateral branch and the main channel. Both limitations are overcome by the model of Shabayek or the Luo variant thereof. The performance of both versions is assessed against a recently published, large dataset produced by a 3D numerical model for geometries with width discordance. Both analytical model versions have a quite similar performance, with an average (resp. maximum) deviation of the water depth ratios of 1% (resp. 3%) against the 3D numerical data.
Year: 2024