How Do Bifurcations in Engineered Rivers Respond to Sea Level Rise?
M.K. Chowdhury (TU Delft - Rivers, Ports, Waterways and Dredging Engineering)
A Blom (TU Delft - Rivers, Ports, Waterways and Dredging Engineering)
C. Ylla Arbos (TU Delft - Rivers, Ports, Waterways and Dredging Engineering)
R.M.J. Schielen (TU Delft - Rivers, Ports, Waterways and Dredging Engineering, Rijkswaterstaat)
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Abstract
River bifurcations divide the water and sediment over two downstream branches or bifurcates. As the changing climate adjusts the boundary conditions (i.e., base level, hydrograph, and sediment flux) for bifurcations, it will affect their flow and sediment partitioning over the bifurcates. Our objective is to provide insight into the response of a bifurcation to sea level rise (SLR). To this end, we compare the response of an idealized bifurcation in an engineered river (i.e., with a fixed planform and width) to SLR to the one of a single channel, using a one-dimensional numerical model system.