intro story Coast / Estuary

Coast / Estuary

Coastal systems are among the most dynamic physical systems on earth and are subject to a large variety of forces. The morphodynamic changes occurring to coastlines worldwide are of great interest and importance. These changes occur as a result of the erosion of sediments, its subsequent transport as bed load or suspended load, and eventual deposition. 
Estuaries are partly enclosed water bodies that have an open connection to the coast. Estuaries generally have one or more branching channels, intertidal mudflats and/or salt marshes. Intertidal areas are of high ecological importance and trap sediments (sands, silts, clays and organic matter).
Within the Delft3D modelling package a large variation of coastal and estuarine physical and chemical processes can be simulated. These include waves, tidal propagation, wind- or wave-induced water level setup, flow induced by salinity or temperature gradients, sand and mud transport, water quality and changing bathymetry (morphology). Delft3D can also be used operationally e.g. storm, surge and algal bloom forecasting. 
On this discussion page you can post questions, research discussions or just share your experience about modelling coastal and/or estuarine systems with Delft3D FM. 




Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems



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the simulation of sediment erosion and deposition

Xiaoya Zhang, modified 4 Months ago.

the simulation of sediment erosion and deposition

Youngling Posts: 7 Join Date: 9/8/19 Recent Posts
Hi  everyone,
I am making a Delft3D two-dimensional sediment model(non-cohesive sediments) to simulate the changes of riverbed scouring and silting in the flume test, 
but the result is very small and does not conform to the test result. Is Delft3D suitable for the channel in the simulation flume? And I don't understand why the 
sediment transport parameter setting at the boundary has no effect on the final result of erosion and deposition.
Another problem is that in the simulation of sediment erosion and deposition, there will be concave bank deposition and convex bank erosion, there may not even be siltation,which is not consistent with the fact. Can someone help me solve this problem?
Any feedback would be very helpful.
Thanks in advance for your time and answer.