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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RE: Domain decomposition boundaries?

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Domain decomposition boundaries?
domain decomposition pre-processing estuary modeling coastal modeling
Answer (Unmark)
11/1/17 7:08 PM
New user here. We are attempting to run a 3-domain model of a coastal channel emptying into a large gulf. We have successfully run it as a single-domain model but want to improve the time efficiency. When we split it into 3 domains, each of them runs when tested individually, but when attempting to couple them along DD-boundaries, it just won't work. We have attempted several possible fixes but none so far have worked, so there is obviously a misunderstanding on our part regarding exactly how to define the boundaries.

The main error that we are getting says "Wrong coupling point at (2,155) Kcs=0 KcsInside=0", but as far as we understand from the manuals and examples we have set up the boundaries properly. What does this error mean?

Kind of lost here, so any help is appreciated!
RE: Domain decomposition boundaries?
Answer (Unmark)
11/13/17 9:55 PMas a reply to A M.
It seems like a curvilinear grid rather than a strictly rectangular grid solves the problem.