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



Message Boards

water quality calibration

Anonymous, modified 4 Years ago.

water quality calibration

Posts: 1
Hi there,

I've been getting mix review on how to calibrate water quality model. Some say to leave all parameters at boundary to be zero and some seem to say to inject some concentration at the boundary. Are these both options correct? or is one option more advisable than the other?

Wouldn't setting zero concentration at the boundary just causes specific parameter to decay until it reaches zero? or would it reach an equilibrium at some stage.

Thanks for helping emoticon
Arjen Markus, modified 4 Years ago.

RE: water quality calibration

Jedi Knight Posts: 223 Join Date: 1/26/11 Recent Posts
This very much depends on the problem you are trying to study:
- If there are no sources inside the model, the exchange over the boundary will cause it to disappear from the model in the long run
- For substances like salinity, a useful boundary condition depends on whether your model represents a marine environment or a freshwater environment
- etc.

Could you describe the modelling problem you are studying? Also, the term calibration is usually used for finding the right values for process parameters and the like, whereas from your description I get the impression that you are looking for the way to set up your model, based on - probably - a small amount of field data only.