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

Develop domain with varying resolution

Kristopher Calder, modified 4 Years ago.

Develop domain with varying resolution

Youngling Posts: 1 Join Date: 10/27/16 Recent Posts
Dear all,

I recently downloaded and installed an MPI NetCDF version of XBeach and happily got through all of the online tutorials. However when I came to using Xbeach for my own purposes, I have being having great difficulties in developing my mesh/domain.

To assist with the domain development I downloaded and installed Delft3D so that I could take advantage of the RGFGRID and QUICKIN utilities. Using RGFGRID I was able to create multiple domains with varying resolution. But, when I attempt to join the various domains using either the paste or merge functions, the resultant model domain always ends up very skewed/warped.

In brief, I would like to know if:

1: Anyone has a method that uses either Matlab, MIKE or Delft3D to create multiple model domains with varying grid resolution and then merging all grids to create one domain in Xbeach.

2: Can a flexible mesh /irregular grid be used in Xbeach and if so is it just as effective from an accuracy and computational efficiency perspective.

I have also attached the various domains that I created in RGFGRID if anyone would care to look at them. An attached PNG should illustrate the grids too.

Thanks for any assistance in advance.

Kind regards,