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. 
 

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

 

 

Message Boards

help to chose what kind of grid use for my area

YE
YAO ERIC, modified 7 Years ago.

help to chose what kind of grid use for my area

Youngling Posts: 17 Join Date: 11/16/13 Recent Posts
good morning, i am a DELFT3D new user and i have a problem with which sort of grid i have to use for my area between rectangular or circular grid and a grid obtained with spline.
i want to know what kind of grid can give me the best result (bathymetry of my area below)
thanks
Richard Measures, modified 7 Years ago.

RE: help to chose what kind of grid use for my area

Jedi Knight Posts: 178 Join Date: 3/23/11 Recent Posts
Hi,

It's hard to see the image you've posted but from what I can make out your shoreline looks quite complex. I would suggest a spline approach would give you the best results but a square grid would be quicker and easier to create - I would not recommend a circular grid.

The advantages and disadvantages of splines compared to square grids include:
  • Spline generated grids can follow shorelines and bathymetry contours
  • Spline grids can vary resolution to achieve high resolution in hydraulically complex areas or areas of interest for your study
  • Spline grids can vary resolution to achieve low resolution in simple areas or areas away from your focus to save computational effort
  • Spline grids can be time consuming to generate compared to square grids

Richard