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

 


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Need help/guidance for my study (tidal energy/hydrodynamic simulation)

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Need help/guidance for my study (tidal energy/hydrodynamic simulation)
delft dashboard coast hydrodynamic simulation general delft 3d tide delft 3d flow
Answer (Unmark)
8/11/17 6:16 AM
Good day.

I am Niño Jhim Andrew B. Dela Luna, a student taking M.S. in Mechanical Engineering. My master’s thesis is about tidal energy, particularly, tidal resource assessment and hydrodynamic simulation. I’m currently having some difficulty with the Delft3D software, and I hope that some of you can provide me guidance and clarity through your experience.

In general, I have a target area wherein I need to do a tidal resource energy assessment, as can be seen on Figure 1.


The blue circles denote tidal stations. My data are bathymetry, and tidal height predictions on the two tidal stations. I want to be able to create a one-month energy density map (like in Figure 2), energy prediction graph (like in Figure 3), tidal range chart (like in Figure 4), and lastly, simulate a tidal turbine (in the form of porous disc plate), in a point in my energy density map with favorable tidal energy potential. So what I’m thinking is that I need to first conduct hydrodynamic simulation to determine velocity levels and create energy density map of my target area, then conduct another simulation, with a turbine (porous disc plate) to determine the wake, turbulence, and hydrodynamic impact on the area).





Currently, I have created grid and depth files, but I’m having difficulty with the delft3D flow software, the input parameters are overwhelming and I don’t know which ones I need to factor in for my study in the Delft3D>Flow>Flow input: processes, flow conditions, initial conditions, physical and numerical parameters, etc. I’m thinking I only need to input data on the "domain" and "boundaries" and disregard the processes and parameters, but I’m not really sure as I have no past experience on this. Also, in the boundaries, do I choose Water Level, or Current, or Riemann, etc; and is the forcing type astronomic, harmonic, or time series? I don’t have data for velocity and that’s one of the things I would like to determine through Delft3D, how can I do that? Do I need to use Delft3D-Tide first? I only have data for bathymetry and tidal heights at two stations. I also saw some tutorials on Delft Dashboard regarding tidal simulations and I’m wondering if I need it for my study and what’s its difference to the Delft3D Flow software.

I don’t have any experience on modelling, much less hydrodynamic simulations, so it would really help if you could point me in the right direction, and maybe give me the steps I should take, programs I should use, and parameters to consider, to accomplish my objectives. I'm at my wits end, I've red past studies and the manuals, watched videos and screencasts, for months now, but I'm still very confused on what to do so it'd really be nice if someone can provide me some guidance. Thank you very much. .