RE: suspended sediment and salinity from FLOW to WAQ? - Home - Delft3D
RE: suspended sediment and salinity from FLOW to WAQ?
I am a beginner on DELWAQ. I want to know that when doing the coupling between FLOW and WAQ, can the suspended sediment (cohesive) and salinity be imported directly from FLOW results to WAQ? From the user manual and some discussions here, it looks like temperature can be imported directly. Has anyone tried salinity and/or suspended sediments?
Ben Williams, modified 1 Year ago.Jedi Knight Posts: 114 Join Date: 3/23/11 Recent Posts
I'm pretty certain WAQ imports salinity and temperature from FLOW, perhaps just as density field, as ambient water density is needed in order to simulate outfalls in WAQ. However I am not aware of any capability to import sediment quantities from MOR (via FLOW) to WAQ.
WAQ does have a sediment transport module, albeit much simpler than MOR in terms of physics and numbers of sediment fractions considered.
Are you interested in using suspended sediment concentration to estimate light extinction?
Arjen Markus, modified 1 Year ago.Jedi Knight Posts: 222 Join Date: 1/26/11 Recent Posts
As for salinity: if the hydrodynamic calculation includes salinity, then this will be exported by the builtin coupling (or by the external coupling program) as a file with the extension ".sal". Likewise: the temperature is in a file with extension ".tem", the vertical diffusion coefficient in ".vdf" and the shear stress in a file ".tau". These quantities can be imported as so-called segment functions. (It would be possible to do this for the sediment concentrations as well, but as I stated above, the need has never arisen.)
Zhanxian Wang, modified 1 Year ago.Padawan Posts: 35 Join Date: 4/11/12 Recent Posts
Thanks for the quick response. The study I have includes cohesive sediment related channel morphological change and cohesive sediment related water quality. I definitely will run FLOW model with salinity and cohesive sediment; however, for the water quality model, I want to avoid to calculate cohesive sediment again if I can transfer it from the FLOW model. Will I get the same cohesive sediment concentration in the water column from DELWAQ as the FLOW model if I use the same model grid and sediment characteristics?
From the coupling WAQ output from FLOW model, there are several files that look like related to sediment as shown in the attached figure: *.sed01, *.resflx01, *.sedflx01. What are these files? If they are related to sediment, can they be used directly in DELWAQ as inputs similar to salinity and temperature?
Gholamreza Shiravani, modified 4 Months ago.Padawan Posts: 53 Join Date: 6/25/16 Recent Posts
did you find finally the solution to Import Sediment concentration from D-FLOW to WAQ? After coupling I have the corresponding file for all Parameters except of Sediment? How did you couple the Sediment files to use in WAQ? I will be appreciate if you answer my question.
Gholamreza Shiravani, modified 3 Months ago.Padawan Posts: 53 Join Date: 6/25/16 Recent Posts
Hi Markus, could you tell me then how will Delwaq realize a segment, which is already filled with sediment in Morph, should excluded from computations in Delwaq? I mean, Delwaq without Morph and sediment modules from FLOW can not practically provide right results!
Arjen Markus, modified 3 Months ago.Jedi Knight Posts: 222 Join Date: 1/26/11 Recent Posts
I think you misunderstand something here: MOR is about the transport of sand (and other non-cohesive sediment), whereas DELWAQ is about cohesive sediment, so silt, mud, clay particles, also fine particulate organic material. The transport phenomena involved are quite different.