Water quality analysis with unsteady flow error

[Anonymous]

We are running the unsteady state simulations without problem. Once it is finished I am able to see all the results. I am running 1 year (01Oct2009-30Sep2010, 1 min computation interval and 1 day output interval) and it generates a .hyd02 file of 14 Gb. Then I try to run the water quality module and it appears an error that the .hyd02 has a bad file name or number and in the computations screen it appears that there is no .hyd02 file to read, that I need to run the unsteady flow analysis again (and I can see the file in the computation output). If I do the same procedure for example for 1 month, this error it does not appear, and the water quality analysis runs correctly.
Any ideas?

[Anonymous]

I’m not sure that RAS is fully able to handle large files yet. So the 14Gb file might be the problem since the 1 month runs ok. So to use the water quality you might have to keep the size of the output down.

I’m not familiar with water quality. For the unsteady run, you could break it up into say monthly runs. Write out a restart file and then use the restart file for the initial conditions for the next month. Not sure how that would work with WQ.

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