Re: [swanmodel-users] Specifying boundary conditions from spectral file with multiple points in time

[João A. <ja...@au...>]

Hello Jose,

Almost the same problem here. After giving up on BOUNDNEST1 for the same
reason, I am currently generating all the outputs, point by point with
SPECOUT and adding the boundaries with BOUNDSPEC.


On Fri, 2 Nov 2018 at 16:01, José Beyá via swanmodel-users <
swa...@li...> wrote:

> Hi all,
>
> I am running SWAN using a time varying spectral boundary condition that
> comes in a file which has 6 points located approximately along the Eastern
> Boundary. There is a year of data every 3h.
>
> I am specifying the boundary conditions like this:
>
> BOUNdspec SIDE N CCW CONstant FILE 'nzn.20100101_00z_1.bnd' 6
> BOUNdspec SIDE S CCW CONstant FILE 'nzn.20100101_00z_2.bnd' 1
> $******EASTERN BOUNDARY
> BOUNdspec SEGMent XY 1884100 5491900 1884100 5519700 CONStant FILE
> 'nzn.20100101_00z_3.bnd' 1
> BOUNdspec SEGMent XY 1884100 5519700 1884100 5575300 CONStant FILE
> 'nzn.20100101_00z_4.bnd' 2
> BOUNdspec SEGMent XY 1884100 5575300 1884100 5630900 CONStant FILE
> 'nzn.20100101_00z_5.bnd' 3
> BOUNdspec SEGMent XY 1884100 5630900 1884100 5686500 CONStant FILE
> 'nzn.20100101_00z_6.bnd' 4
> BOUNdspec SEGMent XY 1884100 5686500 1884100 5742100 CONStant FILE
> 'nzn.20100101_00z_7.bnd' 5
> BOUNdspec SEGMent XY 1884100 5742100 1884100 5769900 CONStant FILE
> 'nzn.20100101_00z_8.bnd' 6
> $******
>
> Although this works, it requires to copy and rename the file which has the
> spectral boundary data (nzn.20100101_00z_1.bnd)  8 times. This is because
> if you use the same file for more than 2 lines with the command BOUNdspec
> it produces the error "File already Opened". This also happens when you use
> a TPAR file.
>
> I explored using the option VARIABLE instead of CONSTANT for the BOUNdspec
> command but it still requires to have different files and it can only be
> used for one Boundary at the time.
>
> I also explored using the BOUNDNEST1 command and the model runs but
> produces wrong results as it only has 6 points along the boundaries while
> it requires several hundreds (it seems it does not interpolate).
>
> I am wandering if anyone is aware of a smarter way of specifying the
> boundary condition in this situation in order to avoid having to create
> several identical wave spectra data files.
>
> Thanks in advance
>
> Jose
>
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-- 
João Claudio Albuquerque
PhD. Candidate, School of Environment, The University of Auckland,
Level 4, Room 449, Science Centre, 23 Symonds Street, Auckland, NZ.
+64 021 02365705