What tool can create gridded precipitation data from a time series

[alister.hood]

I would like to apply different rainfall time series to subcatchments in a 2D model.

I guess I could do this by creating each subcatchment as a separate 2D flow area, but that isn’t very desirable.

The other way would be by creating gridded precipitation data, and this seems like it should be fairly straightforward. But while plenty of tools can manipulate existing temporal rasters, I can’t find any tools that make it easy to create a temporal raster using a time series. It looks like I’ll have to write a Python script for QGIS, or something. But perhaps I’m just not searching for the right key words – has anyone else done something like this?

[Luis Partida]

Hi, so I know I can take Atlas 14 gridded precipitation from their website and process it in HEC-MetVue which is spatially varried for each state. But as far as creating gridded precip from a specific time series….I am not sure, I bet it could be done in MetVue as well. Documentation is not great but I would try it out

[alister.hood]

Thanks.

In the end I did it with GRASS – the workflow might not be obvious or particularly user friendly, but it seems to work well:
– create a series of rasters with r.mapcalc
– combine them into a spatio temporal raster dataset
– convert that to a 3d raster
– set correct vertical region settings with raster_3d=
– export to netcdf
I then compress the output using the tools from nco (my examples compress by a factor of 500 to 1000!). I tried compressing with cdo but HEC-RAS complained that all the data had a “duplicate timestep”.

Yes, I did look at HEC-MetVue and I think it would have also been *possible* with either it or GageInterp:
– Create times series input file with HEC-DSSVue
– Create suitable .ctl file after carefully reading GageInterp documentation (there don’t seem to be any examples) https://www.hec.usace.army.mil/software/hec-rts/documentation/GageInterp_UsersManual.pdf
– Use either HEC-MetVue “Gage2Tin” utility or GageInterp to create the temporal raster. Might need to use the same time series in more than one gage location (I’m not sure if it can use a single gage).
But this didn’t seem like a great workflow and these tools don’t support normal coordinate systems, so I would have to work in a UTM zone.

[Luis Partida]

I appreciate you sharing your work flow as so much of this kind of hidden behind unique methods. Thanks!

[Author]

Posts