Using National Hydrography Dataset Flowlines.

[KGBrennan]

Hi MiKatt, I am interested in a work around for using existing flowline data sets (e.g., the NHD). What would be a recommended work around to have openSTARS use these flow lines instead of generating streams based on dem and burning? There is a lot of added attributes (value added attributes) in this national data system and it would be nice to be able to use them.

Thanks!

[jpierkunke]

I also am looking for this functionality; I would like to use the NSI flowlines and prediction points and add some additional attributes from NHDPlus: https://www.fs.usda.gov/rm/boise/AWAE/projects/NationalStreamInternet/NSI_network.html

I believe the stream line and prediction point datasets have already been cleaned so there should be no complex confluences; there are just some duplicate COMIDs which I would want to drop before building the LSN.

[jpierkunke]

Thank you for developing this package!

[jpierkunke]

Thank you, I will check this out!

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On Thu, Jul 20, 2023 at 12:03 PM Matthew Bayly ***@***.***> wrote: Hi, for anyone new to this stuff a put together a walk through video tutorial for setting up MiKatt/openSTARs on a Windows environment: https://youtu.be/eKFeO1Dhvt8 — Reply to this email directly, view it on GitHub <#38 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKJ54UFTL5CHGFULA7WLSNDXRF6H3ANCNFSM6AAAAAA2C6JPT4> . You are receiving this because you commented.Message ID: ***@***.***>

[aaronRcarr]

Hi @KGBrennan and @jpierkunke,

I was wondering if either of you found a work-around for using NHD flowlines and would be willing to share?

Thanks!

[mattjbayly]

Hi Aaron (& others working on a similar project),

I'd try the following:

• If you are working with the USGS NHD streamlines, check resources available on the NOAA/Rock Mt Research Station website to see if an SSN object has already been created for your study area as part of the NorWeST stream temperature project (https://www.fs.usda.gov/rm/boise/AWAE/projects/SSN_STARS/software_data.html); https://www.fs.usda.gov/rm/boise/AWAE/projects/NorWeST.html). See if you can re-purpose.
• If you need to use pre-existing vector geometry in another jurisdiction, I would suggest either using the ESRI STARs toolbox or generating the SSN inputs with custom code. I think openSTARS has some functionality to help with this, but I'm not sure that it's complete.
• I have previously generated SSN objects with custom code for British Columbia (with the BCFWA) and the parts of the Northwest Territories in Canada (Canada NHN), but code to setup those objects isn't readily transferable to the USGS NHD+ streamlines... I'd only recommend custom code if someone is extremely proficient in R or Python.