Kinsey Hoffman
Question, Rob: where does RIVERSEG JL7_7070_0001
drain to?
11:57 AM
Robert Burgholzer
Good question - well, you mean other than the bay? seriously, I think that is the outlet of the James (last non-tidal) - will verify and get back
11:58 AM
Kinsey Hoffman check out my screen though - that river segment is right in the middle of the major basin
11:59 AM
Robert Burgholzer
12:00 PM
Yeah, but that is actually the Fall line, in other words, everything below there is subject to tidal influence'
Kinsey Hoffman
Oh boy
12:00 PM

Yup, every river segment below that says it drains to '0000' or '0001'
So how do I represent those HUCs?
Robert Burgholzer
12:00 PM
Yeah, it's really messy, and we only have a rudimentary understanding about what it means to pump water our of those
Represent the HUC with 7070 as it's outlet
It's as good as we can do, and it cinforms to our current understanding of the critical resource area
Kinsey Hoffman
12:01 PM
And then what happens if a river segment that isn't at the end of the HUC boundary says it drains to
0001? i.e. JA5_7480_0001
"George F. Brasfield Dam"
Robert Burgholzer
12:03 PM
The designation "0001" means that it is a segment that has a channel simulation that then dumps into a tidal area. Brasfield is one that we actually will use as a second HUC outlet (like in Roanoke). There may be others belkow that, but I think brasfield will be the only one
Good catch
Kinsey Hoffman
Okay, I can include Brasfield Dam segment as an outlet, but then do I also use JA5_7460_0000?
12:05 PM

All 3 of those river segments below Brasfield Dam drain to 0000 or 0001
Robert Burgholzer
12:06 PM
Mmmmm. Let me think
Let's do this: use a single outlet, being segment "JB0_7074_0000 " - this will capture both mainstem of
James and Appomattox, and is probably a good thing since it is an area that has a TMDL for algae that is affected by flows
Thansk for thinking this through with me
Kinsey Hoffman
THat's in HUC 02080206 though
12:09 PM
Robert Burgholzer shoot.
12:10 PM
Kinsey Hoffman
But it is visibly the basin that 02080207 drains into.
12:11 PM

Robert Burgholzer
OK, are there any olthers above that in 02080206 or is that it?
Kinsey Hoffman
Yes, there's 3 segments above it
They all "drain" to 0000 though
Robert Burgholzer
So what is the last segment in the Appomattox that drains to 02080207? and what is the last James segment in 02080207?
Kinsey Hoffman
Okay this is going to get confusing
02080206 is actually up-river of 02080207
Robert Burgholzer
12:11 PM
12:12 PM
12:12 PM
12:13 PM
12:13 PM

Appomattox segments have their own minor basin "JA"
Kinsey Hoffman
The last segment of Appomattox, visibly in GIS, is JA5_7460_0000
That is the last segment in 02080207
Robert Burgholzer
ANd what is the last one in the James?
In 02080207 that is
Kinsey Hoffman
02080207 is appomattox
02080206 is James
(it's backwards I know)
It looks like the end of the James is JB0_7580_0000
Which is HUC 02080208
12:14 PM
12:17 PM
12:17 PM me
12:20 PM
Sorry to jump into the current conversation, but quick question about the URL that gives me HUC ids based on a minor basin. I used PU for Upper Potomac and only got one HUC id back but that HUC was already used in the Shenandoah. Here's the URL I used: http://deq2.bse.vt.edu/wooomm/remote/get_modelData.php?variables=huc&scenarioid=37&querytype=cb p_minor&operation=7&params=PU&custom1=cova_ws_container,cova_ws_subnodal&debug=1

Robert Burgholzer
Kinsey - how many HUC's are there in the James?
12:20 PM
Kinsey Hoffman
9
02080205
02080201
02080202
02080108
02080206
02080203
02080207
02080208
02080204
12:21 PM
Robert Burgholzer
12:22 PM
Lindsay - You may wish to ask Kinsey, the script might give dupes, but if you recall, there was one HUC that we thoguht was in Shen that was actually Upper Potomac - let's verify together
Kinsey Hoffman
We just figured it out, all good on the URL script
12:22 PM

Robert Burgholzer
12:22 PM
Cool - thanks
Now, in terms of the James, we decide on the last HUC that is non-tidal James (somewhere near
JL7_7070_0001), the rest of the James HUC's below that have NO outlet, as they are all very tidal me
12:24 PM
Rob - Kinsey clarified it for me. You said to run data analysis for Upper Potomac and there's only one
HUC there that is in VA. Is this correct? So, after this one HUC, I move onto maps? I just thought there were more
Robert Burgholzer
12:26 PM
Well,
I get 74 model segments in the Upper Potomac, but it's quite possible that most of them are outside of
Virginia - meaning there ARE HUC's, just not ones that we will be quantifying. :Let's just verify that this is indeed the case on Kinseys maps. Thanks!
Kinsey Hoffman
You're right - most of PU is outside of VA
12:27 PM

Robert Burgholzer
Awesome - thanks!
12:27 PM
Kinsey Hoffman
So should she use just that HUC in VA to represent it? with graphs, etc
12:28 PM
Robert Burgholzer
12:29 PM
Yup. We will need to do a summary of the stuff that occurs outside of VA however. The "cumulative" or
"upstream" withdrawal columns will address that, but we might need to go further later on.
That New River one that you are looking at might need an outside of VA HUC map to figure out all the routing... thought?
Kinsey Hoffman
12:32 PM
That one down on teh other side of Shenandoah (the small one that we were just looking at) is part of PU me

12:33 PM
The 020070001 huc is also part of the Upper Potomac, but isn't listed in the URL. Both HUCs for PU are headwaters that leave VA
Even though 02070001 is not on the PU URL, should I model it?
Robert Burgholzer
12:34 PM
Ahhh. ok - we need to create 02070001 HUC then. You can query for only the elementid BTW (what we originally did) - let me know the riversegment and I will give yo uthe elementid
Kinsey Hoffman
02070001: PU2_5700_5210, PU0_6080_5620, PU2_6050_5190
I already entered that into the Drupal view so shouldn't that HUC exist?
12:35 PM
Robert Burgholzer
12:36 PM
Well, it's entuirely possible that the script, which uses a GIS intersection algorithm may miss some small areas. Which is why we have the human supervision aspect
Kinsey Hoffman
Haha exactly!
12:37 PM

Robert Burgholzer
Question is, does that query for that HUC give the elements?
Kinsey Hoffman
Checking now
Robert Burgholzer
Thanks!
Kinsey Hoffman
The script spits out zero segments in that HUC
Look at Lindsay's screen
Robert Burgholzer
OK - will investigate
12:37 PM
12:37 PM
12:37 PM
12:39 PM
12:40 PM