What an opportunity. A chance to walk the karst in the vicinity of the world
famous Devil's Sinkhole, the star of Bulletin 10, one of my prized caving pubs.
That would really be fun.
But, sorry we cannot make it as going full steam so we can escape to the
convention in NM.
See you there.
Preston Forsythe
Browder, KY
On Thursday, June 1, 2017 8:24 AM, Geary Schindel via Texascavers
<texascavers@texascavers.com> wrote:
Folks,
I’ve been working on a tracer testing project near Rocksprings, Texas over the
last couple of months. We’re partnered with UT-San Antonio, Devils Sinkhole
State Natural Area, Nueces River Authority, Real Edwards Conservation District,
TTU – Junction, and local landowners. Our interest is to test the groundwater
boundaries between the Llano and Nueces River basins. The surface water basin
is located on the ridgeline east of Rocksprings that generally follows highway
377 from Rocksprings east to the junction with Highway 41. The groundwater
divide may be much further north and in the Llano River Watershed. It is not
uncommon for groundwater and surface water boundaries to not agree. This may
explain the presence and size of the Devils Sinkhole since it is relatively
close to the surface water divide and also implies there is a large conduit and
cave system at depth feeding the springs on the Llano and Nueces rivers. The
identification of the groundwater boundary is important in calculating recharge
contributions for the Trinity and Edwards Aquifer groundwater models to obtain
an accurate water balance.
We’ve had problems finding suitable injection points in the area for dye
tracing. We have good coverage of the potential discharge points (springs and
wells) but need to find some caves or sinkholes we can use for the injection of
dye.
We have started one tracer test from Devils Sinkhole but the results have been
inconclusive as we probably didn’t use a sufficient quantity of dye. We plan on
repeating the tracer test in Devils Sinkhole in the very near future. We also
have access to a large ranch on Sunday to walk the drainages to the north of
Route 377. The thought is that there may be some small sinkholes or caves on
the property that would allow us to inject water for a dye trace. What I need
is the critical eye of cavers to help identify said features.
So, I’m looking for some help from cavers to come out on Sunday (June 4) and
walk the property and evaluate karst features. While I can’t pay you or even
cover your costs, I can offer an interesting opportunity and potential for new
caves, participation in some interesting science, the undying gratitude of the
citizens of the Nueces and Llano River basins, and the sense of accomplishment
of a job well done (what more could you ask for).
If you’re interested in helping, please send me an email at
gschin...@edwardsaquifer.org<mailto:gschin...@edwardsaquifer.org> or call me at
210.326.1576 (cell) and I can fill you in on the details.
Thanks,
Geary
[https://ucarecdn.com/cfe99bfa-9ee9-4330-862f-aee807af1b4c/-/resize/132x68/img.png]<http://www.edwardsaquifer.org/>
Geary Schindel
Chief Technical Officer
www.edwardsaquifer.org<http://www.edwardsaquifer.org/>
210.222.2204 ext 346
900 E Quincy
San Antonio, TX 78215
[https://app.zippysig.com/social-icons/24/000055/03facebook.gif]<https://www.facebook.com/TheEdwardsAquifer/?sk=wall>
[https://app.zippysig.com/social-icons/24/000055/03twitter.gif]
<https://twitter.com/EdwardsAquifer>
[https://app.zippysig.com/social-icons/24/000055/03youtube.gif]
<https://www.youtube.com/edwardsaquiferauthorityeaa>
--
You received this message because you are subscribed to the Google Groups
"Bexar Grotto" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to
bexargrotto+unsubscr...@googlegroups.com<mailto:bexargrotto+unsubscr...@googlegroups.com>.
For more options, visit https://groups.google.com/d/optout.
_______________________________________________
Texascavers mailing list | http://texascavers.com
Texascavers@texascavers.com | Archives:
http://www.mail-archive.com/texascavers@texascavers.com/
http://lists.texascavers.com/listinfo/texascavers
_______________________________________________
Texascavers mailing list | http://texascavers.com
Texascavers@texascavers.com | Archives:
http://www.mail-archive.com/texascavers@texascavers.com/
http://lists.texascavers.com/listinfo/texascavers
