It’s common for people see geophysics as a solution, but it often isn’t that easy. The tools are not one-size-fits-all. Some work in certain circumstances and poorly, if at all in others. The equipment is expensive and thus not often available. NCKRI’s electrical resistivity system cost $82K, plus an additional $35K for some needed associated equipment. Maintenance, repair, and calibration are also costly, requiring not just money but time and expertise. Of course expertise is needed in determining which system to use, how to design your survey, and how to process and interpret the results. Then there is the difficulty with the karst features themselves. Most features I’ve found in the Balcones Fault Zone area are small and difficult to image, unless you increase the resolution of the methods which seriously drives up the costs.
All that said, geophysics are great and useful, but just not easy or cheap. George ******************** George Veni, PhD Executive Director, National Cave and Karst Research Institute (NCKRI) and President, International Union of Speleology (UIS) NCKRI address (primary) 400-1 Cascades Avenue Carlsbad, New Mexico 88220 USA Office: +575-887-5517 Mobile: +210-863-5919 Fax: +575-887-5523 gv...@nckri.org<mailto:gv...@nckri.org> www.nckri.org<http://www.nckri.org/> UIS address Titov trg 2 Postojna, 6230 Slovenia www.uis-speleo.org<http://www.uis-speleo.org/> From: Texascavers <texascavers-boun...@texascavers.com> On Behalf Of Carol W Russell Sent: Monday, July 29, 2019 14:20 To: texascavers@texascavers.com Subject: Re: [Texascavers] MOPAC extension meets "karst features" This bothers me. Should there not be remote sensing surveys required to identify underground voids BEFORE starting work building highways and pipelines? Surely there are plenty of experts, including cavers in our area, that are able to do that. Carol On Sat, Jul 27, 2019 at 1:02 PM Don Cooper <wavyca...@hotmail.com<mailto:wavyca...@hotmail.com>> wrote: I'm surprised it took them this long to dig open a cave. I think I've seen other surface features in that area. ________________________________ From: Texascavers <texascavers-boun...@texascavers.com<mailto:texascavers-boun...@texascavers.com>> on behalf of Crash Kennedy <cavercr...@gmail.com<mailto:cavercr...@gmail.com>> Sent: Saturday, July 27, 2019 11:20 AM To: CaveTex <texascavers@texascavers.com<mailto:texascavers@texascavers.com>> Subject: Re: [Texascavers] MOPAC extension meets "karst features" I took the liberty of cropping out all the unrelated stuff. Enjoy! Jim _______________________________________________ Texascavers mailing list | http://texascavers.com Texascavers@texascavers.com<mailto:Texascavers@texascavers.com> | Archives: http://www.mail-archive.com/texascavers@texascavers.com/ http://lists.texascavers.com/listinfo/texascavers
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