gpr-forum.com

Forum dedicated to Ground Penetrating Radar technology
It is currently Fri Nov 16, 2018 7:07 pm

All times are UTC




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Wed Mar 02, 2011 7:11 am 
Offline

Joined: Tue Feb 22, 2011 7:09 am
Posts: 4
Hi Everyone,
Have anyone used GPR to explore the layers below the water surface in a lake or pool? I have a project that aims at finding the soft bottom sediment layer (thickness) above the hard sediment bed/or bedrock. The water layer is about 5-10 m depth to the surface of bottom sediment. Is it possible to use GPR 25 MHz unshielded antenna for this project?
Advices, comments or GPR data examples of the similar project are very welcome.

Thanks,

Tripob


Top
 Profile  
 
PostPosted: Mon Mar 07, 2011 2:40 pm 
Offline
Site Admin

Joined: Fri Apr 17, 2009 7:52 am
Posts: 379
Location: Boden, Sweden
Hi,
Using GPR for sub-bottom profiling of lakes is common practice. The process of surveying the bottom of the lake or river
is called bathymetric survey. There are companies that combine the GPR with the sonar for the brackish water parts where
the GPR doesn't work well. See for instance:
http://www.art-engineering.com/Map%20In ... ge%201.htm
You may or may not be able to use your 25MHz CF antenna, it all depends on the resolution you want to obtain and the
thickness of the sedimentary layers you need to measure. In general this is a very simple and nice survey to do because
the water will produce much better data than what you are used to. I on the other hand would probably not use non-shielded
antennas for these kind of surveys.
Let us know if you have further questions.
My best regards,

_________________
Reinaldo Alvarez Cabrera
Geoscanners AB
Sweden
http://www.geoscanners.com


Top
 Profile  
 
PostPosted: Tue Mar 26, 2013 3:56 pm 
Offline

Joined: Tue Mar 26, 2013 7:51 am
Posts: 12
I want to update this topic
The Application of GPR (Ground-penetrating radar) «LOZA» in the Route Tracking of Horizontally Directed Drilling (HDD) While Crossing the Rivers
GPR profile along the length handed boreholes

http://www.flickr.com/photos/94465453@N ... /lightbox/

_________________
http://georadar-info.com
http://facebook.com/georadarinfo
http://youtube.com/georadarinfo


Top
 Profile  
 
PostPosted: Tue Mar 26, 2013 8:59 pm 
Offline
Site Admin

Joined: Fri Apr 17, 2009 7:52 am
Posts: 379
Location: Boden, Sweden
Hi Georadarinfo,
The interpretation of the obtained data is kind of creative below 10 (meters, I suppose), but I'm not used
to see GPR data presented this way. I'm sure to you it makes perfect sense.
Regards,

_________________
Reinaldo Alvarez Cabrera
Geoscanners AB
Sweden
http://www.geoscanners.com


Top
 Profile  
 
PostPosted: Tue Mar 26, 2013 11:12 pm 
Offline

Joined: Tue Mar 26, 2013 7:51 am
Posts: 12
GeoAdmin wrote:
Hi Georadarinfo,
The interpretation of the obtained data is kind of creative below 10 (meters, I suppose), but I'm not used
to see GPR data presented this way. I'm sure to you it makes perfect sense.
Regards,



Hi GeoAdmin
we are all trying to improve the final product. The purpose of of this work was to determine the favorable geological stratum drilling method HDD. In this work, the presence of wells helped hold such interpolation.

Regards

_________________
http://georadar-info.com
http://facebook.com/georadarinfo
http://youtube.com/georadarinfo


Top
 Profile  
 
PostPosted: Wed Mar 27, 2013 8:15 pm 
Offline
Site Admin

Joined: Fri Apr 17, 2009 7:52 am
Posts: 379
Location: Boden, Sweden
Hi Georadarinfo,
It is very good to make cross checks to validate the results from the GPR.
Incidentally, I was recently in the annual meeting of the Nordic Circle of GPR
and one of the aspects that was on the table was actually the necessity of
validation of GPR results. Specifically with the aid of all available methods,
there Mr. Pekka Maijala who is a legend in the GPR community was explaining the
constant task of educating new generations of GPR practitioners in the need
for validation.
Best regards,

_________________
Reinaldo Alvarez Cabrera
Geoscanners AB
Sweden
http://www.geoscanners.com


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group