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Paper Abstract and Keywords
Presentation 2013-11-22 16:45
Three-dimensional analysis of subsiding ground -- A comparison of results using GPR-Slice and ArcGIS --
Donald M.Thieme (VSU), Benjamin Davis (FSU), Can Denizman (VSU) SANE2013-65
Abstract (in Japanese) (See Japanese page) 
(in English) Subsurface anomalies related to subsidence of the ground beneath a house in south Georgia, USA were identified using a MAL?M 100 MHz GPR System on a 28 m x 51 m grid. Areas of both active and inactive subsidence ranging from 10 m2 to 25 m2 in size were evident as depressions on the land surface and in many of the GPR profiles. After minimal processing with RadExplorerTM to correct for time zero, remove DC electrical noise, and gain signal with depth, we cut ?time-slices? through the entire grid of 28 profiles using GPR-SliceTM. Twenty slices with a thickness of 11.5 ns were cut from the data collected between 23 and 192 ns. The results showed the areas of subsidence to be bounded by stable ground with a low dielectric constant. Although ?ringing? in some of the anomaly locations distorted their appearance at depth, features originating at approximately 100 cm below surface could be clearly defined in spite of some attenuation by overlying clayey soil. A ?top of rock? model was created using Arc-GISTM after picking a reflection from each GPR profile where the karst depressions were best defined. Attenuation by the overlying clayey soil created a corrugated appearance to the Arc-GISTM model although the ringing effects were removed. A spline function provided the most realistic model for contouring values between centroids picked from the GPR profiles.
Keyword (in Japanese) (See Japanese page) 
(in English) GPR / Subsidence / Soil / Sinkhole / GIS / Karst / Hazard /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 309, SANE2013-65, pp. 67-71, Nov. 2013.
Paper # SANE2013-65 
Date of Issue 2013-11-15 (SANE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SANE  
Conference Date 2013-11-22 - 2013-11-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Hagi-hall(22), C for Northeast Asian Sudies(23), Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) The 12th workshop on subsurface electromagnetic measurement 
Paper Information
Registration To SANE 
Conference Code 2013-11-SANE 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Three-dimensional analysis of subsiding ground 
Sub Title (in English) A comparison of results using GPR-Slice and ArcGIS 
Keyword(1) GPR  
Keyword(2) Subsidence  
Keyword(3) Soil  
Keyword(4) Sinkhole  
Keyword(5) GIS  
Keyword(6) Karst  
Keyword(7) Hazard  
Keyword(8)  
1st Author's Name Donald M.Thieme  
1st Author's Affiliation Valdosta State University (VSU)
2nd Author's Name Benjamin Davis  
2nd Author's Affiliation Florida State University (FSU)
3rd Author's Name Can Denizman  
3rd Author's Affiliation Valdosta State University (VSU)
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Speaker Author-1 
Date Time 2013-11-22 16:45:00 
Presentation Time 25 minutes 
Registration for SANE 
Paper # SANE2013-65 
Volume (vol) vol.113 
Number (no) no.309 
Page pp.67-71 
#Pages 5 
Date of Issue 2013-11-15 (SANE) 

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