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Paper Abstract and Keywords
Presentation 2007-10-25 14:40
[Poster Presentation] Crosshole GPR monitoring of infiltration process in a vadose zone
Hannuree Jang (Pukyong Nat. Univ.), Seiichiro Kuroda (NIRE), Hee Joon Kim (Pukyong Nat. Univ.) SANE2007-68
Abstract (in Japanese) (See Japanese page) 
(in English) An artificial groundwater recharge test was conducted in Nagaoka City in Japan, and time-lapse crosshole GPR data were collected to monitor the infiltration process in a vadose zone. Since electromagnetic wave velocities in a vadose zone are largely controlled by variations in water content, an increase in traveltimes is interpreted as an increase in saturation. In the test zone, the infiltrated water penetrated downward with an average velocity of about 2.7 m/h. A finite-difference time-domain method is applied using two-dimensional cylindrical coordinates to simulate radargrams associated with the advance of a wetting front during the filtration process. To accurately determine the water content profile, correct velocity analysis requires identification of first-arriving critically refracted waves from the traveltime profile. The standard zero-offset profiling for which all first arrivals are assumed to be direct waves, results in an underestimation of water content in a transition zone.
Keyword (in Japanese) (See Japanese page) 
(in English) time-lapse / crosshole / GPR / vadose zone / FDTD / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 277, SANE2007-68, pp. 37-42, Oct. 2007.
Paper # SANE2007-68 
Date of Issue 2007-10-18 (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 2007-10-25 - 2007-10-26 
Place (in Japanese) (See Japanese page) 
Place (in English) KIST(Seoul) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) The 9th workshop on subsurface electromagnetic measurement 
Paper Information
Registration To SANE 
Conference Code 2007-10-SANE 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Crosshole GPR monitoring of infiltration process in a vadose zone 
Sub Title (in English)  
Keyword(1) time-lapse  
Keyword(2) crosshole  
Keyword(3) GPR  
Keyword(4) vadose zone  
Keyword(5) FDTD  
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1st Author's Name Hannuree Jang  
1st Author's Affiliation Pukyong National University (Pukyong Nat. Univ.)
2nd Author's Name Seiichiro Kuroda  
2nd Author's Affiliation National Institute for Rural Engineering (NIRE)
3rd Author's Name Hee Joon Kim  
3rd Author's Affiliation Pukyong National University (Pukyong Nat. Univ.)
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Speaker Author-1 
Date Time 2007-10-25 14:40:00 
Presentation Time 30 minutes 
Registration for SANE 
Paper # SANE2007-68 
Volume (vol) vol.107 
Number (no) no.277 
Page pp.37-42 
#Pages 6 
Date of Issue 2007-10-18 (SANE) 

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