PMID- 23432397
OWN - NLM
STAT- MEDLINE
DCOM- 20140825
LR  - 20140107
IS  - 1745-6584 (Electronic)
IS  - 0017-467X (Linking)
VI  - 52
IP  - 1
DP  - 2014 Jan-Feb
TI  - Derivative-assisted classification of fractured zones crossing a deep borehole.
PG  - 145-55
LID - 10.1111/gwat.12035 [doi]
AB  - In this study, the derivative analysis using the derivative of drawdown with 
      respect to log-time was utilized to determine candidates for hydraulic conductor 
      domains (HCDs). At a 500-m deep borehole in the study site, the fractured rocks 
      crossing the borehole were first classified in fractured and nonfractured zones 
      by core logging and geophysical loggings, such as acoustic televiewing, density, 
      and flow loggings. After conducting the hydraulic tests such as constant head 
      withdrawal and recovery tests at the fractured zones and the nonfractured zones, 
      the derivative analyses were carried out, of which the results were evaluated to 
      determine the candidates for HCDs. For the nonfractured zones, the diagnostic 
      plot has only a big hump indicating poor connection of the background fractures 
      to the permeable geologic media, while those of the candidates for HCDs show 
      various flow regimes. On the basis of these results, the candidates for HCDs 
      among the fractured zones were determined. From discussion on the results, the 
      combination of the spacing analysis and derivative analysis following a hydraulic 
      test is recommended for determining the candidates for HCDs rather than other 
      geophysical loggings.
CI  - (c) 2013, National Ground Water Association.
FAU - Ji, Sung-Hoon
AU  - Ji SH
AD  - Radwaste Disposal Research Division, Korea Atomic Energy Research Institute, 
      Daejeon, Republic of Korea.
FAU - Lee, Dae Hyoung
AU  - Lee DH
FAU - Yeo, In Wook
AU  - Yeo IW
FAU - Park, Kyoung-Woo
AU  - Park KW
FAU - Koh, Yong-Kwon
AU  - Koh YK
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130221
PL  - United States
TA  - Ground Water
JT  - Ground water
JID - 9882886
SB  - IM
MH  - Geology/*methods
MH  - Hydrology/*methods
MH  - Models, Theoretical
MH  - Republic of Korea
EDAT- 2013/02/26 06:00
MHDA- 2014/08/26 06:00
CRDT- 2013/02/26 06:00
PHST- 2013/02/26 06:00 [entrez]
PHST- 2013/02/26 06:00 [pubmed]
PHST- 2014/08/26 06:00 [medline]
AID - 10.1111/gwat.12035 [doi]
PST - ppublish
SO  - Ground Water. 2014 Jan-Feb;52(1):145-55. doi: 10.1111/gwat.12035. Epub 2013 Feb 
      21.