Identifying watershed-scale groundwater flow barriers: the Yoqne'am Fault in Israel

Article


Dafny, Elad, Gvirtzman, Haim and Burg, Avihu. 2013. "Identifying watershed-scale groundwater flow barriers: the Yoqne'am Fault in Israel ." Hydrogeology Journal. 21 (5), pp. 1035-1051. https://doi.org/10.1007/s10040-013-0982-3
Article Title

Identifying watershed-scale groundwater flow barriers: the Yoqne'am Fault in Israel

ERA Journal ID1947
Article CategoryArticle
AuthorsDafny, Elad (Author), Gvirtzman, Haim (Author) and Burg, Avihu (Author)
Journal TitleHydrogeology Journal
Journal Citation21 (5), pp. 1035-1051
Number of Pages17
Year2013
Place of PublicationHeidelberg, Germany
ISSN0941-2816
1431-2174
1435-0157
Digital Object Identifier (DOI)https://doi.org/10.1007/s10040-013-0982-3
Web Address (URL)http://link.springer.com/content/pdf/10.1007%2Fs10040-013-0982-3.pdf
Abstract

Geological faults may serve either as groundwater conduits or barriers, depending on their hydraulic properties. Determining fault characteristics is therefore important when deciding inputs for numerical models developed for watershed-scale groundwater studies. Cutting-edge methods for determining fault characteristics have been widely applied for oil and gas reservoir characterization purposes, whereas water-resource studies simply use a priori values. This study evaluates the hydraulic properties of the Yoqne'am Fault (YF), in northern Israel, which impacts groundwater flow within the Judea Group Aquifer (JGA). The YF has a vertical throw of several hundred to one thousand meters accompanied by pronounced lateral throw. Detailed examination of hydrological and geochemical data from nearby wells, structural maps and numerical modeling results, suggests that the YF acts as a semi-impermeable feature with a hydraulic conductivity of less than 4x10e-2 m/d. The YF hydraulic conductivity is four orders of magnitude below that of the surrounding Judea Group rocks, and only a limited volume of water can leak through the fault. For that reason, it is concluded that the YF acts as a boundary between two large groundwater basins.

KeywordsIsrael; fault; hydraulic properties; Judea Group Aquifer; numerical modeling
ANZSRC Field of Research 2020370903. Natural hazards
370799. Hydrology not elsewhere classified
401208. Geophysical and environmental fluid flows
Public Notes

© 2013 Springer-Verlag Berlin Heidelberg. Published online 19 Apr 2013. Published version deposited in accordance with the copyright policy of the publisher.

Byline AffiliationsNational Centre for Engineering in Agriculture
Hebrew University of Jerusalem, Israel
Geological Survey of Israel, Israel
Institution of OriginUniversity of Southern Queensland
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