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Water 2018, 10(1), 79; https://doi.org/10.3390/w10010079

Quantification of Groundwater Recharge from an Ephemeral Stream into a Mountainous Karst Aquifer

1
Zuckerberg Institute for Water Research, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Sede Boqer 8499000, Israel
2
Etgar A. Engineering Ltd., Tel Hai 26b’, Ra’anana 4310401, Israel
3
Soil Erosion Research Station, Ministry of Agriculture and Rural Development, Rishon LeZion 7505101, Israel
4
Israel Hydrological Service, Israel Water Authority, Jerusalem 9136002, Israel
*
Author to whom correspondence should be addressed.
Received: 29 November 2017 / Revised: 24 December 2017 / Accepted: 24 December 2017 / Published: 17 January 2018
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Abstract

Sustainable groundwater production from karst aquifers is primarily dictated by its recharge rate. Therefore, it is essential to accurately quantify annual groundwater recharge in order to limit overexploitation and to evaluate artificial methods for groundwater enrichment. Infiltration during erratic flood events in karst basins may substantially contribute to aquifer recharge. However, the complicated nature of karst systems, which are characterized in part by multiple springs, sinkholes, and losing/gaining streams, impede accurate quantification of the actual contribution of flood waters to groundwater recharge. In this study, we aim to quantify the proportion of groundwater recharge accrued during runoff events in a karst aquifer. The role of karst conduits on flash flood infiltration was examined during four flood and controlled runoff events in the Soreq creek near Jerusalem, Israel. We distinguished between direct infiltration, percolation through karst conduits, and diffuse infiltration—the latter of which is most affected by evapotranspiration. A water balance was calculated for the 2014/15 hydrological year using the Hydrologic Engineering Center-Hydrologic Modelling System (HEC-HMS). Simulations show that 6.8 to 19.2% of the annual recharge volume was added to the aquifer from infiltration of runoff losses along the creek through the karst system. View Full-Text
Keywords: karst aquifer recharge; hydrometeorological model; ephemeral stream; flash flood infiltration; groundwater enrichment; artificial recharge karst aquifer recharge; hydrometeorological model; ephemeral stream; flash flood infiltration; groundwater enrichment; artificial recharge
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Dvory, N.Z.; Ronen, A.; Livshitz, Y.; Adar, E.; Kuznetsov, M.; Yakirevich, A. Quantification of Groundwater Recharge from an Ephemeral Stream into a Mountainous Karst Aquifer. Water 2018, 10, 79.

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