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פותח על ידי קלירמאש פתרונות בע"מ -
Examination of groundwater recharge with a calibrated/validated flow model of the deep vadose zone
Year:
2015
Source of publication :
Journal of Hydrology
Authors :
קורצמן, דניאל
;
.
Volume :
522
Co-Authors:
Turkeltaub, T., Dept. of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Israel, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, PO Box 6, Bet Dagan, Israel
Kurtzman, D., Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, PO Box 6, Bet Dagan, Israel
Bel, G., Dept. of Environmental Physics, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Israel
Dahan, O., Dept. of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Israel
Facilitators :
From page:
618
To page:
627
(
Total pages:
10
)
Abstract:
Recharge estimations are required for efficient groundwater systems management. Better estimations could be obtained by improving our understanding of the relationship between climate factors and recharge. This study explores the calibration of a Richards' equation-based model to transient deep vadose zone data, thereby allowing simulation of groundwater recharge over long periods and an investigation of the temporal correlations between recharge and precipitation. An array of four vadose zone-monitoring systems implemented in four different slanted boreholes drilled in different orientations into a deep vadose zone sandy formation (20m×20m×20m) enabled continuous monitoring of water content at selected depths and locations across the entire vadose zone under a Mediterranean climate. This unique high-resolution set of transient deep vadose zone data was used for inverse simulations. The flow model was then validated with a set of data under different atmospheric boundary conditions. The long-term mean annual recharge under a natural sand dune was calculated as 327mm year-1, 72% of the average annual precipitation (1996/7-2012/3), reflecting low evapotranspiration and runoff. The temporal cross-correlation analysis showed high correlations between the accumulated precipitation (over 6-9months) and the monthly recharge after 3 to 4months. Therefore, we conclude that the recharge fluxes are mainly influenced by the relatively recent (5-12-months) precipitation patterns. Including this time lag between precipitation and recharge, a predictive regression model was developed in which the May-to-April recharge is explained by annual precipitation in the previous year. © 2015 Elsevier B.V.
Note:
Related Files :
groundwater
Ground water recharge
monitoring
vadose zone
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.jhydrol.2015.01.026
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
32425
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:09
Scientific Publication
Examination of groundwater recharge with a calibrated/validated flow model of the deep vadose zone
522
Turkeltaub, T., Dept. of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Israel, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, PO Box 6, Bet Dagan, Israel
Kurtzman, D., Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, PO Box 6, Bet Dagan, Israel
Bel, G., Dept. of Environmental Physics, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Israel
Dahan, O., Dept. of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sede Boqer Campus, Israel
Examination of groundwater recharge with a calibrated/validated flow model of the deep vadose zone
Recharge estimations are required for efficient groundwater systems management. Better estimations could be obtained by improving our understanding of the relationship between climate factors and recharge. This study explores the calibration of a Richards' equation-based model to transient deep vadose zone data, thereby allowing simulation of groundwater recharge over long periods and an investigation of the temporal correlations between recharge and precipitation. An array of four vadose zone-monitoring systems implemented in four different slanted boreholes drilled in different orientations into a deep vadose zone sandy formation (20m×20m×20m) enabled continuous monitoring of water content at selected depths and locations across the entire vadose zone under a Mediterranean climate. This unique high-resolution set of transient deep vadose zone data was used for inverse simulations. The flow model was then validated with a set of data under different atmospheric boundary conditions. The long-term mean annual recharge under a natural sand dune was calculated as 327mm year-1, 72% of the average annual precipitation (1996/7-2012/3), reflecting low evapotranspiration and runoff. The temporal cross-correlation analysis showed high correlations between the accumulated precipitation (over 6-9months) and the monthly recharge after 3 to 4months. Therefore, we conclude that the recharge fluxes are mainly influenced by the relatively recent (5-12-months) precipitation patterns. Including this time lag between precipitation and recharge, a predictive regression model was developed in which the May-to-April recharge is explained by annual precipitation in the previous year. © 2015 Elsevier B.V.
Scientific Publication
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