Response of a coastal hydrogeological system to a rapid decline in sea level; the case of Zuqim springs – The largest discharge area along the Dead Sea coast

Burg, Avihu; Yechieli, Yoseph; Galili, Udi

doi:10.1016/j.jhydrol.2016.02.039

Cited by 15 publications

(8 citation statements)

References 47 publications

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“…6). It primarily provides a further example of the high temporal discharge variability over small spatial scales which, normally, is due to tides or wave set-up that change hydrostatic pressure conditions (Taniguchi et al, 2003b;Burnett et al, 2006). For the present case, tidal influences are irrelevant as the tidal cycles do not exist at the study site.…”

Section: Periodicity Of Diffuse Sgdmentioning

confidence: 93%

“…The dissolution process accelerates with the continuous and fast drop of the Dead Sea water level of ∼ 1 m yr −1 , which forces the formation of new groundwater flow paths. The resulting partially karstic flow system in the DSG is highly transient, resulting in immensely variable discharge rates, discharge locations and chemical composition of springs along the lakeshore (Burg et al, 2016). Besides admixing of interstitial brines to the groundwater, the degree of water-rock interaction in the DSG controls the groundwater's composition.…”

Section: Hydrogeological Settingmentioning

confidence: 99%

“…possess the ability to discriminate between the SGD shares and allow a linkage to the underlying processes, since the investigated temporal scale is continuous and ranges between daily and seasonal cycles (Taniguchi et al, 2003a;Michael et al, 2011). Yet, all of this cannot account for the spatial variability, as the entity and interaction of terrestrial and marine controls lead to a highly variable SGD appearance in terms of discharge type (diffuse vs. focused), temporal discharge behaviour, flow rates, spatial abundance (even over small spatial scales), and mixing (Michael et al, 2003;Taniguchi et al, 2003b;Burnett et al, 2006). U.…”

Section: Introductionmentioning

confidence: 99%

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Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements

Mallast

Siebert

2019

Hydrol. Earth Syst. Sci.

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Section: Periodicity Of Diffuse Sgdmentioning

confidence: 93%

Section: Hydrogeological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements

Mallast

Siebert

2019

Hydrol. Earth Syst. Sci.

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“…The eastward flow occurs in the Eastern Mountain Aquifer of Judea and Samaria (EMA). Past studies 27–32 have shown that the EMA is karstic, and groundwater is stored in the dolomite and limestone rocks of the Judea Group (Albian-Turonian age). The groundwater flows from the EMA into the rift filling units in the Jordan Valley and discharges mainly through the Zuqim, Qane and Samar springs near the Dead Sea (Fig.…”

Section: Regional Hydrogeologymentioning

confidence: 99%

Harnessing Paleohydrologic Modeling to Solve a Prehistoric Mystery

Levy

Goring-Morris

Yechieli

et al. 2019

Sci Rep

Self Cite

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A riddle arises at the Epipaleolithic and Neolithic sites that dot the lower Jordan Valley. The area has no water resources yet it has long been a focus of inquiry into the transition from mobile hunter-gatherer to sedentary agriculture-based cultures. How then is there such clear evidence of life here, and particularly at such a critical moment in human evolution? Keen to unravel this conundrum, a numerical hydrological model was devised to simulate the groundwater flow field within the Eastern Aquifer of the Judea and Samaria Mountains during the transition from the last glacial to the current interglacial. The model exhibits a range of groundwater flow regimes that prevailed in the past, demonstrating that there was once much larger groundwater discharge at these sites.

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“…However, due to the continuous drop of the Dead Sea water level of ~1.3m per year, the entire flow system is highly dynamic resulting in different degrees of maturity of its karstic parts. As a result, discharge rates, locations and composition of springs along the lake shore vary intensely (Burg et al, 2016). It is hence proposed, observable highly variable chemical compositions of discharging groundwater even within meters range are an expression of the maturity of the karst system.…”

Section: Hydrogeological Settingmentioning

confidence: 99%

Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements

Mallast¹,

Siebert²

2018

Preprint

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Abstract. Submarine groundwater discharge (SGD) is highly variable in spatial and temporal terms due to interplay of several terrestrial and marine processes. While discrete in-situ measurements provide a continuous temporal scale to investigate underlying processes and thus accounts for temporal heterogeneity, remotely sensed thermal infrared radiation sheds light on the spatial heterogeneity as it provides a continuous spatial scale. Here we report results of the combination of both, the continuous spatial and temporal scales, using the ability of an Unmanned Aerial Vehicle to hover above a predefined location and the continuous recording of thermal radiation of a coastal area at the Dead Sea (Israel). With a flight altitude of 65 m above the water surface resulting in a spatial resolution of 13 cm and a thermal camera (FLIRTau2) which measures the upwelling long-wave infrared radiation at 4 Hz resolution we are able to generate a time sequence of thermal radiation images which allows us to analyse spatiotemporal SGD dynamics. In turn, we are able to enhance focused SGD spots otherwise being camouflaged by strong lateral flow dynamics that may not be observed on single thermal radiation images. Plus, we show the spatiotemporal behavior of a SGD induced thermal radiation pattern to vary in size and over time by up to 55 % for focused SGDs and by up to 600 % for diffuse SGDs due to different underlying flow dynamics. These flow dynamics even display a short-term periodicity in the order of 20 to 78 s for diffuse SGD which we attribute to an interplay of conduit maturity/geometry and wave setup.

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Response of a coastal hydrogeological system to a rapid decline in sea level; the case of Zuqim springs – The largest discharge area along the Dead Sea coast

Cited by 15 publications

References 47 publications

Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements

Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements

Harnessing Paleohydrologic Modeling to Solve a Prehistoric Mystery

Combining continuous spatial and temporal scales for SGD investigations using UAV-based thermal infrared measurements

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