Deduction of groundwater flow regime in a basaltic aquifer using geochemical and isotopic data: The Golan Heights, Israel case study

Dafny, Elad; Burg, Avihu; Gvirtzman, Haim

doi:10.1016/j.jhydrol.2006.04.002

Cited by 58 publications

(39 citation statements)

References 18 publications

(42 reference statements)

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“…The major cations and anions make up the bulk of groundwater quality [40], and it is widely known that the major ions dissolved in groundwater could have originated from one of three sources: juvenile rainwater, water-soil and water-rock interactions and anthropogenic influences [41].…”

Section: Major Ions and Water Typementioning

confidence: 99%

Factors Influencing the Shallow Groundwater Quality in Four Districts with Different Characteristics in Urban Area (Douala, Cameroon)

Ketchemen-Tandia¹,

Boum-Nkot²,

Ebondji³

et al. 2017

GEP

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This study examines groundwater samples from four areas under different conditions. Variations amongst the areas are due to the distinct topography, demographics, and socio-economic activities. A qualification of the groundwater using the following parameters; pH, electric conductivity and nitrate analysis yielded results depicting the deplorable state of the unconfined aquifer; which is even worst in the densely populated and low-lying areas. These unfavorable conditions are present in the older districts (Bependa and Ndogbong) compared to the younger and least populated (urbanized) districts (Ndogpassi and Logpom). The poor quality of groundwater could be due to contamination by sewage from latrines and surface discharges. Nevertheless, nitrate contents (>241 mg/l) in these districts indicate that pollution has not reached the alarming levels observed in other West African cities (nitrates > 400 mg/l). Relatively low concentrations of nitrate in groundwater of the studied areas could be due to volatilization phenomena common in the unconfined aquifers in Douala. We however remarked that most of the studied wells are not used as drinking water, because they present particular health risks to humans.

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Section: Major Ions and Water Typementioning

confidence: 99%

Factors Influencing the Shallow Groundwater Quality in Four Districts with Different Characteristics in Urban Area (Douala, Cameroon)

Ketchemen-Tandia¹,

Boum-Nkot²,

Ebondji³

et al. 2017

GEP

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“…Areas underlain by extensive basalt formations, therefore, can be used for drinking-water supply. Examples of such basalt formations are the Deccan Trap Aquifer in Peninsular India (Das and Ars 1971;Kulkarni et al 2000), the Columbia River Basalt Group in USA (Miller 1999), and the Golan Heights (Dafny et al 2006) and Azraq Basin in the Middle East (El-Naqa et al 2007). When such aquifers suffer depleting groundwater levels, it means that pumping rates exceed recharge rates.…”

Section: Introductionmentioning

confidence: 99%

Groundwater recharge in Pleistocene sediments overlying basalt aquifers in the Palouse Basin, USA: modeling of distributed recharge potential and identification of water pathways

2011

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Groundwater levels in basalt aquifers around the world have been declining for many years. Understanding water pathways is needed for solutions like artificial drainage. Water supply in the Palouse Basin, Washington and Idaho, USA, primarily relies on basalt aquifers. This study presents a combination of modeling and field observations to understand the spatial distribution of recharge pathways in the overlying Pleistocene sediments. A spatially distributed model was used to quantify potential recharge rates. The model shows clearly that recharge predominantly occurs through non-argilic soils and soils that are not underlain by fine-grained sediments, i.e. the upper area of the watershed. A field survey was conducted to determine recharge pathways from this area. It revealed 83 perennial springs. Drillings near springs showed connection of coarse-grained layers within the fine-grained Sediments of Bovill to these springs. Such layers, with streambed-like features, act as paleo-channels. Water from one of these coarse-grained layers had a similar electrical conductivity (200 μS cm -1 ) to water from a downstream perennial spring, also suggesting the existence of a lateral conduit for deep percolation water.

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“…However Legout et al [80] have shown that in order to obtain a complete view of the chemical vulnerability of dual porosity aquifers, one should also take into account transient state processes. In particular, the degree of saturation of lava flows that can constitute temporary or permanent perched aquifers [5,9,13,54] is a key consideration. A pollutant may be present alternatively in partially or totally saturated conditions along the flowpath.…”

Section: Supply Of Argnat Basin Springs and Implication For The Long-mentioning

confidence: 99%

“…Exploitation of volcanic groundwater is vital in many locations around the world [1][2][3][4][5][6][7][8][9][10][11][12] therefore management and international policy (e.g., [13]) implementation of resource and related ecosystem protection [14][15][16][17] require the assessment of volcanic aquifer vulnerability to pollution in the context of local and global anthropogenic pressures.…”

Section: Introductionmentioning

confidence: 99%

“…Laboratory experiments showed that hydraulic conductivity K may vary in a range com-prised between 10 −1 and 10 −15 m/s with some basalts presenting 10 ranges of magnitudes in the same formation [21] with strong variability on the vertical axis due to interflow spaces and horizontal fractures [22]. Consequently, groundwater pathways, storage and discharge may be very variable, as was pointed out in numerous systems such as the Golan heights in Israel [5], India [3], Reunion Island [2,23,24], Mayotte Island in the Comoros archipelago [1,12], Madeira Island [25] Galapagos Islands [8]. These systems may behave as fine grained systems with poorly variable discharge [9,26,27] associated with slow groundwater transit.…”

Section: Introductionmentioning

confidence: 99%

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Contaminant transfer and hydrodispersiveparameters in basaltic lava flows: artificial tracertest and implications for long-term management

et al. 2015

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Abstract:The aim of this paper is to evaluate the vulnerability after point source contamination and characterize water circulations in volcanic flows located in the Argnat basin volcanic system (Chaîne des Puys, French Massif Central) using a tracer test performed by injecting a iodide solution. The analysis of breakthrough curves allowed the hydrodispersive characteristics of the massive lava flows to be determined. Large Peclet numbers indicated a dominant advective transport. The multimodal feature of breakthrough curves combined with high values of mean velocity and low longitudinal dispersion coefficients indicated that water flows in an environment analogous to a fissure system, and only slightly interacts with a low porosity matrix (ne < 1%). Combining this information with lava flow stratigraphy provided by several drillings allowed a conceptual scheme of potential contaminant behaviour to be designed. Although lava flows are vulnerable to point source pollution due to the rapid transfer of water within fractures, the saturated scoriaceous layers located between massive rocks should suffice to strongly buffer the transit of pollution through dilution and longer transit times. This was consistent with the low recovery rate of the presented tracer test.

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Deduction of groundwater flow regime in a basaltic aquifer using geochemical and isotopic data: The Golan Heights, Israel case study

Cited by 58 publications

References 18 publications

Factors Influencing the Shallow Groundwater Quality in Four Districts with Different Characteristics in Urban Area (Douala, Cameroon)

Factors Influencing the Shallow Groundwater Quality in Four Districts with Different Characteristics in Urban Area (Douala, Cameroon)

Groundwater recharge in Pleistocene sediments overlying basalt aquifers in the Palouse Basin, USA: modeling of distributed recharge potential and identification of water pathways

Contaminant transfer and hydrodispersiveparameters in basaltic lava flows: artificial tracertest and implications for long-term management

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