Using radon-222 to study coastal groundwater/surface-water interaction in the Crau coastal aquifer (southeastern France)

Mayer, Adriano; Nguyen, Bach Thao; Banton, Olivier

doi:10.1007/s10040-016-1424-9

Cited by 9 publications

(7 citation statements)

References 23 publications

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“…Most of the studies used stable isotopes to distinguish between different GW origins [94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110][111][112][113], while some of them used radioactive isotopes to determine the residence time of GW [114][115][116], that is, one of the very few pieces of information allowing researchers to distinguish between actual and paleo SWI. These last elements have also been used to study surface water/groundwater interaction; for example, in a recent paper from Mayer et al [117], short-lived radioactive isotopes, such as radon-222, allowed not only for the determination of the amount of exchange between different water bodies, but also for the ability to precisely derive GW flow velocities and saturated hydraulic conductivities, which are vital parameters to constrain numerical simulations.…”

Section: Analytical Techniquesmentioning

confidence: 99%

The Issue of Groundwater Salinization in Coastal Areas of the Mediterranean Region: A Review

Mastrocicco

Colombani

2021

Water

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The Mediterranean area is undergoing intensive demographic, social, cultural, economic, and environmental changes. This generates multiple environmental pressures such as increased demand for water resources, generation of pollution related to wastewater discharge, and land consumption. In the Mediterranean area, recent climate change studies forecast large impacts on the hydrologic cycle. Thus, in the next years, surface and ground-water resources will be gradually more stressed, especially in coastal areas. In this review paper, the historical and geographical distribution of peer-review studies and the main mechanisms that promote aquifer salinization in the Mediterranean area are critically discussed, providing the state of the art on topics such as actual saltwater wedge characterization, paleo-salinities in coastal areas, water-rock interactions, geophysical techniques aimed at delineating the areal and vertical extent of saltwater intrusion, management of groundwater overexploitation using numerical models and GIS mapping techniques for aquifer vulnerability to salinization. Each of the above-mentioned approaches has potential advantages and drawbacks; thus, the best tactic to tackle coastal aquifer management is to employ a combination of approaches. Finally, the number of studies focusing on predictions of climate change effects on coastal aquifers are growing but are still very limited and surely need further research.

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Section: Analytical Techniquesmentioning

confidence: 99%

The Issue of Groundwater Salinization in Coastal Areas of the Mediterranean Region: A Review

Mastrocicco

Colombani

2021

Water

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“…Each sampling campaign were preceded by slight to moderate rain events (45 mm on the 23 rd October 2012; 20 mm on the 05 th January 2014). Since seawater typically displays low activity, the sensitivity of the system was increased using two RAD7 monitors connected with the RAD-AQUA in closed loop (Mayer et al, 2016). The water was pumped with a 4.5 l/min flow rate for injection into the RADAQUA water exchanger.…”

Section: Rn 223 Ra and 224 Ra Activities Measurementsmentioning

confidence: 99%

“…The system allowed continuous measurements during navigation or fixed position. For more detailed information, sampling and analytical process are consistent with those outlined in (Mayer et al, 2016).…”

Section: Rn 223 Ra and 224 Ra Activities Measurementsmentioning

confidence: 99%

Detection and quantification of low submarine groundwater discharge flows by radionuclides to support conceptual hydrogeological model of porous aquifers

Santoni

Garel

Mayer

et al. 2020

Journal of Hydrology

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“…In coastal areas, phreatic water exerts a pressure on sea water to prevent salt intrusion and protects resource for drinking water, agricultural and industrial needs, including tourism (Mayer et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Combination of a crop model and a geochemical model as a new approach to evaluate the sustainability of an intensive agriculture system

Mohammed

Trolard

Gillon

et al. 2017

Science of The Total Environment

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By combining a crop model (STICS) and a geochemical model (PHREEQC), a new approach to assess the sustainability of agrosystems is proposed. It is based upon aqueous geochemistry and the stepwise modifications of soil solution during its transfer from the surface till aquifer. Meadows of Crau (SE France), irrigated since the 16th century, were field monitored (2012-2015) and modelled. Except for N, the mineral requirements of hay are largely covered by dissolved elements brought by irrigation water with only slight deficits in K and P, which are compensated by P-K fertilizers and the winter pasture by sheep. N cycle results in a very small nitrate leakage. The main determinants of the chemical composition changes of water are: concentration by evaporation, equilibration with soil pCO, mineral nutrition of plants, input of fertilizers, sheep grazing, mineral-solution interactions in superficial formations till the aquifer, including ion exchange. Inverse modelling with PHREEQC allows for quantifying these processes. For groundwater, measured composition fit statistically very well with those computed, validating thus this approach. This long-term established agrosystem protects both soil and water resources: soil nutritional status remains constant with even some P and (minor) K fixation in soils; long-term decarbonatation occurs but it is greatly slowed by saturation of irrigation water by carbonate; P fixation in soil protects groundwater from eutrophication.

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Using radon-222 to study coastal groundwater/surface-water interaction in the Crau coastal aquifer (southeastern France)

Cited by 9 publications

References 23 publications

The Issue of Groundwater Salinization in Coastal Areas of the Mediterranean Region: A Review

The Issue of Groundwater Salinization in Coastal Areas of the Mediterranean Region: A Review

Detection and quantification of low submarine groundwater discharge flows by radionuclides to support conceptual hydrogeological model of porous aquifers

Combination of a crop model and a geochemical model as a new approach to evaluate the sustainability of an intensive agriculture system

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