Derivation of natural background levels and threshold values for groundwater bodies in the Upper Rhine Valley (France, Switzerland and Germany)

Wendland, Frank; Berthold, Georg; Blum, Ariane; Elsass, Philippe; Fritsche, Johann-Gerhard; Kunkel, Ralf; Wolter, R.

doi:10.1016/j.desal.2007.01.240

Cited by 56 publications

(22 citation statements)

References 8 publications

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“…Utilising the density dependent groundwater flow model the location of the respective water supply wells in the waterworks can be optimised to prevent exceeding salinisation beyond the permitted limits. For the case of EU member states this includes not only the EU drinking water standards, but also properly derived groundwater threshold values according to the EU Water Framework and Groundwater directives (Hinsby et al, 2008;Wendland et al, 2008). Figure 21 (left panel) shows the supply wells of WW I (top) and WW II (below) (red circles) together with the TDS distribution computed for 2100 at depths of the waterworks screens.…”

Section: Possible Solutions For the Futurementioning

confidence: 99%

“…According to the seasonal pattern of the tourism, the annual variation of the abstraction is considerable (Fig. 2, bottom panel) and varies usually during one year between 30 000 and 125 000 m 3 month −1 for all supply wells (Winter, 2008a(Winter, , 2009 (Fig. 2, bottom panel).…”

Section: Geological Background and Groundwater Situationmentioning

confidence: 99%

“…Recent studies (Winter, 2008a(Winter, , 2009) indicate a limited fresh groundwater resource and a level of water abstraction that is just in balance with the amount of recharge. Climate changes are expected to adversely affect this balance in future and decrease the potential freshwater supply by salinisation although increasing precipitation on the island will partly counteract this development.…”

Section: Geological Background and Groundwater Situationmentioning

confidence: 99%

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Numerical modelling of climate change impacts on freshwater lenses on the North Sea Island of Borkum using hydrological and geophysical methods

Sulzbacher

Wiederhold

Siemon

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract.A numerical, density dependent groundwater model is set up for the North Sea Island of Borkum to estimate climate change impacts on coastal aquifers and especially the situation of barrier islands in the Wadden Sea. The database includes information from boreholes, a seismic survey, a helicopter-borne electromagnetic (HEM) survey, monitoring of the freshwater-saltwater boundary by vertical electrode chains in two boreholes, measurements of groundwater table, pumping and slug tests, as well as water samples. Based on a statistical analysis of borehole columns, seismic sections and HEM, a hydrogeological model is set up. The groundwater model is developed using the finite-element programme FEFLOW. The density dependent groundwater model is calibrated on the basis of hydraulic, hydrological and geophysical data, in particular spatial HEM and local monitoring data. Verification runs with the calibrated model show good agreement between measured and computed hydraulic heads. A good agreement is also obtained between measured and computed density or total dissolved solids data for both the entire freshwater lens on a large scale and in the area of the well fields on a small scale.For simulating future changes in this coastal groundwater system until the end of the current century, we use the climate scenario A2, specified by the Intergovernmental Panel on Climate Change and, in particular, the data for the German North Sea coast. Simulation runs show proceeding salinisation with time beneath the well fields of the two waterworks Waterdelle and Ostland.The modelling study shows that the spreading of well fields is an appropriate protection measure against excessive salinisation of the water supply until the end of the current century.

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Section: Possible Solutions For the Futurementioning

confidence: 99%

Section: Geological Background and Groundwater Situationmentioning

confidence: 99%

Section: Geological Background and Groundwater Situationmentioning

confidence: 99%

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Numerical modelling of climate change impacts on freshwater lenses on the North Sea Island of Borkum using hydrological and geophysical methods

Sulzbacher

Wiederhold

Siemon

et al. 2012

Hydrol. Earth Syst. Sci.

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“…This is the case of the work carried out within the Background cRiteria for the IDentification of Groundwater thrEsholds (BRIDGE) project (Wendland et al, 2008). The overall aim of BRIDGE was to develop and test a method for the derivation of pollutant threshold values for groundwater bodies in support of the Status provisions of the WFD and the Groundwater Daughter Directive (GWDD).…”

Section: Introductionmentioning

confidence: 99%

A chemical status predictor. A methodology based on World-Wide sediment samples

Gredilla

Vallejuelo

Diego

et al. 2015

Journal of Environmental Management

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“…The NBL of an element or compound in groundwater represents the range of concentrations resulting from the interaction of different natural atmospheric, geological, chemical and biological process during the hydrological cycle, and it could be influenced by human activities (Edmunds and Shand, 2008;Hinsby et al, 2008;Reimann and Garrett, 2005). By defining the NBL, it is necessary to know the extension and the hydro-geochemical characteristics of the examined groundwater body, paying attention to collect pristine water samples of the same aquifer body far from anthropogenic sources of contamination (Coetsiers et al, 2009;Hinsby et al, 2008;Wendland et al, 2008aWendland et al, , 2008b. Many studies treat the problem of the NBL definition testing different approaches for its estimation (Coetsiers et al, 2009;Ducci et al, 2016;Molinari et al, 2012;Preziosi et al, 2010;Fumagalli, 2013, Rotiroti et al, 2015), since the NBL assumes importance discriminating the anthropogenic contamination from the natural occurrence.…”

Section: Introductionmentioning

confidence: 99%

Geostatistics as a tool to improve the natural background level definition: An application in groundwater

Libera

Fabbri

Mason³

et al. 2017

Science of The Total Environment

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The Natural Background Level (NBL), suggested by UE BRIDGE project, is suited for spatially distributed datasets providing a regional value that could be higher than the Threshold Value (TV) set by every country. In hydro-geochemically dis-homogeneous areas, the use of a unique regional NBL, higher than TV, could arise problems to distinguish between natural occurrences and anthropogenic contaminant sources. Hence, the goal of this study is to improve the NBL definition employing a geostatistical approach, which reconstructs the contaminant spatial structure accounting geochemical and hydrogeological relationships. This integrated mapping is fundamental to evaluate the contaminant's distribution impact on the NBL, giving indications to improve it. We decided to test this method on the Drainage Basin of Venice Lagoon (DBVL, NE Italy), where the existing NBL is seven times higher than the TV. This area is notoriously affected by naturally occurring arsenic contamination. An available geochemical dataset collected by 50 piezometers was used to reconstruct the spatial distribution of arsenic in the densely populated area of the DBVL. A cokriging approach was applied exploiting the geochemical relationships among As, Fe and NH4+. The obtained spatial predictions of arsenic concentrations were divided into three different zones: i) areas with an As concentration lower than the TV, ii) areas with an As concentration between the TV and the median of the values higher than the TV, and iii) areas with an As concentration higher than the median. Following the BRIDGE suggestions, where enough samples were available, the 90th percentile for each zone was calculated to obtain a local NBL (LNBL). Differently from the original NBL, this local value gives more detailed water quality information accounting the hydrogeological and geochemical setting, and contaminant spatial variation. Hence, the LNBL could give more indications about the distinction between natural occurrence and anthropogenic contamination.

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Derivation of natural background levels and threshold values for groundwater bodies in the Upper Rhine Valley (France, Switzerland and Germany)

Cited by 56 publications

References 8 publications

Numerical modelling of climate change impacts on freshwater lenses on the North Sea Island of Borkum using hydrological and geophysical methods

Numerical modelling of climate change impacts on freshwater lenses on the North Sea Island of Borkum using hydrological and geophysical methods

A chemical status predictor. A methodology based on World-Wide sediment samples

Geostatistics as a tool to improve the natural background level definition: An application in groundwater

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