scholarly journals Assessment of chloride natural background levels by applying statistical approaches. Analyses of European coastal aquifers in different environments

2022 ◽  
Vol 174 ◽  
pp. 113303
Author(s):  
D. Pulido-Velazquez ◽  
L. Baena-Ruiz ◽  
J. Fernandes ◽  
G. Arnó ◽  
K. Hinsby ◽  
...  
Keyword(s):  
Coastal Aquifers ◽  
Natural Background ◽  
Background Levels ◽  
Statistical Approaches

Assessment of natural background levels in potentially contaminated coastal aquifers

2014 ◽  
Vol 476-477 ◽  
pp. 38-48 ◽  
Author(s):  
A. Molinari ◽  
F. Chidichimo ◽  
S. Straface ◽  
A. Guadagnini
Keyword(s):  
Coastal Aquifers ◽  
Natural Background ◽  
Background Levels

scholarly journals Measurement of the 36Cl deposition flux in central Japan: natural background levels and seasonal variability

2012 ◽  
Vol 106 ◽  
pp. 73-80 ◽  
Author(s):  
Yuki Tosaki ◽  
Norio Tase ◽  
Kimikazu Sasa ◽  
Tsutomu Takahashi ◽  
Yasuo Nagashima
Keyword(s):  
Seasonal Variability ◽  
Deposition Flux ◽  
Natural Background ◽  
Central Japan ◽  
Background Levels

Natural background levels and threshold values for groundwater in fluvial Pleistocene and Tertiary marine aquifers in Flanders, Belgium

2008 ◽  
Vol 57 (5) ◽  
pp. 1155-1168 ◽  
Author(s):  
Marleen Coetsiers ◽  
Petra Blaser ◽  
Kristine Martens ◽  
Kristine Walraevens
Keyword(s):  
Threshold Values ◽  
Natural Background ◽  
Background Levels

Comparing methods to estimate chloride natural background levels to assess sea water intrusion

2021 ◽  
Author(s):  
David Pulido-Velazquez ◽  
Leticia Baena-Ruiz ◽  
Denitza Voutchkova ◽  
Birgitte Hansen ◽  
Klaus Hinsby ◽  
...  
Keyword(s):  
Sea Water ◽  
Anthropogenic Impacts ◽  
Salt Water ◽  
Salt Water Intrusion ◽  
Natural Background ◽  
Horizon 2020 ◽  
Water Intrusion ◽  
Background Levels ◽  
Research And Innovation ◽  
Perform Sensitivity Analysis

<p>In order to assess the anthropogenic impacts on groundwater quality we generally need to identify the natural conditions or Natural background levels (NBLs) within groundwater systems, which are used as references to assess the evolution of the contamination status. This information, in addition to the threshold values (TVs), which are derived from NBLs and based on specific criteria values for legitimate water uses and the environment (terrestrial and aquatic ecosystems), is required to appropriately assess of the chemical status of groundwater in accordance with the European Water Framework Directive and to analyse and propose potential measures where they are required.</p><p>In literature, different methodologies are available to assess NBLs and reference TVs for different geochemical substances based on the available measurements of groundwater salinity (e.g. based on probability plots). In this work we analyze and compare three previously proposed methods for derivation of chloride NBLs, which is a conservation solute and is closely related to salt water intrusion in inland and coastal aquifers. We discuss and compare their applicability in pilots located in different settings (southern /northern European / Mediteranean/ North Sea /Baltic Sea) covering different typologies (detrital, karstic, fissured aquifers) and management issues (overexploitation, land use and land cover changes, etc). We perform sensitivity analysis to different constraints applied to remove samples affected by human activity (Nitrate and the brackish saline constraints) in the assessment of NBLs. Finally, based on this analysis, we propose a general approach for derivation of NBLs that could be applied to any of the tested pilots as well as other similar settings in Europe.</p><p> </p><p>This research has been partially supported by the SIGLO-AN project (RTI2018-101397-B-I00) from the Spanish Ministry of Science, Innovation and Universities (Programa Estatal de I+D+I orientada a los Retos de la Sociedad).</p><p>This work has been partially supported by the GeoE.171.008-TACTIC and GeoE.171.008-HOVER projects from GeoERA organization funded by European Union’s Horizon 2020 research and innovation program.</p>

A multi-method approach for the assessment of natural background levels in groundwater

2019 ◽  
Vol 659 ◽  
pp. 884-894 ◽  
Author(s):  
Daniele Parrone ◽  
Stefano Ghergo ◽  
Elisabetta Preziosi
Keyword(s):  
Natural Background ◽  
Background Levels ◽  
Multi Method Approach ◽  
Method Approach

Assessing natural background levels in shallow groundwater in a large semiarid drainage Basin

2020 ◽  
Vol 584 ◽  
pp. 124638 ◽  
Author(s):  
Yanyan Gao ◽  
Hui Qian ◽  
Chenchen Huo ◽  
Jie Chen ◽  
Haike Wang
Keyword(s):  
Drainage Basin ◽  
Shallow Groundwater ◽  
Natural Background ◽  
Background Levels

The VIOLA Project: Natural background levels for the groundwater bodies of Apulia Region (Southern Italy)

2020 ◽  
Author(s):  
Rita Masciale ◽  
Stefano Amalfitano ◽  
Eleonora Frollini ◽  
Stefano Ghergo ◽  
Marco Melita ◽  
...  
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Historical Data ◽  
Monitoring Network ◽  
Threshold Values ◽  
Natural Background ◽  
Resources Management ◽  
Apulia Region ◽  
Background Levels ◽  
Sampling Procedures

<p>The European Water Directives (WDs, 2000/60/EC; 2006/118/EC) force Member States to proceed to the characterization of groundwater bodies in order to define their quantitative and chemical status and their environmental objectives. Since the earlier years of this century, the Department of Water Resources Management of the Apulia Region implemented the WDs by setting a wide groundwater monitoring network, delineating regional groundwater bodies and characterizing their status. The groundwater bodies characterization showed that the risk of not achieving a good status was generally related to salt contamination and the exceedance of the threshold values or the quality standards for some parameters (e.g., NO<sub>3</sub>, Fe, Mn), as expected for regions with a predominantly agricultural vocation and characterized by extensive coastal development. The main regional aquifers reside in the carbonate bedrock characterized by intense fracturing and karstification.</p><p>The groundwater Directive 2006/118/EC allows the evaluation of Natural Background Levels (NBLs) to be taken into account when establishing the relevant threshold values.</p><p>During the last years, the IRSA-CNR collaborated with the National Environmental Protection Agency (ISPRA) in defining scientifically based guidelines for the NBLs assessment and clarifying some methodological aspects. These guidelines suggest excluding water samples characterised by high levels of specific markers clearly indicating anthropogenic inputs.</p><p>The project "VIOLA - Natural background levels for the groundwater bodies of Apulia Region ", has been funded by the Department of Water Resources Management of the Apulia Region for carrying out the application and validation of the above mentioned methodologies and to develop and test methodologies better tailored for coastal aquifers. In particular, isotopic techniques will be used to discriminate between the anthropogenic and natural origin of the salinization and historical data of groundwater salinization will be processed in order to study its evolution in time. . Finally, the investigation of innovative microbiological techniques is envisaged to evaluate how changes in groundwater quality will affect the resident microbial community properties involved in C-flux.</p><p>The VIOLA project will last three years during which the IRSA-CNR will:</p><ul><li>collect and order all the background knowledge relating to the hydro-geo-chemical characteristics of the Apulian groundwater bodies,</li> <li>define adequate groundwater sampling procedures and assessment protocols for the NBLs,</li> <li>carry out field activities, aimed at sampling groundwater at a specific monitoring network and measuring values of main physico-chemical and microbiological parameters, in the study area of the coastal Murgia groundwater body, and</li> <li>produce tools to support the planning and management of groundwater resources integrated in a GIS environment.</li> </ul><p>This contribution aims at providing an overview at the ongoing activities at the regional scale, illustrating the groundwater bodies setting, the main pressures and the preliminary derivation of NBL using the historical data.</p>

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