The natural background level (NBL) concept is revisited and combinedwith indicator krigingmethod to analyze the spatial distribution of groundwater qualitywithin a groundwater body (GWB). The aim is to provide a methodology to easily identify areaswith the same probability of exceeding a given threshold (whichmay be a groundwater quality criteria, standards, or recommended limits for selected properties and constituents). Three case studies with different hydrogeological settings and located in two countries (Portugal and Italy) are used to derive NBL using the preselection method and validate the proposed methodology illustrating its main advantages over conventional statistical water quality analysis. Indicator kriging analysis was used to create probability maps of the three potential groundwater contaminants. The results clearly indicate the areas within a groundwater body that are potentially contaminated because the concentrations exceed the drinking water standards or even the local NBL, and cannot be justified by geogenic origin. The combined methodology developed facilitates the management of groundwater quality because it allows for the spatial interpretation of NBL values.

Combining natural background levels (NBLs) assessment with indicator kriging analysis to improve groundwater quality data interpretation and management / Ducci, Daniela; Condesso de Melo, M. T.; Preziosi, E.; Sellerino, Mariangela; Parrone, D.; Ribeiro, L.. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - 569–570:(2016), pp. 569-584. [10.1016/j.scitotenv.2016.06.184]

Combining natural background levels (NBLs) assessment with indicator kriging analysis to improve groundwater quality data interpretation and management.

DUCCI, DANIELA
Primo
;
SELLERINO, MARIANGELA;
2016

Abstract

The natural background level (NBL) concept is revisited and combinedwith indicator krigingmethod to analyze the spatial distribution of groundwater qualitywithin a groundwater body (GWB). The aim is to provide a methodology to easily identify areaswith the same probability of exceeding a given threshold (whichmay be a groundwater quality criteria, standards, or recommended limits for selected properties and constituents). Three case studies with different hydrogeological settings and located in two countries (Portugal and Italy) are used to derive NBL using the preselection method and validate the proposed methodology illustrating its main advantages over conventional statistical water quality analysis. Indicator kriging analysis was used to create probability maps of the three potential groundwater contaminants. The results clearly indicate the areas within a groundwater body that are potentially contaminated because the concentrations exceed the drinking water standards or even the local NBL, and cannot be justified by geogenic origin. The combined methodology developed facilitates the management of groundwater quality because it allows for the spatial interpretation of NBL values.
2016
Combining natural background levels (NBLs) assessment with indicator kriging analysis to improve groundwater quality data interpretation and management / Ducci, Daniela; Condesso de Melo, M. T.; Preziosi, E.; Sellerino, Mariangela; Parrone, D.; Ribeiro, L.. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - 569–570:(2016), pp. 569-584. [10.1016/j.scitotenv.2016.06.184]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/634801
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