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An Application of Correlation and Spectral Analysis in Hydrological Study of Neighboring Karst Springs
Article

Magnesium as Environmental Tracer for Karst Spring Baseflow/Overflow Assessment—A Case Study of the Pertuso Karst Spring (Latium Region, Italy)

Department of Civil, Building and Environmental Engineering (DICEA), Sapienza University of Rome, 00184 Rome, Italy
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Water 2021, 13(1), 93; https://doi.org/10.3390/w13010093
Received: 27 November 2020 / Revised: 28 December 2020 / Accepted: 30 December 2020 / Published: 4 January 2021
(This article belongs to the Special Issue Recent Advances in Karstic Hydrogeology)
Following a previous research carried out on the same site, this paper presents the update of the Mg2+ based method for the estimation of Pertuso Spring discharge, located in Central Italy. New collected data confirmed the validity of the proposed model and the conservative behaviour of Mg2+ for groundwater related to the Pertuso Spring aquifer. Further analysis allowed to obtain a local linear relationship between magnesium concentration and total spring discharge (including exploitation rate), regardless of the mixing model proposed with the Aniene River. As regards two samples which fall out of the linear relationship and could have been detected as “outliers”, more in-depth data processing and sensitivity analyses revealed that the lowering in magnesium, at equal discharges, is determined by the appearance of the quick-flow component, less mineralized and related to storm events. Results showed that under specific conditions, related to the absence or presence of previous intense rainfall events, Mg2+ could be effectively a useful tracer for separating spring conduit flow (overflow) from diffuse flow (baseflow) within the karst aquifer. View Full-Text
Keywords: karst spring; aquifer; magnesium; environmental tracer; discharge; baseflow; overflow; mass balance model karst spring; aquifer; magnesium; environmental tracer; discharge; baseflow; overflow; mass balance model
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MDPI and ACS Style

De Filippi, F.M.; Iacurto, S.; Grelle, G.; Sappa, G. Magnesium as Environmental Tracer for Karst Spring Baseflow/Overflow Assessment—A Case Study of the Pertuso Karst Spring (Latium Region, Italy). Water 2021, 13, 93. https://doi.org/10.3390/w13010093

AMA Style

De Filippi FM, Iacurto S, Grelle G, Sappa G. Magnesium as Environmental Tracer for Karst Spring Baseflow/Overflow Assessment—A Case Study of the Pertuso Karst Spring (Latium Region, Italy). Water. 2021; 13(1):93. https://doi.org/10.3390/w13010093

Chicago/Turabian Style

De Filippi, Francesco M., Silvia Iacurto, Gerardo Grelle, and Giuseppe Sappa. 2021. "Magnesium as Environmental Tracer for Karst Spring Baseflow/Overflow Assessment—A Case Study of the Pertuso Karst Spring (Latium Region, Italy)" Water 13, no. 1: 93. https://doi.org/10.3390/w13010093

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