NDLI: Hydrochemical dynamics of TOC and NO$_{3}$ $^{−}$ contents as natural tracers of infiltration in karst aquifers

Content Provider	Springer Nature Link
Author	Mudarra, Matías Andreo, Bartolomé Barberá, Juan Antonio Mudry, Jacques
Copyright Year	2013
Abstract	Analysis of Total Organic Carbon (TOC) and NO$_{3}$ $^{−}$ contents in the water at six springs in the province of Malaga (Southern Spain), sampled under different hydrologic conditions, revealed two different hydrochemical behaviour patterns for these natural tracers of infiltration. TOC content increased during every recharge period, following the rapid arrival of water infiltrating through the soil. On the other hand, NO$_{3}$ $^{−}$ content only rose during the first flood episodes (normally in autumn), and fell during the winter and spring ones. This difference is consequence of the distinctive biogeochemical kinetics of nitrogen with respect to organic carbon, both in the soil and within the aquifer. Unlike the mineralisation undergone by TOC from the surface to the spring, the NO$_{3}$ $^{−}$ ion remains in the aquifer almost unaffected, due to the oxidizing conditions prevailing within the karst medium, which do not allow its denitrification and favour its preservation within the saturated zone. In non-polluted aquifers, TOC and NO$_{3}$ $^{−}$ have a common origin in the soil and can be used to determine infiltration processes and the hydrogeological functioning of karst aquifers. Their different hydrochemical evolution provides information about mineralization and degradation processes of organic matter within karst aquifers, which can be used to validate the vulnerability to contamination in this type of medium.
Starting Page	507
Ending Page	523
Page Count	17
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	71
Issue Number	2
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-06-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbonate (karst) aquifer Hydrochemical dynamic Total Organic Carbon (TOC) NO$_{3}$ $^{−}$ contents Southern Spain Geology
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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TOC and NO3-, two natural tracers of infiltration with different hydrochemical behaviour in karst aquifers

TOC and NO3-, two natural tracers of infiltration with different hydrochemical behaviour in karst aquifers

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