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Forecasting and Mass Transport Modelling of Nitrates in the Esposende–Vila Do Conde Nitrate Vulnerable Zone (Portugal)

  • Joel Zeferino
  • Maria Rosário CarvalhoEmail author
  • Tânia Ferreira
  • Maria Catarina Silva
  • Maria José Afonso
  • Liliana Freitas
  • Ana Rita Lopes
  • Rosário Jesus
  • Sofia Batista
  • Helder I. Chaminé
  • José Martins Carvalho
Chapter
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

Esposende–Vila do Conde, a nitrate-vulnerable zone, in the littoral north of Portugal, is contaminated by nitrates of an agricultural origin. Measures have been implemented to reduce that contamination. The effectiveness of the measures was evaluated, predicting the time required for the groundwater body reach the quality standard, i.e., less than 50 mg/L for dissolved nitrates. Two methodologies were used, groundwater flow and nitrates transport modelling, and predictive analysis of time series. The transient simulation of nitrate transport shows that the minimization measures imposed in the NVZ are being effective. However, the persistence of concentrations above 50 mg/L in some areas is notorious even in the next 24 years. The forecasting points out to a recovery period of ten years if current agricultural practices are maintained. The prediction of NO3 concentration based on forecasting methodology may not be applicable in the long run because it is a punctual analysis, not taking into consideration the contaminant dispersion dependent on the aquifer characteristics.

Keywords

Groundwater Nitrates Numerical modelling FEFLOW Forecasting 

References

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    APA—Agência Portuguesa do Ambiente: Plano de Gestão da Região Hidrográfica do Cávado, Ave e Leça (RH2). Relatório Técnico. Parte 2 – Caraterização e Diagnóstico. Agência Portuguesa do Ambiente, Lisboa. (2016)Google Scholar
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    Pedrosa, M.Y., Brites, J.A., Pereira, A.P.: Nota explicativa da carta das fontes e do risco de contaminação da região de Entre-Douro-e-Minho. Folhas Norte e Sul, escala 1/100000. Instituto Geológico e Mineiro, Lisboa (2002)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Joel Zeferino
    • 1
  • Maria Rosário Carvalho
    • 1
    Email author
  • Tânia Ferreira
    • 1
  • Maria Catarina Silva
    • 1
  • Maria José Afonso
    • 2
    • 4
  • Liliana Freitas
    • 2
  • Ana Rita Lopes
    • 3
  • Rosário Jesus
    • 3
  • Sofia Batista
    • 3
  • Helder I. Chaminé
    • 2
    • 4
  • José Martins Carvalho
    • 2
    • 4
  1. 1.IDL and Department of Geology, Faculty of SciencesUniversity of LisbonLisbonPortugal
  2. 2.Laboratory of Cartography and Applied Geology (LABCARGA), DEG, School of Engineering (ISEP)Polytechnic of PortoPortoPortugal
  3. 3.APA—Portuguese Environment AgencyLisbonPortugal
  4. 4.Centre GeoBioTecUAAveiroPortugal

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