Assessment of SGD in karstic coastal massif : Aiguadolç beach (Garraf)
geoWASU (Grup de recerca)
Navarro Maestro, Pau
Navarro Fernández, Dídac
Garcia i Orellana, Jordi, tutor, (Universitat Autònoma de Barcelona. Departament de Física)
Zarroca Hernández, Mario, tutor, (Universitat Autònoma de Barcelona. Departament de Geologia)
Universitat Autònoma de Barcelona. Facultat de Ciències

Date: 2019
Description: 120 pag.
Abstract: Submarine groundwater discharge (SGD) is an important source of freshwater and nutrients to Mediterranean Sea, but is also related with anthropic pollution. Since the last decades a new emerging and successful ways to trace SGD appeared, as they are natural radioactive isotopes (223Ra, 224Ra, 226Ra, 228Ra and 222Rn) and electrical surveys (electrical resistivity tomography , ERT). Other methods have been less employed, but they have a great potential as electric induction (EI). This project describes and quantifies SGD and its nutrients driven input with these methods, never used before in Catalonia to asses SGD, in an anthropized coastal karstic massif. The study zone is Aiguadolç beach (Spain), the most southern beach in the Garraf massif, and the obtained SGD flows there were 9. 7 ± 2. 0 ·10(6) m3-km-1-yr-1, with the associated fluxes of DSi, DIN and DIP, which were 63 ± 13 mmol·m-2·d-1, 78 ± 16 mmol·m-2·d-1, and 432 ± 91 μmol·m-2·d-1, respectively. A NH4+ flux of 74 ± 16 mmol·m-2-d-1 was also estimated due to high concentration of NH4+ in groundwater. This concentration exceeds the legal limits of drinking water legislation. This high contamination suggests an anthropogenic influence of the aquifer which could be due to waste water leaking from urban, agricultural or livestock activity or the Garraf landfill itself. The study also evaluates the social conflict framed in Aiguadolç due to some issues that affect the beach in relation with SGD and outlet emergences, and propose some management actions that could improve the situation.
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Language: Anglès.
Studies: Ciències Ambientals [2501915] ; Geologia [2500254]
Study plan: Graduat o Graduada en Ciències Ambientals i Geologia [1208]
Document: bachelorThesis ; Text
Subject: SGD ; Submarine groundwater discharge ; Nutrients ; Geophysical surveys ; Radium ; Garraf massif ; Karst ; Social conflict



120 p, 7.4 MB

The record appears in these collections:
Research literature > Bachelor's degree final project > Sciences Faculty

 Record created 2019-04-08, last modified 2019-09-18



   Favorit i Compartir