Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components

Seawater intrusion occurs in almost all coastal aquifers that are subject to human pressure. Its effects could be reduced by avoiding pumping in those wells better hydraulically connected to the sea. This paper presents a methodology to assess hydraulic connection to the sea of a well from its respo...

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Detalles Bibliográficos
Autores principales: Alcaraz, María del Mar, Carrera, Jesús, Cuello, Julián Eduardo, Guarracino, Luis, Vives, Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ingeniería Hidráulica
Geología
Groundwater management
Coastal aquifers
Tidal loading
Frequency components
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/130394
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-130394
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería Hidráulica
Geología
Groundwater management
Coastal aquifers
Tidal loading
Frequency components
Argentina
spellingShingle Ingeniería Hidráulica
Geología
Groundwater management
Coastal aquifers
Tidal loading
Frequency components
Argentina
Alcaraz, María del Mar
Carrera, Jesús
Cuello, Julián Eduardo
Guarracino, Luis
Vives, Luis
Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
topic_facet Ingeniería Hidráulica
Geología
Groundwater management
Coastal aquifers
Tidal loading
Frequency components
Argentina
description Seawater intrusion occurs in almost all coastal aquifers that are subject to human pressure. Its effects could be reduced by avoiding pumping in those wells better hydraulically connected to the sea. This paper presents a methodology to assess hydraulic connection to the sea of a well from its response to sea-level fluctuations. Head fluctuations in a well result from the superposition of hydraulic and hydro-mechanical responses. The hydraulic response requires a good hydraulic connection to the sea, whereas a hydro-mechanical response suggests a poor connection. Sea level fluctuates with a broad range of harmonics, which allows identification of the hydraulic and hydro-mechanical responses based on the harmonic frequency. It is shown that the response to low-frequency harmonics is essentially hydraulic and the response to high-frequency harmonics is mainly hydro-mechanical. The proposed methodology facilitates the discrimination of both responses with the aim to study qualitatively the hydraulic connection to the sea. This methodology is applied to the aquifer system of La Plata river estuary in western Argentina. Surprisingly, the hydraulic response of the deepest aquifer (Parana) is less damped than the response of the overlaying aquifer (Puelches). This finding suggests that the Parana aquifer is better connected to the sea than the Puelches.
format Articulo
Articulo
author Alcaraz, María del Mar
Carrera, Jesús
Cuello, Julián Eduardo
Guarracino, Luis
Vives, Luis
author_facet Alcaraz, María del Mar
Carrera, Jesús
Cuello, Julián Eduardo
Guarracino, Luis
Vives, Luis
author_sort Alcaraz, María del Mar
title Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
title_short Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
title_full Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
title_fullStr Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
title_full_unstemmed Determining hydraulic connectivity of the coastal aquifer system of La Plata river estuary (Argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
title_sort determining hydraulic connectivity of the coastal aquifer system of la plata river estuary (argentina) to the ocean by analysis of aquifer response to low-frequency tidal components
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/130394
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