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Temporal and spatial variability in the Guadalquivir estuary: a challenge for real-time telemetry

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Abstract

Meteorological, hydrological, and hydrodynamic data for 3 years (2008–2010) have been used to document and explain the temporal and spatial variability of the physical–biogeochemical interactions in the Guadalquivir River Estuary. A real-time, remote monitoring network has been deployed along the course of the river between its mouth and Seville to study a broad range of temporal scales (semidiurnal, diurnal, fortnightly, and seasonal). This network consists of eight hydrological monitoring stations capable of measuring temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll fluorescence at four depths. In addition, six stations have been deployed to study hydrodynamics, obtaining 20-cell water column current profiles, and there is a meteorological station at the river mouth providing data for understanding atmospheric interactions. Completing this data-gathering network, there are several moorings (tide gauges, current/wave sensors, and a thermistor chain) deployed in the estuary and river mouth. Various sources of physical forcing, such as wind, tide-associated currents, and river discharge, are responsible for the particular temporal and spatial patterns of turbidity and salinity found in the estuary. These variables force the distribution of biogeochemical variables, such as dissolved oxygen and chlorophyll fluorescence. In particular, episodes of elevated turbidity (when suspended particle matter concentration >3,000 mg/l) have been detected by the network, together with episodes of declining values of salinity and dissolved oxygen. All these patterns are related to river discharge and tidal dynamics (spring/neap and high/low tide).

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Acknowledgements

This project was supported by the Autoridad Portuaria de Sevilla (APS) and by the Consejería de Innovación, Ciencia y Empresa (Junta de Andalucía). MODIS images have been processed in the context of P09-RNM-4583 Project. Thanks are due to all the APS technicians and divers of AGUAYO S.L. who participated. The authors also thank, in particular, David Roque, Raúl García, Joaquín Pampin, and Antonio Moreno (ICMAN-CSIC) for their assistance.

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Authors and Affiliations

  1. Department of Ecology and Coastal Management, Instituto de Ciencias Marinas de Andalucía ICMAN-CSIC, Puerto Real, Spain

    Gabriel Navarro, Francisco Javier Gutiérrez, Manuel Díez-Minguito, Miguel Angel Losada & Javier Ruiz

  2. Grupo de Dinámica de Flujos Ambientales, Universidad de Granada, Granada, Spain

    Gabriel Navarro, Francisco Javier Gutiérrez, Manuel Díez-Minguito, Miguel Angel Losada & Javier Ruiz

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  1. Gabriel Navarro
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  2. Francisco Javier Gutiérrez
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  3. Manuel Díez-Minguito
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  4. Miguel Angel Losada
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  5. Javier Ruiz
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Corresponding author

Correspondence to Gabriel Navarro.

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Responsible Editor: Aida Alvera-Azcárate

This article is part of the Topical Collection on Multiparametric observation and analysis of the Sea

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Navarro, G., Gutiérrez, F.J., Díez-Minguito, M. et al. Temporal and spatial variability in the Guadalquivir estuary: a challenge for real-time telemetry. Ocean Dynamics 61, 753–765 (2011). https://doi.org/10.1007/s10236-011-0379-6

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  • DOI: https://doi.org/10.1007/s10236-011-0379-6

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