Using a numerical model (PROTECH) to examine the impact of water transfers on phytoplankton dynamics in a Mediterranean reservoir

Moreno-Ostos, Enrique; Elliott, J. Alex; Cruz-Pizarro, Luis; Escot, Carmelo; Basanta, Ana; George, D. Glen. 2007 Using a numerical model (PROTECH) to examine the impact of water transfers on phytoplankton dynamics in a Mediterranean reservoir. Limnetica, 26 (1). 1-11.

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El Gergal is the last link in a system of reservoirs located in the Rivera de Huelva River, Seville (South-West Spain). Because of its position within the system and the different water transfer possibilities between reservoirs, the florisitic composition of phytoplankton in El Gergal can be strongly influenced by the concentration of cells present in the water transferred from other reservoirs in the series. In June 2000 a large Ceratium hirundinella inoculums was transferred from an upstream reservoir in El Gergal. The dinoflagellate inoculums enterd in the receiving reservoir through the riverine zone depicting a marked horizontal structure, and inducing an intense summer bloom. Our results show that this Ceratium bloom was effective to compete and counteract the later development of the harmful cyanobacteria Aphanizomenon flos-aquae. Further, after the integration of a set of adapations to the semi-arid Mediterranean region and subsequently validation, the PROTECH model (a 1D phytoplankton community model) was used to describe, assess and evaluate the potential impact on El Gergal phytoplankton dynamics of an alternative water transfer strategy. Finally, we encourage the use of dynamic modelling in lakes and reservoir management, as it constitutes a powerful tool that should offer reliable predictions and help managers in the usually difficult and complex task of adopting optimal decisions, in order to minimise water treatment costs and provide the best possible environmental quality.

Item Type: Publication - Article
Programmes: CEH Programmes pre-2009 publications > Water
UKCEH and CEH Sections/Science Areas: Parr
ISSN: 0213-8409
Additional Information. Not used in RCUK Gateway to Research.: The full text of this paper is available from the journal website.
Additional Keywords: water transfer, reservoir system, El Gergal reservoir, PROTECH, dynamic modelling, phytoplankton succession
NORA Subject Terms: Biology and Microbiology
Ecology and Environment
Date made live: 12 Dec 2007 10:12 +0 (UTC)

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