Abstract
This chapter presents a summary of the main limnologic aspects of the San Roque reservoir performed over more than 15 years of monitoring and analysis of its water quality. Sampling, transportation and analysis has been jointly performed by members of the National Water Institute, Department of Applied Limnology and Water Quality of INA-CIRSA in collaboration with numerous institutions including Aguas Cordobesas SA (Water Company), the water authority of the Province of Córdoba (DiPAS), the National University of Córdoba (UNC), the Catholic University of Córdoba (UCC), the Office of Boating Safety and the Police Task Force (CEP) of the local government, among others.
Results presented here demonstrate that the San Roque reservoir can be classified as eutrophic to hypereutrophic. The annual values of transparency are usually close to 1 m, chlorophyll-a exceeds 20 μg L−1, and total phosphorus (TP) concentration is higher than 48 μg L−1. The reservoir can also be defined as a warm monomictic lake, whose stratification can begin in September and be established during the summer (December–February), with a warmer surface layer between 0 and 6–9 m deep. Because of its eutrophic status, frequent algae blooms occur in the reservoir. Cyanobacteria, mainly represented by Dolichospermum spp. and Microcystis spp., grow mainly during the spring, summer and fall and alternate with blooms of the dinoflagellate Ceratium hirundinella. When the reservoir is mixed, typically in late autumn, winter and early spring, there is a prevalence of chrysophytes (Bacillariophyceae), being Cyclotella sp. the species most often present. Cyanobacteria produce toxins, mainly microcystins (MC), whose concentration can reach 32.7 μg L−1, exceeding the safe limit suggested by the WHO (Guidelines for Safe Recreational Water Environments. Coastal and Freshwaters. World Health Organization, Geneva, 2003), posing a risk for both touristic activities and sport fishing at the reservoir.
More information about the study area, monitoring design, characteristics of the study area and scope of results can be found in the official website of the National Water Institute (www.ina.gob.ar).
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Rodriguez, M.I., Ruiz, M. (2016). Limnology of the San Roque Reservoir. In: Wunderlin, D.A. (eds) The Suquía River Basin (Córdoba, Argentina). The Handbook of Environmental Chemistry, vol 62. Springer, Cham. https://doi.org/10.1007/698_2016_467
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DOI: https://doi.org/10.1007/698_2016_467
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