BECAS
FRITZ Laura Jesica
congresos y reuniones científicas
Título:
ECOLOGICAL STUDY AND RESTORATION PLANNING IN EUTROPHIC LAKES
Autor/es:
FRITZ, L. J.; A. SINISCALCHIA; DI MAGGIO, J.; ESTRADA, V.; GROSMAN F.; SANZANO, P.; GUERRERO, J. M.; BAGLIVI, J.C.; CRISAFULLI, M.; COLASURDO, J.M.; ZOTELO, C.; POLONIOLI, MARIANELA; PETTIGROSSO, R.; HOFFMEYER, M.; DÍAZ, MARÍA SOLEDAD
Lugar:
Barcelona
Reunión:
Congreso; 10th World Congress of Chemical Engineering; 2017
Institución organizadora:
EFCE
Resumen:
Eutrophication is the most important problem in lakes and reservoirs. Prediction and control of algae blooms constitute a priority infreshwater sources to ensure sustainability. While mechanistic models are powerful tools to describe freshwater ecosystems and to evaluateand plan water restoration strategies, they must be calibrated with field data from the lake under study. Estrada et al. (2011, 2015) propose amechanistic ecological model that includes dynamic mass balances for phytoplankton groups; zooplankton groups and local zooplanktivorousfish, as well as dissolved oxygen and main nutrients. In this work, we address monitoring, parameter estimation, validation and restorationplanning for Paso de las Piedras Reservoir, a non-stratified lake which is the drinking water source for two cities in Argentina. Field data werecollected during the period 2014-2016 and include nutrient, phytoplankton; dissolved oxygen, macro and microzooplankton, as well as bothzooplanktivorous and piscivorous fish biomass concentrations. The study of the phytoplankton community allows the identification of 189taxa. Zooplankton is represented by cladocera and copepoda groups. In the case of fish community, the novelty is that experimental data showthat the most representative in terms of biomass are Odontesthes bonariensis (zooplanktivorous) and Oligosarcus jenynsi (piscivorous). Based on the current ecological study, we extend our ecological model with dynamic mass balances for O. jenynsi, which is a predator of O. bonariensis. This is the first time an integral monitoring project is carried out, including fish and zooplankton population, in addition tonutrient and phytoplankton. The inclusion of main fish dynamics is relevant to evaluate the potential application of biomanipulation, a wellknownrestoration strategy. This technique can be complemented with bottom-up strategies like wetland construction and macrophytacultivation. Collected data during 2014 and 2015 have been used to calibrate the ecological model and data from 2016 have been used forvalidation. Both parameter estimation and dynamic optimization problems have been formulated within an equation oriented optimizationframework in gPROMS (PSEnterprise, 2015). The re-calibrated model provides a reliable tool for restoration planning.