Water quality tools are necessary to control and prevent eutrophication in reservoirs, particularly reservoirs with aquaculture cages because these lead to nutrient loads from fish food. A combined bioenergetic and water quality model was implemented in this study to assess the contribution of aquaculture activity to algal growth in El Pañe Reservoir, Peru. In addition to its complexity, four different algal groups (Chlorophyta, Cyanobacteria, Chrysophyta, and Cryptophyta) were modeled according to their dominance in the water column of El Pañe Reservoir. Moderately reasonable distribution plots of chlorophyll-a were obtained when calibrating the model despite data scarcity and low R2 values (0.04 in the intermediate zone and 0.16 in the dam zone of the reservoir). Six scenarios of annual aquaculture production were analyzed, and the scenario with an annual fish production of 100 000 kg increased Cyanobacteria blooms to a dangerous level. Furthermore, the results indicate that an annual aquaculture production of 36 000 kg still requires careful consideration in terms of its impact on the water quality of El Pañe Reservoir.
Bibliographical noteFunding Information:
This study was supported by Universidad Nacional de San Agustin de Arequipa through Financing Contract N° 039-2017-UNSA
The research was done according to ethical standards. The authors are grateful to Universidad Nacional de San Agustin de Arequipa for the research funds program that let this research be done. The authors wish to thank to Autoridad Autonoma de Majes (AUTODEMA) through Gerencia Ejecutiva, Gerencia de Recursos Hidricos, Sub Gerencia de Operacion y Mantenimiento and their Team of Water Quality Monitoring. Thanks are also extended to the institution Autoridad Nacional del Agua (ANA), Servicio de Agua Potable y Alcantarillado de Arequipa (SEDAPAR), and the Aquaculture producers of El Pa?e Reservoir for data availability. Also the authors wish to thank to Fabricio Mejia Medina and Violeta Garcia from Universidad Nacional de San Agustin de Arequipa, and Steven Chapra from Tufts University for their contribution, advice, and opinion in the project. This study was supported by Universidad Nacional de San Agustin de Arequipa through Financing Contract N? 039-2017-UNSA
© 2020 European Regional Centre for Ecohydrology of the Polish Academy of Sciences
- Water quality