IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Operational constraints of mini-hidropower schemes considering brown trout habitat
Operational constraints of mini-hidropower schemes considering brown trout habitat
Author : ISABEL PRAGANA (1), ISABEL BOAVIDA (1), RUI CORTES (2), ANT¨ŽNIO PINHEIRO (1)
ABSTRACT
Hydropeaking occurs due to hydropower plant operation, when high discharges are made at a daily regular basis during
high electricity consumption periods. It severely affects the hydrologic regime and, consequently, the aquatic ecosystem.
To mitigate this tendency, either structural or operational measures have been proposed. Usually, structural measures
are selected over the others due to less economic impact on the electricity producer. Therefore, better understanding the
impacts of operational measures over the economics of electricity production is paramount in order to select solutions
that may address both interests. The present study investigates the effects of a mini-hydropower plant in the fish habitat
of brown trout considering different operational scenarios. Thus, the computational model River2D was applied to the
river reach immediately downstream of the Ermida hydropower plant in the Carvalhosa stream, to obtain the 2D
hydrodynamic features of different discharges. To perform the habitat modelling with the Casimir Fish 2D, fuzzy sets and
rules were developed for juvenile and adult life-stages of brown trout. The operational scenarios were developed
considering the habitat availability results and the power production periods according to the electricity selling price. The
influence of an hydropower plant operation on the habitat suitability, as well as the energy revenue losses related with
the production scenarios were taken into consideration. Results from this study may help in assisting water managers to
adapt hydropeaking regimes in order to reduce the ecological impact of hydropower production.
File Size : 524,795 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 19/08/2015
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