Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling
Collisions, shear events and barotrauma are severe causes of fish mortality in a hydroelectric turbine. Fish-adapted turbine management and environmentally enhanced turbines can be mitigation measures. To use those measures efficiently, knowledge about turbine mortality is needed. In this study, a c...
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ftrepec:oai:RePEc:eee:renene:v:147:y:2020:i:p1:p:1481-1490 2024-04-14T08:00:59+00:00 Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling Klopries, Elena-Maria Schüttrumpf, Holger http://www.sciencedirect.com/science/article/pii/S0960148119314508 unknown http://www.sciencedirect.com/science/article/pii/S0960148119314508 article ftrepec 2024-03-19T10:32:05Z Collisions, shear events and barotrauma are severe causes of fish mortality in a hydroelectric turbine. Fish-adapted turbine management and environmentally enhanced turbines can be mitigation measures. To use those measures efficiently, knowledge about turbine mortality is needed. In this study, a combination of CFD modelling, fish passage modelling and mortality assessment was used to evaluate mortality for different operating points of a Kaplan bulb turbine for adult European eels (anguilla anguilla). Calculated mortality due to collisions varied from 22% to 37%, due to shear events from 7% to 14% and due to barotrauma from 0% to 18%. The operating points with discharges between 70% and 85% of maximum discharge yielded the lowest mortality values. This supports the idea that a fish-adapted turbine management is possible that gives preference to operating points that are less hazardous to fish than others. Based on this approach it is possible to distinguish the locations within a turbine where hazardous hydraulic conditions occur making it a valuable tool in the design process and the biological performance evaluation of a turbine-management plan without needing to implement it first. Furthermore, no animal experiments are necessary for this approach. CFD modelling; Fish passage; Kaplan turbine; Turbine mortality; Turbine evaluation; Article in Journal/Newspaper Anguilla anguilla RePEc (Research Papers in Economics) |
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RePEc (Research Papers in Economics) |
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Collisions, shear events and barotrauma are severe causes of fish mortality in a hydroelectric turbine. Fish-adapted turbine management and environmentally enhanced turbines can be mitigation measures. To use those measures efficiently, knowledge about turbine mortality is needed. In this study, a combination of CFD modelling, fish passage modelling and mortality assessment was used to evaluate mortality for different operating points of a Kaplan bulb turbine for adult European eels (anguilla anguilla). Calculated mortality due to collisions varied from 22% to 37%, due to shear events from 7% to 14% and due to barotrauma from 0% to 18%. The operating points with discharges between 70% and 85% of maximum discharge yielded the lowest mortality values. This supports the idea that a fish-adapted turbine management is possible that gives preference to operating points that are less hazardous to fish than others. Based on this approach it is possible to distinguish the locations within a turbine where hazardous hydraulic conditions occur making it a valuable tool in the design process and the biological performance evaluation of a turbine-management plan without needing to implement it first. Furthermore, no animal experiments are necessary for this approach. CFD modelling; Fish passage; Kaplan turbine; Turbine mortality; Turbine evaluation; |
format |
Article in Journal/Newspaper |
author |
Klopries, Elena-Maria Schüttrumpf, Holger |
spellingShingle |
Klopries, Elena-Maria Schüttrumpf, Holger Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling |
author_facet |
Klopries, Elena-Maria Schüttrumpf, Holger |
author_sort |
Klopries, Elena-Maria |
title |
Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling |
title_short |
Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling |
title_full |
Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling |
title_fullStr |
Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling |
title_full_unstemmed |
Mortality assessment for adult European eels (Anguilla Anguilla) during turbine passage using CFD modelling |
title_sort |
mortality assessment for adult european eels (anguilla anguilla) during turbine passage using cfd modelling |
url |
http://www.sciencedirect.com/science/article/pii/S0960148119314508 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0960148119314508 |
_version_ |
1796305820528410624 |