Start Date

2018 2:35 PM

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Abstract

Worldwide fish passage has increasingly been restored during the last three decades by retrofitting barriers with fish passes. The accessibility and functionality of the entrance forms the key factor in the efficiency of fish passes. However, the knowledge of the behaviour of the different fish species as well as the entrance design is still insufficient with regards to migration barriers in large rivers with high flows and complex hydraulic conditions. Barriers in large rivers with confined space conditions, difficult topographies and/or hydraulic structures typically require fish passes with surplus attraction flow at the entrance. Within the framework of the design of large fish passes on European waterways, an innovative fish pass entrance concept and system elements have been developed and studied. The findings of the scientific researches are presented. Other elements are being developed and remain to be hydraulically and ethohydraulically investigated.

Share

COinS
 
May 16th, 2:35 PM

Improved Fish Pass Entrance Design Involving Surplus Attraction Flow

Worldwide fish passage has increasingly been restored during the last three decades by retrofitting barriers with fish passes. The accessibility and functionality of the entrance forms the key factor in the efficiency of fish passes. However, the knowledge of the behaviour of the different fish species as well as the entrance design is still insufficient with regards to migration barriers in large rivers with high flows and complex hydraulic conditions. Barriers in large rivers with confined space conditions, difficult topographies and/or hydraulic structures typically require fish passes with surplus attraction flow at the entrance. Within the framework of the design of large fish passes on European waterways, an innovative fish pass entrance concept and system elements have been developed and studied. The findings of the scientific researches are presented. Other elements are being developed and remain to be hydraulically and ethohydraulically investigated.