Location

UMass Amherst

Event Website

http://fishpassage.ecs.umass.edu/Conference2012/

Start Date

5-6-2012 2:30 PM

End Date

5-6-2012 3:00 PM

Description

Until 1985 migration of riverine fish for instance salmon and sea trout through the river Rhine system has dramatically declined due to the tremendous decrease of water quality and the construction of river regulation works such as weirs and dams and hydropower stations. During the last decades the water quality in the Rhine and therefore the environmental circumstances for migratory fish has improved significantly. At the same time on international level a discussion was started on the feasibility of restoring fish migration. In 1987 all countries along the river Rhine adopted the Rhine Action Programme. One of the aims of this plan is to restore the main stream as the backbone of the complex Rhine ecosystem and its main tributaries as habitats for migratory fish. The construction of fishways at the three weirs in the river Neder-Rhine was the major Dutch activity in restoring the migration route in the Rhine. Accurate investigations of the behaviour of different fish species and the required migration circumstances, resulted in a design of spacious pool- and weir fishways as bypass channels in the floodplain. To enable migration of different migratory fish species during the various discharge situations of the river the channels have V-shaped weirs with vertical slots.

Comments

Kees Dorst received his Master Sc. degree in Hydraulic Engineering in 1995 at the University of Technology Delft, The Netherlands. He works as a senior specialist hydraulic engineering at the The Duth Ministry of Infrastructure and the Environment in the fields of:

-flood defence systems

-revetments

-river and coastal engineering

-dredging works

-fish passes

-integrated coastal zone management

-hydraulics and morphology

He works in different national and international advisory and working groups editing frameworks and guidelines.

He is a lecturer at IHE Delft.

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Jun 5th, 2:30 PM Jun 5th, 3:00 PM

Session A2 - Free access for riverine fish along the Dutch Rhine, hydraulics and construction of the Dutch Rhine fishways

UMass Amherst

Until 1985 migration of riverine fish for instance salmon and sea trout through the river Rhine system has dramatically declined due to the tremendous decrease of water quality and the construction of river regulation works such as weirs and dams and hydropower stations. During the last decades the water quality in the Rhine and therefore the environmental circumstances for migratory fish has improved significantly. At the same time on international level a discussion was started on the feasibility of restoring fish migration. In 1987 all countries along the river Rhine adopted the Rhine Action Programme. One of the aims of this plan is to restore the main stream as the backbone of the complex Rhine ecosystem and its main tributaries as habitats for migratory fish. The construction of fishways at the three weirs in the river Neder-Rhine was the major Dutch activity in restoring the migration route in the Rhine. Accurate investigations of the behaviour of different fish species and the required migration circumstances, resulted in a design of spacious pool- and weir fishways as bypass channels in the floodplain. To enable migration of different migratory fish species during the various discharge situations of the river the channels have V-shaped weirs with vertical slots.

http://scholarworks.umass.edu/fishpassage_conference/2012/June5/32