Fish passage solutions in the upper Scheldt: restrictions and possibilities

Vereecken, H.; Viaene, P.; Meersschaut, Y.; Mostaert, F.; Verbiest, H.; De Charleroy, D.; De Nayer, B.

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Fish passage solutions in the upper Scheldt: restrictions and possibilities

Vereecken, H.; Viaene, P.; Meersschaut, Y.; Mostaert, F.; Verbiest, H.; De Charleroy, D.; De Nayer, B. (2004). Fish passage solutions in the upper Scheldt: restrictions and possibilities, in: de Jalón Lastra, D.G. et al. Proceedings of the Fifth International Symposium on Ecohydraulics. Aquatic Habitats: Analysis & Restoration, September 12-17, 2004, Madrid, Spain. IAHR Congress Proceedings, : pp. 1009-1013

In: de Jalón Lastra, D.G.; Vizcaíno Martinez, P. (Ed.) (2004). Proceedings of the Fifth International Symposium on Ecohydraulics. Aquatic Habitats: Analysis & Restoration, September 12-17, 2004, Madrid, Spain. IAHR Congress Proceedings. IAHR = AIRH: Madrid. ISBN 90-805649-7-4. Vol. 1 (1-751); Vol. 2 (755-1453) + cd-rom pp.

In: IAHR Congress Proceedings. The Institution of Engineers: Barton. ISSN 0074-1477

Available in	Authors
Waterbouwkundig Laboratorium: Open Repository 134983 [ OWA ] Waterbouwkundig Laboratorium: Congresverslagen [134987]
Document type: Conference paper

Keywords

Behaviour > Migrations
Fauna > Aquatic organisms > Aquatic animals > Fish
Guiding devices > Fishways
Bovenschelde [Marine Regions]
Fresh water

Authors		Top
Vereecken, H., more Viaene, P., more Meersschaut, Y. Mostaert, F., more	Verbiest, H. De Charleroy, D. De Nayer, B.

Abstract

Free migration of fish species in all hydrographic basins in Belgium, Luxemburg and the Netherlands should be guaranteed by 1 January 2010. Together with the renewal of three similar weir constructions on the Upper Scheldt, construction of a fish pass was investigated. A scale model (1/10) of the weirs and the downstream channel showed that the entrance of the fish passage should be between 20 and 30 m downstream of the weir, in combination with a dike dam which leaves an opening over the total depth of the flume. The discharge to attract fish seemed about 10 to 15% of the most occuring discharge of the Upper Scheldt. Tests with juvenile fish species confirmed the above findings. By adding natural roughness elements the length of the preferred more natural bypass channel could be reduced by about factor 8 to an acceptable length on the field.

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