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Fish migration in polder areas: evaluation of a De Wit fishpass
Viaene, P.; Mostaert, F.; Quataert, P.; Verbiest, H.; De Charleroy, D. (2004). Fish migration in polder areas: evaluation of a De Wit fishpass, in: de Jalón Lastra, D.G. et al. (Ed.) Proceedings of the Fifth International Symposium on Ecohydraulics. Aquatic Habitats: Analysis & Restoration, September 12-17, 2004, Madrid, Spain. IAHR Congress Proceedings, : pp. 1046-1051
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., more
In: IAHR Congress Proceedings. The Institution of Engineers: Barton. ISSN 0074-1477, more

Available in Authors 
Document type: Conference paper

Keywords
    Fish; Fishways; Migrations; Polders

Authors  Top 
  • Verbiest, H., more
  • De Charleroy, D., more

Abstract
    As water conservation is an important item in the management of polder areas during a part of the year, water courses in these areas contain many regulating constructions. Such constructions can affect the free movement of migrating fish to and from these areas. Problems can be solved by either removing the barriers or providing fish passage facilities. A possible solution for these areas is the so called de Wit fishpass, which was derived from a classical vertical slot fishpass. Experimental research has been done in order to evaluate the efficiency of this fishpass under several laboratory conditions. The aim of the research was to determine whether stream velocities and construction length were influencing the successfull clearing of the fishpass for several lowland fish species. Final goal was to present design rules for constructing successfull de Wit fishpasses on the field.

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