Nº.66. Automatic floodgate for the salmon

J.M. García Nájera Affiliation: Instituto Forestal de Investigaciones y Experiencias (IFIE) Biography: Not available Cerrar

J.M. García Nájera About the authors  Publication year: 1953 Language: Spanish, with summaries in English, French and German Subjects: Environment, Animal Collection: IFIE Publications, IFIE Serial Monographs Free eBook

Review:

The passage of migrating fish at dams of a height of about 10 m offers no more any difficulty, but there remains still to find a solution for fish passages at great barrages which are now very frequent. An immediate solution of this problem is urgently felt if there are to be conserved the valuable species abounding in the Spanish rivers and amongst them especially the salmon. In this paper is studied and described in detail an automatic fish pass, actioned by mere hydraulic power and composed of simple, robust and inalterable organs, permitting the fish to overcome, without danger and fatigue, all kind of obstacles of any height. A pilot model, in reduced scales, of a dam 20 m high has shown its perfect hydraulic working and it is to be hoped that, according to the arguments exposed in this paper, there will be obtained also satisfactory result from the biological point of view.

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