M. Klinge, FISH MIGRATION VIA THE SHIPPING LOCK AT THE HAGESTEIN BARRAGE - RESULTS OF AN INDICATIVE STUDY, Water science and technology, 29(3), 1994, pp. 357-361
Citations number
6
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
In the Dutch part of the Rhine many hydraulic works (sluices, barrages
, etc.) are situated which are considered to be barriers for upstream
fish migration. Because of intensive shipping these works are always c
ombined with big shipping locks. Until recently no data were available
concerning fish migration via these locks. This was studied in the ri
ver Lek at the Hagestein barrage. Due to the short length of the study
period and few recaptured salmonids (salmon, sea trout, rainbow trout
) no conclusive evidence about the effects of the shipping lock on sal
monid migration was obtained. However, the results do suggest that the
Hagestein barrage complex forms a serious barrier for upstream migrat
ion of salmonids. Several other fish species on the other hand were ob
served to migrate through the lock. Therefore, depending on target spe
cies and management goals, the presence of shipping locks should be ta
ken into account when considering improving fish migration possibiliti
es.