Comparison of fish impingement by a thermal power station with fish populations in the Ems Estuary
In: Journal of Fish Biology. Fisheries Society of the British Isles: London,New York,. ISSN 0022-1112; e-ISSN 1095-8649, meer
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| Author keywords |
cooling water extraction; impingement; estuarine fish populations; |
| Auteurs | | Top |
- Hadderingh, R.H.
- Jager, Z., meer
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| Abstract |
On an annual basis >10 million individuals of c. 35 fish species are impinged at the EC20 unit of the Eems power station located on the Ems Estuary. The most abundant are: herring Clupea harengus, gobies (Gobiidae), Nilsson's pipefish Sygnathus rostellatus, three-spined stickleback Gasterosteus aculeatus and sprat Sprattus sprattus. The impingement shows a seasonal pattern which reflects the presence of the fishes in the estuary. The results are compared with other impingement studies at power stations on the Belgian and Dutch estuaries.
In 1995, the cooling water entrance was displaced from the shoreline to 300 In off the coast at the edge of the tidal channel. The effect of this relocation on the level of fish impingement, determined by comparing the ratio of fish density in the cooling water and in the estuary before (1992-1993) and after (1996-1997) the relocation of the intake canal is discussed. |
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