Spawning habitat restoration for Atlantic salmon in Norway based on numerical modelling
Abstract
Like for any other salmonid species spawning habitat and spawning success of Atlantic salmon has to be related to the availability of specific grain sizes in discrete meso-units with sufficient oxygen supply due to high near bottom flow velocities (mostly, riffles and pool tails). However, the availability of spawning gravel is often restricted due to man-made influences like river regulations, impoundment of tributaries or gravel mining. Moreover, in some rivers the availability of suitable spawning substrate might be naturally restricted by an interruption of the sediment continuum due to lakes formed by glacier processes (terminal moraine). Those sites are frequently documented in the Western mountainous regions of Norway. Within the project (in cooperation with LFI Uni Research Bergen) six different sites will be numerically tested (hydraulic, sediment transport) to determine the current status of spawning habitats, mitigation options and possibilities for restorations.
Publikationen
Project staff
Helmut Habersack
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Dr.h.c. Helmut Habersack
helmut.habersack@boku.ac.at
Tel: +43 1 47654-81901, 81911
BOKU Project Leader
31.07.2011 - 31.12.2014
Christoph Hauer
Priv.-Doz. Dipl.-Ing. Dr.nat.techn. Christoph Hauer
christoph.hauer@boku.ac.at
Tel: +43 1 47654-81912
Sub Projectleader
31.07.2011 - 31.12.2014