Integrative sediment management plan based on hydrodynamic-numerical modelling to maintain habitat conditions for anadromous brown trout and Atlantic salmon in the Aurlandselva / Western Norway (2013 - 2017)
Abstract
Historically, the Aurlandselva was known as one of the most important rivers for sea trout in Western Norway. Located at the end of the Sognefjord the short river exhibited every year an impressive sea trout run to the well distributed spawning sites. However, hydropower use and the altered flow regime as well as river training measures mainly for flood protection issues degraded river morphology and habitat dynamics decisively. Aim of the project is, based on collaborative research work with Norwegian fish specialist, to develop mitigation measures to improve both, spawning sites as well as habitats for the sensitive juvenile age classes. Within this framework of possible mitigation measures artificial gravel dumping, mechanical replenishing of bed surface material and possibilities for improving self-forming processes will be tested. Detailed analysis and suggestions for the design of measures will be worked out based on various hydrodynamic-numerical model components which are dealing with unsteady flow dynamics as well as possible changes in river morphology due to modelling of sediment transport.
keywords river restoration spawning habitat restoration ecohydraulics sea trout Atlantic salmon
Publikationen
Project staff
Christoph Hauer
Priv.-Doz. Dipl.-Ing. Dr.nat.techn. Christoph Hauer
christoph.hauer@boku.ac.at
Tel: +43 1 47654-81912
BOKU Project Leader
11.01.2017 - 31.12.2017
BOKU Project Leader
01.12.2013 - 02.05.2016
Michael Tritthart
Assoc. Prof. Priv.-Doz. Dipl.-Ing. Dr.techn. Michael Tritthart
michael.tritthart@boku.ac.at
Tel: +43 1 47654-81910
BOKU Project Leader
03.05.2016 - 10.01.2017
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
Sub Projectleader
01.12.2013 - 31.12.2017
BOKU partners
External partners
Uni Environment Bergen / Norway
Dr. Ulrich Pulg
coordinator