Effect of turbidity on substrate, fish and benthic invertebrates in the river Alpenrhein.
Abstract
In the river Alpenrhein power plants cause daily high changes of discharge. Every surge of flow mobilizes fine sediments, which lead to increased turbidity. Although the turbidity is low in comparison to floods, it has strong impacts on the aquatic biocoenosis, espacially during wintertime, when the Alpenrhein naturally is characterized by a clear water period. As a consequence - together with other anthropogenic impacts like regulation etc. - the biomass of the bentic invertebrates as well as the fish stock is by far lower than in other, also regulated and surge- affected rivers of similar characteristics. The aim of this interdisciplinary projekt is to evaluate which parameters, influenced by the surge and the related turbidity, are the main damaging factors.
surge turbidity river Alpenrhein Switzerland Austria
Publikationen
Project staff
Jürgen Eberstaller
Dipl.-Ing. Dr.nat.techn. Jürgen Eberstaller
Project Leader
01.01.1999 - 31.12.2001
BOKU partners
External partners
ARGE Limnologie
none
partner
Schälchli & Abegg
none
partner
Limnex AG
none
partner
University of Innsbruck, Institut für Zoologie und Limnologie
none
partner