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Lashofer A.,Institute For Wasserwirtschaft | Pelikan B.,University of Vienna
WasserWirtschaft | Year: 2011

Since about one decade Archimedean screws are being used for power generation. This comparatively new, ultra-lowhead technology is still a niche product. The presented work includes a site enquiry, an operator survey, extensive field measurements as well as a literature survey on fish tolerance. It evaluates the width of usage, the areas of application, operation experiences as well as needs for further investigation into the Archimedean screw turbine. This article summarises the current development of this hydro-power machine and furthermore offers essentials for decision-making in turbine selection at small hydro power sites.

Kreisler A.,University of Vienna | Kreisler A.,Institute For Wasserwirtschaft | Aigner J.,University of Vienna | Aigner J.,Institute For Wasserwirtschaft | And 4 more authors.
Osterreichische Wasser- und Abfallwirtschaft | Year: 2014

Bedload transport is an important aspect in the fields of river engineering, flood protection, torrent and avalanche control and ecology, as well as in the context of hydropower and waterway management. In addition to providing us with a better understanding of the process itself, bedload monitoring allows us to determine the initiation of motion of bedload particles, bedload transport rates and bedload yields – important variables for planning enhanced management strategies and implementing sustainable measures. Further, this monitoring data serves as the basis for selecting, applying, calibrating and validating bedload transport formulae and numerical models.As the bedload transport process is characterized by significant spatial and temporal variability and the specific conditions vary between monitoring stations, determining the most suitable measuring system is of great importance, as are standardization and quality assurance.This article provides an overview of bedload monitoring in Austria, introduces the methodology used to assess the bedload transport process, and presents selected results. © 2014, Springer-Verlag Wien.

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