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Gewählte Master / Diploma Thesis:

Christoph Schachenhofer (2016): Vergleichende Analyse der Bewegungscharakteristik von Steintracern vor und nach der Zugabe gröberer Kornfraktionen.
Master / Diploma Thesis - Institut für Wasserwirtschaft, Hydrologie und konstruktiven Wasserbau (IWHW), BOKU-Universität für Bodenkultur, pp 167. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
In course of the pilot project Bad Deutsch-Altenburg measures were implemented to improve the ecological and navigational situation and to minimize the riverbed degradation. These measures were implemented at the same time to quantify the cumulative effects. Therefore, a monitoring program is necessary that includes biotic and abiotic subjects, also including tracer measurements. To investigate the current characteristics of the bed load transport in the project area, radio-telemetric tracers in three different sizes were used. This approach of single grain survey was already applied in the previous monitoring programs (2009 and 2014). The measurements of the postmonitoring were taken weekly by boat, from July 2015 until May 2016. The main goals are the survey of the pebble transport and comparisons to the existing measurements. Developments of the transportation processes, changes of river morphology and first conclusions of the project measures are important issues that are considered in this thesis. The analysis of the current data shows that the size-selective bed load transport and the connection of pebble transport to the morphologic conditions, which were measured during the premonitoring can be confirmed. Additionally, the increasing gravel transport with higher discharge and the tendency to shorter single distances are true as well for the postmonitoring. The transport velocity decreased within all the tracer sizes and the single distances were shorter as well. The probability of transport on the other hand increased in the category until 2000 m³/s. The variation of the investigated parameters can be explained by the lower average discharge during the observation period but also lead back to the implemented measures. To evaluate the whole dimension and the long-term effects it is important to include further monitoring programs and other river structural measurements. In general, the tracer technology is very useful to gauge bed load transport processes.

Beurteilende(r): Habersack Helmut
1.Mitwirkender: Liedermann Marcel Georg

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