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Gewählte Master / Diploma Thesis:

Johannes Roither (2015): GESCHIEBEMONITORING URSLAU: VERGLEICH VON DIREKTEN UND INDIREKTEN GESCHIEBEMESSMETHODEN.
Master / Diploma Thesis - Institut für Wasserwirtschaft, Hydrologie und konstruktiver Wasserbau (IWHW), BOKU-Universität für Bodenkultur, pp 155. UB BOKU obvsg

Data Source: ZID Abstracts

Abstract:: The process understanding of sediment transport in rivers is important for different areas of expertise. On the one hand science and on the other hand energy management, ecology, torrent and avalanche control, river navigation and flood protection management have a major need for consistent field data. Data of sediment transport measurements give information about the initiation of motion of bedload particles, transport rates, bedload transport yields and allow an analysis of the spatial and temporal variability of the transport process and the determination of the transported grain sizes. Furthermore, they provide the basis for the application and calibration of sediment transport formulas and numerical sediment transport models. The aim of this thesis was the implementation of indirect bedload measurements together with a bedload trap and a mobile bedload basket sampler at the Urslau River in Maria Alm /Salzburg. Suggestions have been compiled to improve measuring procedures (for example creation of measurement protocols) and the analysis and evaluation of measured bedload data. Further, results of direct measurements were compared to the results of the geophone device. This relation has been analyzed and changes in the data evaluation of direct bedload monitoring results have been examined. Beside others, an inclusion of a time delay of data recording, potential measurement errors (for example arising from a blockage of measurement devices by coarse sediments), filling stages of direct measurement devices and grain sizes of transported bedload material have been considered. This thesis has shown that the combination of several direct measurement devices (mobile basket sampler and bedload trap) is the best opportunity for the creation of a calibration function between direct and indirect measurement methods.; Beurteilende(r): Habersack Helmut; 1.Mitwirkender: Lammer Andrea