University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Dorian Shire-Peterlechner
(2020):
Pre-study for a large-scale RFID tracer sediment transport process investigation at the Urslau Stream.
Master / Diploma Thesis - Institut für Wasserbau, Hydraulik und Fließgewässerforschung (IWA),
BOKU-Universität für Bodenkultur,
pp 113.
UB BOKU
obvsg
- Abstract:
- Detailed knowledge of sediment transport and transport behavior in alpine streams is essential for protection and mitigation measures against natural hazards and the anthropogenic use of alpine streams. To improve sediment transport formulae and models, tracer experiments are necessary. Next to basket samplers and slot samplers, as well as geophone plates for an overall examination, it is important to go further to the single particle scale for analyzing transport characteristics. Tracing single particles using passive RFID technology has proven best usability within alpine streams. Since RFID tags are small, price-efficient and durable, the use in sediment monitoring applications is evident. The objective of this paper is the application of RFID technology with the use of native stream sediments at the Urslau Stream in Salzburg. With the installation of a permanent RFID set up at three locations along the river stretch and search campaigns with mobile RFID antennas within a defined search stretch, this innovative tracing technology will be validated by analyzing first collected data. A stationary pass-over RFID antenna was designed for the use in the Urslau Stream. Best results were achieved with the dimensions of 8 m times 0.5 m and a detection range of 0.73 m. After installing two prototypes in 2017, a permanent RFID monitoring setup was accomplished in 2018 by constructing three RFID stations with a total of seven stationary RFID antennas. The mobile RFID antenna search campaign’s method was developed achieving recovery rates between 84-100 %. First results show mean tracer stone transport velocities of 2.1E-04 m/s and maximum 1.3E-03 m/s. With first detections at the stationary antenna much greater transport velocities were measured (mean 4.9E-03 m/s und max 2.2E-02 m/s). It is assumed, that tracer stones compared to the mobile search campaigns are transported without resting periods through the river section and for the first time measuring the average particle velocity is possible. 0.022
- Beurteilende*r: Habersack Helmut
- 1.Mitwirkender: Lammer Andrea