Die numerische Modellierung naturnaher, strukturreicher Fliesgewasser erfordert eine topografisch... more Die numerische Modellierung naturnaher, strukturreicher Fliesgewasser erfordert eine topografische Datenbasis mit einem hohen Detaillierungsgrad. In dieser Dissertation wird ein Konzept fur die Erhebung und Verarbeitung von terrestrischen Laserscanning-Daten als Grundlage fur ein hoch aufgelostes Stromungsmodell speziell fur naturnahe Gewasser vorgestellt. Anhand von vier Beispielen wird diese Methodik angewendet. Zudem wird ein neues Schema zur Klassifizierung komplexer 3D-Stromungszustande als Grundlage fur eine okohydraulische Bewertung prasentiert.
Vorgeschlagene Zitierweise/Suggested citation: Czerny, Rebekka; Oberle, Peter; Nestmann, Franz (2... more Vorgeschlagene Zitierweise/Suggested citation: Czerny, Rebekka; Oberle, Peter; Nestmann, Franz (2014): Mehrdimensionale HNModellierung fischpassierbarer Raugerinne. In: Technische Universität Dresden, Institut für Wasserbau und technische Hydromechanik (Hg.): Simulationsverfahren und Modelle für Wasserbau und Wasserwirtschaft. Dresdner Wasserbauliche Mitteilungen 50. Dresden: Technische Universität Dresden, Institut für Wasserbau und technische Hydromechanik. S. 333-342.
filtering SUMMARY Terrestrial laser scanning (TLS) is a relatively new and reliable 3D survey tec... more filtering SUMMARY Terrestrial laser scanning (TLS) is a relatively new and reliable 3D survey technique which is now widely used. This method is particularly used in projects in which the geometrical structure of objects at the earth’s surface is to be determined. This paper reports on a project in which terrestrial laser scanning is applied to the threshold range of air and water. Using hydraulic modelling, this project aims to demonstrate that the structural and hydraulic conditions of a water body can be significantly improved by natural river restoration projects. The development of a high resolution digital terrain model (DTM) of the river channel with its foreland and the description of vegetation zones in potentially flooded areas are the foundation for this modelling. It is discussed, which geodetic survey methods provide the required data. Application of TLS to measure the topography of river beds, here in the project area at the river Wiese, is described. Effects are addre...
To design effective and efficient fish passage facilities at hydropower plants, the knowledge of ... more To design effective and efficient fish passage facilities at hydropower plants, the knowledge of swim behaviour of fish is essential. Therefore, living wild fish were investigated at different fish guidance structures in an experimental flume in a test section of 11 m length and 2.5 m width at water depths of about 0.6 m. Besides analysis of time data and manual recordings of the fish behaviour, video recordings of the fish movements can allow more detailed analysis of fish behaviour in different hydraulic situations. Thus, a videometry system was installed consisting of eleven synchronous cameras with overlapping views lined-up under dry conditions outside the flume. A 3D tracking algorithm was developed and implemented to analyse the video data. Core of the code is a motion-based multiple object tracking method, in which several objects can be tracked in 2D pixel-frame coordinates at the same time. After undistorting and stereo-calibrating the cameras, the 2D tracks are transferre...
Die numerische Modellierung naturnaher, strukturreicher Fliesgewasser erfordert eine topografisch... more Die numerische Modellierung naturnaher, strukturreicher Fliesgewasser erfordert eine topografische Datenbasis mit einem hohen Detaillierungsgrad. In dieser Dissertation wird ein Konzept fur die Erhebung und Verarbeitung von terrestrischen Laserscanning-Daten als Grundlage fur ein hoch aufgelostes Stromungsmodell speziell fur naturnahe Gewasser vorgestellt. Anhand von vier Beispielen wird diese Methodik angewendet. Zudem wird ein neues Schema zur Klassifizierung komplexer 3D-Stromungszustande als Grundlage fur eine okohydraulische Bewertung prasentiert.
Vorgeschlagene Zitierweise/Suggested citation: Czerny, Rebekka; Oberle, Peter; Nestmann, Franz (2... more Vorgeschlagene Zitierweise/Suggested citation: Czerny, Rebekka; Oberle, Peter; Nestmann, Franz (2014): Mehrdimensionale HNModellierung fischpassierbarer Raugerinne. In: Technische Universität Dresden, Institut für Wasserbau und technische Hydromechanik (Hg.): Simulationsverfahren und Modelle für Wasserbau und Wasserwirtschaft. Dresdner Wasserbauliche Mitteilungen 50. Dresden: Technische Universität Dresden, Institut für Wasserbau und technische Hydromechanik. S. 333-342.
filtering SUMMARY Terrestrial laser scanning (TLS) is a relatively new and reliable 3D survey tec... more filtering SUMMARY Terrestrial laser scanning (TLS) is a relatively new and reliable 3D survey technique which is now widely used. This method is particularly used in projects in which the geometrical structure of objects at the earth’s surface is to be determined. This paper reports on a project in which terrestrial laser scanning is applied to the threshold range of air and water. Using hydraulic modelling, this project aims to demonstrate that the structural and hydraulic conditions of a water body can be significantly improved by natural river restoration projects. The development of a high resolution digital terrain model (DTM) of the river channel with its foreland and the description of vegetation zones in potentially flooded areas are the foundation for this modelling. It is discussed, which geodetic survey methods provide the required data. Application of TLS to measure the topography of river beds, here in the project area at the river Wiese, is described. Effects are addre...
To design effective and efficient fish passage facilities at hydropower plants, the knowledge of ... more To design effective and efficient fish passage facilities at hydropower plants, the knowledge of swim behaviour of fish is essential. Therefore, living wild fish were investigated at different fish guidance structures in an experimental flume in a test section of 11 m length and 2.5 m width at water depths of about 0.6 m. Besides analysis of time data and manual recordings of the fish behaviour, video recordings of the fish movements can allow more detailed analysis of fish behaviour in different hydraulic situations. Thus, a videometry system was installed consisting of eleven synchronous cameras with overlapping views lined-up under dry conditions outside the flume. A 3D tracking algorithm was developed and implemented to analyse the video data. Core of the code is a motion-based multiple object tracking method, in which several objects can be tracked in 2D pixel-frame coordinates at the same time. After undistorting and stereo-calibrating the cameras, the 2D tracks are transferre...
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Papers by Rebekka Czerny