HIGH SPATIO-TEMPORAL MEASUREMENTS OF EROSION RATES OF COHESIVE SEDIMENTS USING PHOTOGRAMMETRIC METHODS
Authors:Silke Wieprecht Organization:IAHR
Knowledge about critical shear stress and erosion rates of cohesive sediments are fundamental to establish a sustainable sediment management in rivers worldwide. However, compared to non-cohesive sediments the incipient motion of cohesive sediments is more complex given the large number of interacting physical, chemical and biological parameters. This article describes a novel method to measure erosion rates in laboratory flumes using photogrammetric methods in a high spatio-temporal resolution. In addition, a Vectrino profiler is applied to account for changes in Reynolds shear stresses given the changing roughness of the sediment surfaces. The results show that the photogrammetric method allows for the detection of minimal erosion volumes of <10 mm on a surface of 8000 mm, while the Vectrino profiler proved to be a suitable device considering the influence of roughness on bed shear stresses
Title: HIGH SPATIO-TEMPORAL MEASUREMENTS OF EROSION RATES OF COHESIVE SEDIMENTS USING PHOTOGRAMMETRIC METHODS
Event: 37th IAHR World Congress2017年08月14-18日
Silke Wieprecht

IAHR

niversit?t Stuttgart

Department of Civil and Environmental Engineering

Institute of Hydraulic Engineering

GERMANY

(elected until 2019 R) Statement

(NB R* means eligible for re-election for a second term)
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