Bed topography reconstruction in a large amplitude meandering flume: application of close range photogrammetry

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Abstract

Natural rivers are characterized by continuous variations in bed topography, especiallyalong curved reaches. High resolution topographic data are necessary to analyze the mutualinteractions between the downstream flow and the cross-stream flow, which determine thedistribution of the bed-shear stress along the channel. Because of the difficulty in acquiring good andaccurate data in rivers, the major part of studies have been conducted in laboratory flumes. This paperreports on a laboratory study in which the automatic digital photogrammetric survey was applied toderive the high-resolution Digital Surface Model (DSM) of the bed topography in a large amplitudemeandering flume. In order to assess the advantages of the procedure, the bed profiles obtained by theDSM have been compared with those obtained using a servo-controlled vertical profiler (PV09) hasbeen operated and discussed.
Lingua originaleEnglish
pagine (da-a)440-444
Numero di pagine5
RivistaADVANCED MATERIALS RESEARCH
Volume875-877
Stato di pubblicazionePublished - 2014

All Science Journal Classification (ASJC) codes

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