IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 33rd Congress - Vancouver (2009) : Topic A: Advances in the Fundamentals of Water Science and Engineering : An imaging technique for laboratory water depth measurement of rapidly varying flows
An imaging technique for laboratory water depth measurement of rapidly varying flows
Author : F. Aureli, A. Maranzoni, P. Mignosa and C. Ziveri
A recently proposed technique based on high resolution digital images for the acquisition of water depths in rapidly varying free surface flows is discussed. The addition of a coloring agent to the water allows to obtain a spatially distributed information of depths after the image conversion through a proper transformation function derived from a preliminary calibration. This technique was validated on the basis of the results of some laboratory dam-break tests by comparing water depth time series obtained from the post-processing of images with those returned by ultrasonic distance meters in six gauge locations. The influence of RAW and JPEG acquisition formats was investigated. The results show an accuracy comparable to that of ultrasonic transducers. The proposed imaging technique is thus preferable thanks to its capability of acquiring distributed water depth information for flows characterized by high spatial variability.
File Size : 636,593 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 33rd Congress - Vancouver (2009)
Article : Topic A: Advances in the Fundamentals of Water Science and Engineering
Date Published : 09/08/2009
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