[1] Large-scale particle image velocimetry (LSPIV) is a nonintrusive approach to measure velocities at the free surface of a water body. The raw LSPIV results are instantaneous water surface velocity fields, spanning flow areas up to hundreds of square meters. Measurements conducted in typical conditions in conjunction with appropriate selections of parameters for image processing resulted in m...

An automated discharge imaging system (ADIS), a non-intrusive and safe approach, was 12 developed for measuring river flows during flash flood events. ADIS consists of dual cameras to 13 capture complete surface images in the near and far fields. Surface velocities are accurately measured 14 using the Large Scale Particle Image Velocimetry (LSPIV) technique. The stream discharges are then 15 ob...

Large-Scale Particle Image Velocimetry (LSPIV) is an extension of a quantitative imaging technique to measure water surface velocities using simple and inexpensive equipment. This paper describes the implementation of imaged-based LSPIV in eight different environmental flow and hydraulic engineering applications for the investigation of complex configurations with and without sediment transport...

In recent years field-scale applications of image-based velocimetry methods, often referred to as large scale particle image (LSPIV), have been increasingly deployed. These measurements several advantages—they allow high resolution, non-contact measurement surface velocity over a two dimensional area, from which the bulk flow can be inferred. However, visiblelight LSPIV methods significant limi...

Large-scale particle image velocimetry (LSPIV) provides a cost-effective, rapid, and secure monitoring tool for streamflow measurements. However, surveys of ground control points (GCPs) might affect the camera parameters through solution collinearity equations then impose uncertainty on measurement results. In this paper, we explore present an analysis image-based measurements with main focus p...

Large-Scale Particle Image Velocimetry (LSPIV) is an effective method for the measurement of the river surface flow velocity. For the wide cross-section river, in the near-field area of river surface image there are small and clear targets. But the flow tracers are almost invisible in the far-field area because of the resolution limit of one single video camera, which makes it difficult to comp...

Abstract Ship-induced wave wash affects the hydromorphological and ecological state of rivers through various mechanisms. The direct proximity riverbank is usually most exposed, as hydrodynamic stresses are highest in these shallow water areas. Contrary to steady almost still, natural flow conditions (i.e., no waves anthropogenic source), shoaling breaking ship increase by orders magnitudes, ha...

The accuracy of river velocity measurements plays an important role in the effective management water resources. Various methods have been developed to measure velocity. Currently, image-based techniques provide a promising approach avoid physical contact with targeted bodies by researchers. In this study, measured surface velocities collected under low flow and high conditions Houlong River, T...