TRiVIA

Toolbox for River Velocimetry using Images from Aircraft: TRiVIA

The Toolbox for River Velocimetry using Images from Aircraft, or TRiVIA for short, is an application to facilitate estimation of surface flow velocities in river channels from various types of remotely sensed data acquired with a nadir-viewing geometry (i.e., looking straight down). Spatially distributed information on flow speed is derived using a computational method known as Particle Image Velocimetry (PIV). TRiVIA provides an integrated workflow for video/image import and subsetting, image stabilization, geo-referencing, region of interest definition, image pre-processing, PIV, visualization, accuracy assessment relative to field measurements, discharge calculation based on an independent source of depth information provided by the user, moving aircraft river velocimetry, and export of results.