Vladimir Nikora

TL;DR: A new method for detecting spikes in acoustic Doppler velocimeter data sequences is suggested and it is shown to have superior performance to various other methods and it has the added advantage that it requires no parameters.

TL;DR: In this article, the double-averaged momentum equations were used as a natural basis for the hydraulics of rough-bed open-channel flows, especially with small relative submergence, and the relationships for the vertical distribution of the total stress for the simplest case of 2D, steady, uniform, spatially averaged flow over a rough bed with flat free surface were derived.

TL;DR: In this article, the authors discuss the spatial averaging concept in environmental hydraulics and develop it further by considering transport equations for fluid momentum, passive substances, and suspended sediments.

TL;DR: In this paper, three sets of measurements with acoustic Doppler velocimeters in an irrigation canal were used: two with subcritical bed shear stress (static beds) and one with the bedshear stress τo close to critical τoc (weakly mobile bed), and the analyses included vertical distributions of local mean velocities, turbulence intensities, turbulent shear stresses, velocity auto- and cross-spectra, the quadrant method, and high-order velocity moments.

TL;DR: In this article, the authors argue that large-scale temporal events predominantly affect lotic ecosystems through physical drag processes ('drag-disturbance'), whereas small-scale flow variations affect ecosystems through mass-transfer processes (including invertebrate and fish food-uptake).