Nose velocity calculation for spatial analysis of habitat and environmental flow assessments

For the enviromental flow assesments, physical habitat simulation was applied with the 2-dimentional software River 2D. Habitat suistability criteria for depth, mean velocity, nose height and nose velocity were considered for the native brown trout. The WUA flow functions were calculated for two alternatives: based on both depth and mean velocity as well as depth and nose velocity at a fixed height above the river bed.