RESERVOIR SEDIMENTATION ASSESSMENT GUIDELINE - Aneel

Reservoir Sedimentation Assessment GuidelineVelocidade de fundo = bottom velocityVelocidade capaz do leito = bed capable velocityVelocidade média = average velocityDiâmetro de partículas = particles diameterUse of tractive power – Tractive power, or shearing strength, is the tension acting overthe channel bed wet area, and may be expressed as:τ = γpS (13.6)where,τ = tractive power ( kg/m 2 or lb/ft 2 )γ = water specific weight ( kg/m 3 or 62,4 lb/ft 3 )p = average depth (m or ft)S = hydraulics gradientWhen the tractive power is computed for main discharge, the curves for tractivepower presented in Figure 13.5 may be used in order to determine the average diameterof the the bed material shield thickness diameter.ANEEL – Brazilian Electricity Regulatory Agency / SIH – Hydrologic Studies and Information Department82