In the world professional literature can find many formulae and the nomograph using to apprise of sediment trap efficiency of water reservoirs. Sediment trap efficiency of water reservoirs, introduces in the form of nomograph or formulae, is defined in the function of the coefficients which they are the most often: capacity- inflow ratio – C/I and capacity-watershed ratio – C/W. The reservoir sediment trap efficiency is determined from Ĺopatin’s, Drozd’s, Karaušev’s, Brune’s formulae in dependence on the capacity-inflow ratio. The C/W ratio is used methods of Brune-Allen’s, Brown’s and Gottschalk’s. Churchill defined the reservoir sediment trap efficiency in function of sedimentation index. Qualification of sediment trap efficiency of small water reservoirs creates considerable difficulties, because the majority of existing formulae and nomograph using to apprise of sediment trap efficiency was worked out in the result of the investigations of large and middle water reservoirs. The results of real sediment trap efficiency of the small water reservoir βrz in the following years of operation were introduced in this work. Sediment trap efficiency was qualified on the basis of several the measurements of silting and on the basis of calculations of the quantity of suspended sediment delivered to the water reservoir. The ...
