490575049
58
M. Mokwa
such as the size of the fishway, the location of the entrances and the water level, flow and velocity. The calculation procedurę depends on the type and fonu of the fishway and the water flow conditions. For technical fishways (chamber. verical slot and Denila types), classical hydraulic formulae of outflow or overflow are generally applied. For natural fishways, the calculation process is morę complicated. For example, in designing a stone slipway-type fishway it is necessaiy to determine the roughness coefficient, the medium and maximum velocities, as well as the maximum flow at a given water level. Besides. stream distributions, attracting currents, and sediment movement should be considered. which necessitates using mathematical models. The paper presents the procedures of hydraulic calculations for various fishway constructions.
Key >vords: fishways, hydraulic calculations
Zaakceptowano do druku -Accepted for print: 21.05.2010
Acta Sci. Pol.
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