Aim of the paper The aim of the paper is to determine the hydraulic conditions in the high gradient meander-modular fish pass based on model tests in which the correct migration of aquatic organisms is ensured. Material and methods The concept of a new version of the meander fish pass was developed at the Water Laboratory at the University of Environmental and Life Sciences in Wroclaw. A characteristic feature of this fish pass, in addition to its compactness, is the modular structure that can be expanded in any way. The idea of a high gradient meander fish pass is based on a helical surface. The tests were performed on a 1 : 3 scale model based on the Froude similarity criterion. Important elements of the research were measurements of point velocities, stream distribution and turbulence at variable Q flow. Results and conclusions The tested fish pass model for high gradient meets the basic design assumptions. Velocities in chambers do not exceed the permissible values for fish. At resting places, the velocity does not exceed the limit. The distribution of streams shows that resting places with reduced flow velocities are created inside the chambers. The main difference between meander passes and traditional slot passes is the type of flow in the pools as well as the reduction of energy. The conducted tests show that the water velocities in the interstices of this fish pass are higher than in the slot gaps. The authors recommend designing more pools than for traditional constructions.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.