Abstract The attention of researchers and engineers has been attracted to gabion weirs due their environmental, hydraulic, stability capabilities compared with solid weirs. One the possible problems is partial blockage caused by sedimentation upstream them. This research experiment investigates hydraulic performance broad-crested (GBCWs) an blockage. For this purpose, a total 147 experiments we...

This work aims to assess brown trout (Salmo trutta) passage through a free-flow pool-weir-type fishway with hydrodynamic notches and extreme water drops between pools. It consists of an old-school design, commonly constructed in salmon rivers Spain during the period 1950–1980. To their performance, field test was designed confined trial conditions spawning migratory season. The mean drop pools ...

In this paper we consider a multiobjective optimization problem, and we prove Mond-Weir duality results under second-and higher-order conditions of the objective and constraint functions.

This study investigates the impact of cross structures on flood occurrences in mountainous rivers. The governing equations open channel flow were formulated based Saint-Venant equations. was segmented, and a node equation established at each section’s connection point. An overflow model bridges weir dams also developed. physical simplified modeled using actual building data calculation requirem...

Orifice-weir structures are being used to reduce peak drainage rates and to store water during the growing season in poorly drained pine plantations. Earlier studies have demonstrated their effectiveness in reducing drainage outflows while conserving water during the growing season. This study reports on criteria and preliminary guidelines for designing such structures. The guidelines were deve...