In this paper, we are concerned with a nondifferentiable multiobjective programming problem with inequality constraints. We introduce four new classes of generalized convex functions by combining the concepts of weak strictly pseudoinvex, strong pseudoinvex, weak quasi invex, weak pseudoinvex and strong quasi invex functions in Aghezzaf and Hachimi [Numer. Funct. Anal. Optim. 22 (2001) 775], d-...

At high water stages, obstacles (submerged and particularly emerged vegetation) in the flood plains of a river contribute to the flow resistance and hamper the conveyance capacity. In particular the elevated vegetated parts are expected to play an important role. The objective of this research work is to determine the form drag due to vegetated oblique weir-like obstacles. Experiments have been...

This study presents new laboratory data on the time-varying scour upstream of a slit weir used for sediment release near hydropower intake. The governing parameters in temporal and spatial hole development under steady unsteady flow conditions were experimentally investigated. includes 40 scenarios at center side weirs uniform non-uniform with median sizes d50 = 0.24, 0.55 mm four different int...

Sedimentation upstream of a weir is common phenomenon, especially for river with high sedimentation. In the long term, this can lead to problems since discharge capacity will decrease due rise riverbed, as experienced in Bekasi Weir, West Java, Indonesia. The accumulated sediments increased up 1.5 m from its original riverbed decade. One easiest ways overcome issue return elevation actual by ma...

An analytical solution is presented for the nonlinear pressure-flow relationship of deformable passive valves, which are formed by bonding a deformable film over etched channels separated by a weir. A fluidic pathway connecting the channels is opened when the upstream pressure creates a tunnel along a predefined narrow strip where the film is not bonded to the weir. When the width of the strip ...

The quality of a watershed can be seen from the discharge river flow. Watershed also sedimentation found in water flows and bodies. Sedimentation is sediment produced by erosion process carried flow deposited place where velocity smaller than settling velocity. This research was conducted intake area Musi Hydroelectric Watershed, Ujan Mas District, Kepahiang Regency, Bengkulu Province August – ...