geometry of the chute blocks in stilling basins plays a significant role in size and type of these structures. one of the most influencing factors in the design of the blocks is the fluctuating pressure which may cause fatigue on the blocks. despite investigations conducted by many researchers, there is not enough information about the pressure fluctuation around chute blocks in compacted still...

Stilling basins are designed to reduce the high kinetic energy of supercritical flow in a downstream spillway. The USBR II stilling basin is distinguished by chute blocks fixed at upstream end and dented sill end, allowing for effective dissipation excess energy. This research investigates effect chute-block geometry on hydraulic performance basin. Six modified chute-blocks with identical dimen...

Experiments and computations indicate that mixing in chaotic flows generates certain coherent spatial structures. If a two-dimensional basin has a basin cell (a trapping region whose boundary consists of pieces of the stable and unstable manifold of some periodic orbit) then the basin consists of a central body (the basin cell) and a finite number of channels attached to it and the basin bounda...

Solar dimming and wind stilling (slowdown) are two outstanding climate changes occurred in China over the last four decades. The wind stilling may have suppressed the dispersion of aerosols and amplified the impact of aerosol emission on solar dimming. However, there is a lack of long-term aerosol monitoring and associated study in China to confirm this hypothesis. Here, long-term meteorologica...

Sediment buildup at the bottom of a stilling basin can result in premature drainage spillway structures and even lead to dam failure severe cases. Such failures pose ecological human safety hazards downstream areas. To evaluate sudden discharge potential associated with sediment buildup, we developed two-dimensional two-phase flow simulation model built on particle-based force balance equation....

Many of the huge structures like New Esna, and New Nega Hammadi Barrages face a great harmful caused by local scour downstream (DS) their stilling basins. It is planned to redesign many of these structures to minimize these harmful impacts of the DS local scour. This research paper presents the results of an extensive experimental investigation on using an optimized submerged curved deflector t...