Side weirs are used in open channels to control flood and the flow passing through it. Discharge capacity is one of the crucial hydraulic parameters of side weirs. The aim of this study is to determine the effect of the intended dimensionless parameters on predicting the discharge coefficient of triangular labyrinth side weir. MAPE, RMSE, and R2 statistic indexes have been used to assess the ac...

Abstract Labyrinth weirs are commonly used to increase the capacity of existing spillways and provide more efficient for new dams due their high specific discharge compared linear weir. In present study, an experimental numerical investigation was conducted improve rectangular labyrinth weir performance. this context, four configurations were tested evaluate influence entrance shape alveoli wid...

The piano key (PK) weir has advanced over the labyrinth to increase discharge capacity. Piano weirs exhibit nonlinear flow behavior and are easy place on existing spillway or newly constructed dam with less base area. Various investigators given equations calculate coefficient for free submerged conditions. study focuses reviewing impacts of PK geometry coefficient, including length height, ups...

Nonlinear weirs are among the major structures used in water transfer. Thus, these have been subject of various studies. This study investigates effect flow splitters on discharge performance trapezoidal and triangular labyrinth one cycle. delves into effects installed crest one-cycle using numerical methods (Flow-3D) physical models. In model, two, four, or six vanes were placed at regular int...

Free crest spillways are hydraulically efficient and safe in operation. Since their discharge capacity is directly proportional to the crest length several types have been developed with the purpose to increase the length of the latter. Among these types traditional labyrinth weir spillways have been studied and used for a long time. Their hydraulic performance and the effect of the involved ge...

Abstract Climate change has caused the inefficient operation of a significant number old weirs to pass large discharges. Therefore, this study aims increase discharge capacity labyrinth weir. A new approach was proposed by modifying weir structure. The data obtained from quarter-round crest and different sidewall angles ranging 8 35°. conventional used for comparison. results showed that percen...

Long crested weirs are gaining popularity amongst the hydraulic engineers owing to obvious hydraulic advantage of flow magnification. These weirs can pass much higher floods from the available width of a natural water course. Such weirs may also be introduced in water treatment plants for mixing of chemicals. This paper discusses the advantages of long crested weirs, such as duckbill and labyri...