The Piano Key weir (PKW) is a hydraulically attractive alternative to linear overflow weirs, increasing the unit discharge for similar heads and spillway widths. This advantage allows operating dam reservoirs on an increased level and provides thereby an enhanced retention volume. It is a result of the non-linear nature of PKWs being folded back and forth to make repeating cycles or keys. As PK...

In this research, the numerical method of computational fluid dynamics and dimensionless parameter of Froude number have been applied to determine the flow regime over ogee spillways.Froude number is a dimensionless dynamic parameter calculated using the square root of the ratio of inertia force and gravitational force. Considering that the study of the regimes of flow over hydraulic structures...

Changes in flood loads and reservoir levels, produced by climate change (CC), represent an increasing concern for dam safety managers downstream populations, highlighting the need to define adaptation strategies based on failure risk management framework. Currently, thousands of dams worldwide, varying use, age, maintenance, may a threat cities case structural failure. Several studies relate se...

Diyala Governorate was exposed recently to high flood waves discharged from Hemrin Dam River when the dam reached its full capacity. The recorded discharge capacity of reduced just 750m3/s. This exposes cities and villages along risk discharging waves, which may reach 3000 m3/s. It is important manage, suggest, design escapes away River. escape branches Lake towards Ashweicha Marsh. One dimensi...