One of the challenges facing the world today is the control and efficient use of water resources, which both of cases require accurate study and construction associated with it. But due to the high costs that are imposed during the study stages, design and especially execution (Implementation) to the government, the development trend of this important and fundamental infrastructure has been made difficult. So the initial study and finding the economic and most technical method is very important degree, so that today we live in a world that physical and non-physical models are intended as the ultimate decision maker and all the profits and losses of a thought, idea, and structure are put facing us.
Morning glory spillway is one of water conveyance structures from the reservoir to downstream and due to its horny shape has known by this name. Among the strength of morning glory spillway, is the ability to build in narrow valleys and embankment dams which usually has a spillway apart from the body.
In general, morning glory spillway acts in free mode, with radial and axial velocity, so that in this mode the water flow is entered directly into the spillway, but during vortex phenomenon incidence and tangential velocity causes the flow path diversion of the direct mode and travel the longer path flow and so it makes of energy loss and the discharge capacity reduce. Therefore, one of the solutions to prevent this phenomenon is vortex breaker blades installation.
From the obtained results of software outputs analysis and experimental data can be pointed out to the accuracy and validity of the model compared to its similar experimental model. The conducted accuracy and validity of average error percentage of 7.64% was recorded which indicate the almost high accuracy of the model. The analysis relationship and equation presented here considers the various variables influencing the critical submergence of the intake structure. And the functional relationship can be written for
Hc/Di as Hc/Di = 1.686 – 0.001 Re^0.6 + 0.114 Q^2.3