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A barrage is a type of low-head, diversion dam which consists of a number of large gates that can be opened or closed to control the amount of water passing through. This allows the structure to regulate and stabilize river water elevation upstream for use in irrigation and other systems.
A barrage dam is a special kind of dam that consists of a line of large gates that can be opened or closed to control the amount of water passing the dam. The gates are set between flanking piers which are responsible for supporting the water load, and are often used to control and stabilize water flow for irrigation systems.
A dam is a water reservoir in the ground, confined by a barrier, embankment or excavation, on a pastoral property or similar. The term is found widely in South African, Australian [1] and New Zealand English, and several other English dialects, such as that of Yorkshire. [2] The term can be found in the old English folk song Three Jolly Rogues:
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Examples of highly managed reservoirs are Burrendong Dam in Australia and Bala Lake (Llyn Tegid) in North Wales. Bala Lake is a natural lake whose level was raised by a low dam and into which the River Dee flows or discharges depending upon flow conditions, as part of the River Dee regulation system .
The head can only be found by calculation or defined by observations with and without impoundment. Depending on the flow rate and control of the barrage, locks or weir, position will greatly vary and will not necessarily be where the so-called headworks are.
Batujai Dam, Lombok, West Nusa Tenggara; Batutegi Dam, Tanggamus, Lampung; Bili-Bili Dam, Gowa, South Sulawesi; Cacaban Dam, Tegal, Central Java; Cirata Dam ...
Headworks is a civil engineering term for any structure at the head or diversion point of a waterway. It is smaller than a barrage and is used to divert water from a river into a canal or from a large canal into a smaller canal. [1] An example is the Horseshoe Falls at the start of the Llangollen Canal.