In order to elevate the level of water on the upstream side and to allow the extra water to flow over its whole length to the downstream side, a concrete or masonry construction over a river (or stream) is known as a "WEIR." The rate of water flow in rivers and streams can also be determined using weirs. Sharp-crested, broad-casted, and ogee shaped "WEIRS" are some of the more popular shapes.  A centrifugal pump in the device draws water from the sump tank and pumps it into a narrow flow channel. The weir is installed at the channel's end. The weirs can all be used interchangeably. The collector receives the water that flows over the weir. For flow measurement, water arriving from the collector can either be sent to the sump or the measuring tank.

Experimental objectives

To determine the value of the discharge coefficient for both notches.

Specifications

• The unit is provided with following weirs:
  (a) Sharp-crested weir.
  (b) Broad-crested weir.
  (c) Ogee shaped weir
• Pump 1/2 H.P. monoblock.
• Flow measurement – Measuring tank calibrated water flow meter is used.
   
  A technical manual accompanies the unit.

Required Other Items but not Included with above supply

• Floor surface – 2.5 m x 1.5 m.
• 230 v, 5 amp supply with earthing connection