Following are the various types of intake structure

a) Canal Intake

b) Reservoir Intake

c) Lake Intake

d) River Intake

Canal Intake

• As water level in the canal remains more or less constant there is no need of providing pipes at various level.

• A canal intake consist of a pipe placed in a brick masonry chamber constructed partly in the canal bank.

• Opening of structure provided with coarse screen & end of pipe inside the chamber is provided with bell mouth fitted with hemispherical fine screen.

• The outlet pipe carries the water to the other side of canal bank, from where it is taken to treatment plants

Reservoir Intake

• A reservoir is formed by constructing a dam or weir across the river.

• The dam may be an earthen dam, masonry dam or concrete dam.

• Water level in reservoir changes from time to time, intake pipes are provided at different levels.

• Reservoir intake used to draw the water from earthen dam.

• It consists of an intake tower constructed a slope of the dam.

• Screen are provided to intake pipes and are controlled by sluice valve provided to control water flow.

c) Lake Intake

• These intake are constructed in the bed of the lake which consist of a pipe & a bell opening, protected by timber or concrete crib.

• Water flows from the opening and is collected din sump well and then pumped to treatment plants.

• These intakes are cheap in construction.

d) River Intakes

• It is circular masonry tower well of 4 to 7 m diameter.

• It is constructed along the river bank at a place from where water can be drawn in required quantity.

• This intake located at bank of river it is called as share intake.