Following are the various types of intake structure
a) Canal Intake
b) Reservoir Intake
c) Lake Intake
d) River 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
• 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.