Irrigation Canal Project : Typical Cross Section

Irrigation Cross Section Explained

In any irrigation project there are three types of cross section depending on which the sections are generated. The three cases depend on whether the formation is much above the ground, partially below the ground or much below the ground. All the three cases are as explained below

Case 1: When the formation is much above the ground. This is also called Banking section.

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Case 2: When the formation is partially below ground. This is also called Partial Cutting section.

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Case 3: When the formation is much below ground. This is also called Deep Cutting section.

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The various portions of the cross sections in each of the above cases are shown below

Bed width: Below shown is the bed width of the canal

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Full supply depth: This is the portion from the bottom of the canal to the water level inside the canal. Below shown is the full supply depth

 

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Free board: Free board is the distance between the full supply depth and the top of the canal

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Side slopes: Below shown is the canal side slope

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Hearting: Hearting is the portion on the sides of the canal and is as shown below

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Canal side slope of hearting: Below shown is the Canal side slope of hearting.

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Outer side slope of hearting: Below shown is the outer side slope of hearting.

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SR side top: This stands for Service Road and is as shown below.

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IP side top: This stands for Inspection Path and is as shown below

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SR side top width of hearting: Below shown is the SR side top width of hearting

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IP side top width of hearting: Below shown is the IP side top width of hearting

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Thickness of lining: Below shown is Thickness of lining.

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Blanket: This is a layer below the CNS layer and is constructed in case of banking sections only and is as shown below

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CNS layer: It is the layer above the blanket and below the canal

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Road thickness in cutting: Below shown is the Road thickness in cutting

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Casing Thickness - inner side: This is the casing in-between the canal sides and the hearting side. Below shown is the Casing Thickness - inner side.

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Casing Thickness - outer side: This is the casing in-between the outer sides of hearting and the outer sides of the canal section. Below shown is the Casing thickness outer side.

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Berm: Berm comes only in a banking section and is as shown below

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