Command Area In irrigation

3 Types of Command Area In Irrigation (Gross Command Area, Culturable Command Area & Net Command Area )

 

The area over which canal irrigation water flows by gravity is known as the command area in irrigation.

 


 

  Types of Command Area in Irrigation  

There are 3 types of command areas which are explained below:

command area in irrigation

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1.  Gross Command Area:  

✔ Gross Command Area is the total area that can be economically irrigated from an irrigation scheme without considering the limitations of water.

✔ It is denoted by GCA.

✔ It includes cultivating land as well as uncultivating lands such as roads, wastelands, forests, barren lands, etc.

GCA = CCA + Uncultivable area

 

2. Culturable Command Area:  

✔ Culturable Command Area is the area in whichcrop is grown at a particular time or crop season.

✔  It is denoted by CCA.

✔ Uncultivable areas are excluded from GCA to obtain CCA. The uncultivable area includes barren lands, forests, etc.

✔ Although CCA excludes uncultivable lands, it includes canal networks & supply ditches as they are used for conveying water to the irrigation field.

CCA=GCA – Uncultivable area

✔ The culturable Command Area can be of two types. They are:

a) Culturable Cultivable Area:

It is the area within the culturable command area where cultivation is actually done at present.

b) Culturable Uncultivable Area:

  It is the area within the culturable command area where the cultivation is possible but not done at present.

 

3. Net Command Area:  

✔ It is the Culturable Command Area obtained after the deduction of canal networks, supply ditches, etc constructed in the field.

✔ It is denoted by NCA.

NCA=CCA – the area occupied by canals, canals network, and ditches.

 

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