Thursday, November 30, 2023

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

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



  Types of Command Areas in Irrigation  

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

command area in irrigation


Read More:     20+ Methods of Irrigation Explained


1. Gross Command Area:  

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

✔ It is denoted by GCA.

✔ It includes cultivating land as well as uncultivated 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 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.




Read More: Furrow Irrigation


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Er. Madhu Krishna Poudel ( Founder )
Er. Madhu Krishna Poudel ( Founder )
Madhu Krishana Poudel is a distinguished Civil Engineer with extensive experience in site supervision, estimation, and AutoCAD 2D and 3D design. Holding a Bachelor's degree in Civil Engineering from Pokhara University, his work and expertise have earned recognition in reputable sources such as USA Today, Time, Wikipedia, and TheRichest, establishing his credibility and trustworthiness in the construction industry.
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