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Types Of Irrigation

Posted on 22nd June 201822nd February 2022 By Malay Sautya

Contents

  • 1 Types Of Irrigation
    • 1.1 (1) Surface irrigation
      • 1.1.1 (i) Flow irrigation
        • 1.1.1.1 (a) Perennial Irrigation
        • 1.1.1.2 (b) Flood Irrigation:
      • 1.1.2 (ii) Lift irrigation
    • 1.2 (2) Sub-surface Irrigation:
      • 1.2.1 (i) Natural sub-irrigation
      • 1.2.2 (ii) Artificial sub-irrigation

Types Of Irrigation

Irrigation is mainly of two types:

  1. Surface irrigation
  2. Subsurface irrigation  
Types Of Irrigation

(1) Surface irrigation

Surface irrigation is defined as the group of water application procedures where water is applied and dispersed over the soil surface either by gravity or by pumping.  

This technique is most appropriate to soils with low to moderate-infiltration capacities to lands with the comparatively uniform landscape (slopes less than 3%). 

In India, More than seventy-five percent (75%) of irrigated lands is supplied water by surface irrigation methods.     Surface irrigation can be further classified into: 

  • (i) Flow irrigation.
  • (ii) Lift irrigation.

(i) Flow irrigation

If the water is available at a higher level, and if it is supplied to a lower level, by the mere action of gravity, then it’s known as Flow Irrigation. Flow irrigation further divided into the following two types:

  • (a) Perennial irrigation
  • (b) Flood irrigation.
(a) Perennial Irrigation

⇛In the perennial system of irrigation, consistent and persistent water supply is assured to the crops as per the requirements of the crop, throughout the crop period.   

⇛In this system of irrigation, water is supplied through canal distribution system taking-off from above a weir or a reservoir.  

⇛When irrigation is done by diverting the river runoff into the main canal by constructing a diversion weir or a barrage across the river, then it is called as direct irrigation. But if a dam is built across a river to store water during monsoons, so as to supply water in the off-taking channel during periods of low flow, then it is termed as storage irrigation.

(b) Flood Irrigation:

⇛In these types of irrigation method, the soil is kept submerged and fully flooded with water, so as to cause thorough saturation of the land.  

⇛It is commonly practiced in delta regions wherever the stream water level during the flood is sufficiently high to provide water to the land by flow, or partly by flow and partly by lift.  

⇛This method of irrigation is also known as uncontrolled irrigation or inundation irrigation.

(ii) Lift irrigation

If the water is lifted up by some mechanical or manual means, such as by pumps, etc. and then supplied for irrigation; then it’s known as Lift irrigation. Utilization of wells and tube wells for providing irrigation waterfall under this category.

(2) Sub-surface Irrigation:

In this kind of irrigation system, water does not actually wet the soil surface rather it flows underground and nourishes the plant roots by capillarity. Sub-Surface irrigation can be further classified into:

  • (i) Natural sub-irrigation
  • (ii) Artificial sub-irrigation.

(i) Natural sub-irrigation

⇛ Leakage water from channels is going underground and all through passage via the sub-soil, it can irrigate crops, sown on lower lands, via capillarity. Sometimes leakage causes the water table to rise up, which facilitates in irrigation of crops by capillarity.   

⇛ When underground irrigation is achieved, absolutely via natural processes without any additional more efforts, it is referred to as natural sub-irrigation.

(ii) Artificial sub-irrigation

⇛ When a system of open jointed drains are artificially laid below the soil, so as to supply water to the crops with the aid of capillarity, then it is known as artificial sub-irrigation. It is a very costly method and for this reason, followed on a totally small scale.   

⇛ This method may be adopted only in some special cases with favourable soil conditions and for cash crops of very excessive return.

Read Also:

Advantages And Disadvantages of Irrigation

ILL-EFFECTS OF IRRIGATION

5 Way To Improve Soil Fertility

Irrigation Engineering

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