Microsprinkler irrigation: two pitfalls to avoid

10,566 views

Amadou Keita

Published on Apr 23, 2021
About :

Many incorrect installations of irrigation equipment continue to undermine the confidence of development actors who have embarked on irrigation. In many irrigation projects intended to help local populations resolve food insecurity and unemployment in rural areas during the dry season, it was made to believe that only very low pressure (1-2 m of water column was suggested) is needed to operate the water distributors normally. Very often, the operators, having noted the multiple failures in the water distribution, simply abandoned this equipment either during the project or shortly after its end. Huge waste, which has only brought disappointment to the rural populations! Of the three irrigation techniques: gravity, localized irrigation and (micro-)sprinklers, it is the last one that is closest to the natural method of providing water to plants: rain. However, some negligence or poor choice of equipment can compromise its effectiveness. The two main factors of negligence relate to the nominal pressure and the spacing of the sprinklers (deduced from the wetted diameter). Manufacturers of quality equipment always indicate the values ​​of these two quantities with regard to (micro-)sprinkling. Failure to comply with these values ​​leads to installations that do not guarantee either the uniformity of the doses applied or the sufficient supply of water to the plants. Furthermore, many studies show that the distribution technique by "rotation" of a deflector is much more uniform and robust - less sensitive to clogging - than distribution by "spraying". The author of this video has tested these different materials for more than 20 years. Among the most durable, efficient and uniform materials, he recommends without hesitation the "rotator" type microsprinkling (and not the sprayer). To go further, you can obtain our book “Microsprinkling by photovoltaic pumping” available at [email protected].

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