Civil Engineering ⇒ Topic : Methods of Irrigation
|The irrigation water may be applied to the
crops by three basic methods :-
(a) Surface irrigation : In this method water is supplied on ground surface. There are number of ways for this purpose. They are :
1. Free flooding : In this water is supplied till it fills the field.
2. Border strip method : In this field is divided into strips 10m to 20m vide and 100 m to 300 m long.
3. Basin method : In this one basin or rectangular check is constructed for each tree or plant. This method is useful for irrigating orchards.
4. Furrow irrigation: In this method only half to one fourth of the land is wetted.
(b) Sprinkler irrigation : Where irrigation water is costly, water is supplied in the form of spray through perforated pipes which may be either fixed or revolving.
(c) Sub-surface irrigation : In this water is supplied to sub-surface through pipe system. The purpose is to minimize evaporation losses and to effect maximum economy in water use.
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