How are irrigation canals useful?
Answers
Explanation: Irrigation canals are used to move water from a source, whether a stream, reservoir, or holding tank. The canal may be a few feet wide and less than a foot deep, or very wide, and several feet in depth. flow gates, sluice gates, or valves control the flow of water from the source, to the point of use. When the water reaches the point of use, it may be pumped into the field using drip or spray equipment, or it may be released directly into the field.
In a system that allows gravity flow to introduce the water into the field, the crop rows are hilled, that is, built up higher where the plants are located, and the middles are low. The ground must also be sloped slightly, to allow the water to flow down. This requires pretty careful grading of the field, and is inherently inefficient, since some areas will naturally receive more water than others, and much of the water can be lost to evaporation. In this application, the water seeps into the ground beneath the plants, and capillary action causes it to soak ‘’up’’ the hill into the plant’s roots.
Rice farmers actually use irrigation canals to flood entire fields, and other canals to drain them to allow the field to dry prior to harvest.
Answer:
In some areas irrigation canals are used because farmers cannot go to carry water every time or everyday some they construct canal to take water from there. This is done to make there work easy.
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