METHODS OF IRRIGATION IN CHINA

• Perennial/gravity method. This method of irrigation involves digging of canals, ditches and channels linking farmland to the water flows naturally into the irrigation area.

• Archimedean screw. Under this method, a metal pipe is fastened on a motor like stand with a perforated coil on top. The spreading of water in the cultivable land is determined
  by the acceleration pressure of the land.
• Overhead lining: a perforated pipe is elevated higher than the basic crop height and well distribution irrigation land. When the water is released, it finds its way into the farmland through the outlets on the raised pipe.
• Flood irrigation. Excess water in the lowlands is trapped or controlled in the farmland and slowly gets absorbed into the ground by filtration.

• Drip irrigation. Under this method of irrigation a variety of distribution pipelines that are evenly spread in the farmland are attached to the main supply pipe that drops water at slow rate. The method is common in green houses.

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