Border irrigation is a type of surface irrigation where the field is divided into strips separated by border ridges running down the gradient of the field. The area between the ridges is flooded during irrigation. It can be viewed as an extension of basin irrigation to include long rectangular or contoured field shapes, longitudinal but no lateral slope, and free draining or blocked conditions at the lower end. In contrast to basin irrigation bunds are not to contain the water for ponding but to guide it as it flows down the field.
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