Author(s)

W.E. Elshorbagy

Abstract

Water consumption by crops can drop below the potential values under conditions of limited irrigation water supply. The deficit in irrigation supply can be reduced by official reuse of drainage water when mixed with irrigation water at specific known locations. If the amount of this reused water does not meet the deficit, farmers tend to use low quality water from randomly selected points at the nearby drains, unofficially. The amount of drainage water recirculated is unknown and sometimes represents a significant component of the global water balance of the area. A procedure to approximate the amount of recirculated drainage water has been proposed, so that the water balance can be adjusted accordingly. This enables t

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