The spatial distribution of irrigation water and yields on the Gal Oya left bank [Sri Lanka]
1982
Svendson, M. (Cornell Univ., Ithaca (USA)) | Wijeratne, C.M. (Agrarian Research and Training Inst., Colombo (Sri Lanka))
Water is not uniformly distributed in the Gal Oya left bank system. While head end areas have plenty of water, water availability drops drastically towards the tail end of the system. Some tail areas are effectively rainfed. Data collected over three seasons show a high correlation between paddy yields and water availability and that most of the variations in yields can be accounted for by water alone. D channel location is the most significant determinant of water availability. In areas of scarce water, farm location along the D channel is also significant but location along the field channel appears insignificant
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