Water Reuse in Sequential Basin Irrigation
Publication: Journal of Irrigation and Drainage Engineering
Volume 126, Issue 6
Abstract
Level basins, when properly designed and managed, often attain very high irrigation efficiencies. Problems can arise when the infiltrated depth exceeds the soil water holding capacity or when the crops are sensitive to waterlogging. Both cases could benefit from allowing part of the applied water to run off the basin. This water can be reused for on-farm irrigation of the subsequent basin. Such a setup will be referred to as the “runoff rescue” (RR) system. In this work, an RR system composed of five adjacent terraced basins is described and evaluated. The basins were connected by outflow points located at the upstream and downstream ends of the fields. To provide terms for comparison, the performance resulting from conventional irrigation (without RR) of each basin was estimated using a simulation model. The RR system showed reductions of 14, 16, and 24% in irrigation time, infiltrated depth, and recession time, respectively. The average increments for distribution uniformity and application efficiency were 2 and 9%, respectively.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 126 • Issue 6 • December 2000
Pages: 362 - 370
History
Received: Aug 16, 1999
Published online: Dec 1, 2000
Published in print: Dec 2000
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