De Vries, Tonny T. and Anwar, Arif A. (2006) Irrigation scheduling with travel times. Journal of Irrigation and Drainage Engineering, ASCE, 132 (3), 220-227. (doi:10.1061/(ASCE)0733-9437(2006)132:3(220)).
Abstract
In preparing water allocation schedules for fields in a lateral unit, the time required for water to travel from one point to a lateral to another is significant and dependent on the sequence in which users abstract water. In this paper illustrates the problem of ignoring travel time and/or considering travel time to be sequence independent. For two users each requesting water for a duration of 4 hours, by assuming travel time to be sequence independent, one user receives water for 5 hours 25% increase and the other receives water for only 3 hours 25% decrease. This paper presents a formulation of the irrigation scheduling problem for sequential users with sequent dependent travel time. The formulation is implemented as an integer programme and applied to a part of a lateral unit on the Juan Distributary, Haryana, India. Two models are presented, the first allows for non-contiguous jobs i.e. idle time is permitted between jobs. The second model does not permit non-contiguous jobs.
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