Your search found 4 records
1 Khanjani, M. J.. 1980. Methodology for optimization of an irrigation system with storage reservoirs. xiii, 313p.
Irrigation systems ; Reservoirs ; Optimization ; Cost benefit analysis ; Probability analysis ; Economic analysis ; Computer software ; Water requirements ; Mathematical models ; Water distribution ; Evapotranspiration ; Rehabilitation
(Location: IWMI-HQ Call no: 631.7.1 G000 KHA Record No: H0886)
A procedure was developed to specify optimal plans for an irrigation system with temporary internal storage. The procedure was used to develop plans for 1865 ha using farm service reservoirs. Daily potential and actual evapotranspiration for 25 years were computed. Probability distributions of potential and actual evapotranspiration for 1-30 days duration were estimated. A log-normal probability distribution was found to best fit the data, and probability equations for different durations were computed. These distributions were used to determine possible irrigation intervals for different crops growing in different soil types. Costs of different types of irrigation subsystem components such as canal sections, farm service reservoirs, pumps, and sprinkler and gravity application subsystems were computed. A marginal cost and benefit analysis was used to select the best irrigation intervals for all soil-crop combinations. The time of occurrence of maximum evapotranspiration for each crop was analyzed and found to follow a log-normal distribution. Water-use information was used to compute the volume of interval storage needed within the system. Fifteen farm service reservoirs were located at 15 specified sites by considering physical conditions and other restrictions. Costs and design capacities of farm service reservoirs and canal sections of the system were computed. By utilizing a mixed integer programming model, the locations of farm service reservoirs were optimized; and seven of the original 15 farm service reservoir sites were selected. A linear programming model was then used to compute the optimum capacity of each farm service reservoir, and parametric programming was used to examine the effects of varying water costs of system configuration. The cost and design capacity of the irrigation system with seven farm service reservoirs was computed.
2 Khanjani, M. J.; Busch, J. R. 1982. Optimal irrigation water use from probability and cost-benefit analyses. Transactions of the ASAE, 25(4):961-965.
(Location: IWMI-HQ Call no: P 3098 Record No: H010650)
3 Khanjani, M. J.; Barani, G. A. 1999. Optimum design of border irrigation system. Journal of the American Water Resources Association, 35(4):787-792.
(Location: IWMI-HQ Call no: PER Record No: H025122)
4 Barani, G. A.; Khanjani, M. J.. 2002. A large electronic weighing lysimeter system: Design and installation. Journal of the American Water Resources Association, 38(4):1053-1060.
(Location: IWMI-HQ Call no: PER Record No: H031362)
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