Your search found 3 records
1 Piracha, Z. A.; Ghaffar, A.; Gill, M. R.; Arif, M.. 1993. Buried pipeline irrigation system and its impact on farm economy. In Government of Pakistan-USAID Irrigation Systems Management Research Project; IIMI, Proceedings: Irrigation Systems Management Research Symposium, Lahore, 11-13 April 1993. Vol.1. - Integrated watercourse management. pp.19-35.
(Location: IWMI-HQ Call no: IIMI 631.7.8 IIMI Record No: H012881)
As reported by Piracha et al (1990), a buried pipeline irrigation system in two loop configuration was installed to evaluate its performance and farmers' acceptance to convey water, and to evaluate the concept of divided warabandi in uncommanded areas. Each loop of the system serves 240 acres with half discharge of the public tubewell through 6-inch diameter class-B PVC pipe buried 3 feet deep. Water is delivered to the adjacent open channels through locally manufactured alfalfa valves. Only one turnout on each loop is operated at a time, following warabandi schedule. Standpipes at appropriate locations allow release or entry of air and surge protection. The average delivery efficiency of about 99% almost doubles the volume of water available near the lower end of the command areas. About 1% of command area previously occupied by open channels have been made available to the farmers. The increased flow rates and volumes, improved water control, and its immediate availability has been appreciated by the farmers. Until experience was gained in using small streams efficiently, reduced stream size initially was not well taken by the users in upper reaches. Economic analysis shows that improvement increases crop acreage, cropping intensity, irrigation intensity and yield per acre. Incremental benefits were increased after improvement. Benefit-cost analysis conducted for a useful life of 20 to 30 years shows that the system is economically favorable at 12% discount rate. At 15% discount rate, it is positive and probably not a very safe proposition for large scale adoption.
2 Ghaffar, A.; Arif, M.; Gill, M. R.; Sarwar, M. 1993. Bench mark survey of buried pipeline irrigation system at tubewell MN-144. In IIMI; WAPDA, Irrigation Systems Management Research (ISM/R) Project. Integrated watercourse management - II. vi, 37p.
Surveys ; Watercourses ; Tube wells ; Water distribution ; Irrigation systems ; Crop yield ; Agricultural economics ; Land use ; Farming systems / Pakistan
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIM Record No: H013244)
3 Ghaffar, A.; Arif, M.; Gill, M. R. 1993. Agro-economic evaluation of manually installed "on farm tile drainage" In IIMI; WAPDA, Irrigation Systems Management Research (ISM/R) Project. Integrated watercourse management - II. vi, 33p.
Drainage ; Tube wells ; Agricultural economics ; Farming systems ; Soil water relations ; Farm income ; Economic aspects ; Evaluation ; Cost benefit analysis / Pakistan
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIM Record No: H013245)
Powered by DB/Text WebPublisher, from
