Your search found 6 records
1 Renfro, R. Z. H.; Niazi, M. I. A.; Ghaffar, A.. 1979. Constraints of small farmers in the precision land levelling program in the Pakistan Punjab. Fort Collins, CO, USA: Colorado State University. x, 117p. (Water management technical report no.54)
(Location: IWMI-HQ Call no: 631.7.6.2 G730 REN Record No: H0338)
2 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.
3 Piracha, Z. A.; Ghaffar, A.; Gill, M. R. 1993. Manually installed tile drainage system: Its effect and economics. 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.83-98.
(Location: IWMI-HQ Call no: IIMI 631.7.8 IIMI Record No: H012885)
As reported by Ahmad et al.(1990) a tile drainage was installed in an area of about 11 acres which went out of cultivation due to water logging and soil salinization. The objective of the installation was to study the feasibility of manually placed tile drainage systems at farm level to control watertable at a level where crops are able to effectively use water from the watertable and to reuse drainage flow for crop production. The hydraulic performance of the system was evaluated by using Hooghoudt's equation. The average "q/k" ratio determined as 0.0122 matched with the design ratio of 0.012. This shows the similarity between observed and predicted watertable depths. The quality of drainage water has also improved considerably. The system has effectively controlled the watertable at the desired depth and farmers are cultivating the previously abandoned area successfully. The system has also controlled soil salinity, increased land value and land productivity. Analysis indicates that estimated benefits from this system are lower than project costs. However, the project is economically feasible if surplus water from drainage system could be used to irrigate extra acreage instead of diverting it down a drain.
4 Ghaffar, A.; Gill, M. R. 1993. Impact of buried pipeline irrigation system on the farm economy at tubewell MN-144. In IIMI; WAPDA, Irrigation Systems Management Research (ISM/R) Project. Integrated watercourse management - II. vi, 24p.
Pipes ; Flow channels ; Economic aspects ; Tube wells ; Watercourses ; Agricultural economics ; Cost benefit analysis ; Research / Pakistan
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIM Record No: H013243)
5 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)
6 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)
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