Your search found 188 records
1 Reddy, J. M.; Clyma, W. 1984. Irrigation system improvement by simulation and optimization. Cairo, Egypt: Egypt Water Use and Management Project. 2 vols.; iv, 26p.; v, 35p. (EWUP technical report no.16; no.16B)
Simulation ; Optimization ; Mathematical models ; Canal linings ; Irrigation efficiency ; Benefits ; Water conveyance / Pakistan
(Location: IWMI-HQ Call no: 631.7.1 G730 RED Record No: H0159)
Vol. 1 - Theory. A theory for simulation and optimization of an irrigation system to evaluate improvement alternatives was presented. The mathematical simulation model of an irrigation system was developed combining existing models of conveyance, application and water use subsystems. The performance of the subsystem simulation models was verified using available field data from Pakistan. A methodology for the optimal design of a level basin irrigation system was described. Irrigation system improvement alternatives such as canal lining, earthen improvement of the application system were evaluated. Vol. 2 - Application. Wheat production on a watercourse in Pakistan was analyzed. Models for water conveyance, application, and water use subsystems were calibrated with data from the study area. The existing irrigation system operated at a 39 percent application efficiency and 53 percent conveyance efficiency. Optimal design of the application system with precision land leveling provided net benefits of 3625 rupees (Rs) compared to Rs 2612 under traditional field conditions. Canal lining was not economical. Earthen improvement of the conveyance system was beneficial to the farmer with a net profit of Rs 3304. Combined improvement of the application and conveyance systems almost doubled the total net benefits over the traditional system, but with an increased level of investment. The increase in benefits was mostly a result of the increased irrigated area that could be irrigated after the improvements. The benefit/cost ratio of each improvement alternative was different. The difference in benefits between improving the conveyance system and the application system was small, but there was a significant difference in net benefits between any single improvement and the combined improvement of the application and conveyance systems.
2 Biswas, M. R.; Mandal, M. A. S. (Eds.) 1982. On-farm irrigation water management problems. Mymensingh, Bangladesh: Bureau of Socioeconomic Research Training, Bangladesh Agricultural University. xvi, 144 p.
Farming ; Irrigation programs ; Water loss ; Cost benefit analysis ; Rice ; Cropping systems ; Soil texture ; Water conveyance ; Farmers' attitudes ; On farm research / Bangladesh
(Location: IWMI-HQ Call no: 631.7.6.2 G584 BIS Record No: H0244)
3 Trout, T.; Kemper, W. D.; Hasan, H. S. 1982. Circular concrete irrigation turnout. Fort Collins, CO, USA: Colorado State University. 69 p. (Water management synthesis project handbook no. 1 / Design and construction handbook no. 1)
(Location: IWMI-HQ Call no: 631.7.1 G730 TRO Record No: H0475)
4 Trout, T. J. 1979. Factors affecting losses from Indus basin Irrigation channels. Fort Collins, CO, USA: Colorado State University. xxi, 201 p. (Water management technical report no. 50)
Flumes ; Flow ; Watercourses ; Design ; Water loss ; Water conveyance ; Tertiary level irrigation / Pakistan
(Location: IWMI-HQ Call no: 631.7.1 G730 TRO Record No: H0330)
Tertiary irrigation conveyance systems (watercourses) in the Indus Basin lose 30 to 50 percent of their flow. Watercourse systems were studied in depth by ponding and inflow-outflow methods to determine functional relationships between several measurable parameters and the loss rates. The objective was to determine simple design changes that are low cost and can lead to increased conveyance efficiencies in the eastern channels. Statistical analysis of the collected data indicated that: 1. Watercourse loss rates (lps/100m) increase with, but slightly less than proportional to, the usual flow rate in the channel; 2. Loss rates are lower in more often used channels; 3. Loss rates are higher in elevated channels; 4. Loss rates are very sensitive to changes in flow depths, and thus increase with upward fluctuations in flow rates or roughness coefficients; and 5. Intake rates into upper bank soils are very high and are apparently caused by extensive rodent and insect burrows inside the banks.
5 Corey, G. L.; Clyma, W. 1975. Improving farm water management in Pakistan. Fort Collins, CO, USA: Colorado State University. iv, 32p. (Water management technical report no. 37 / Pakistan field report no.1)
On farm research ; Water management ; Water conveyance ; Irrigation scheduling ; Evaluation ; Irrigated farming / Pakistan
(Location: IWMI-HQ Call no: 631.7.6.2 G730 COR Record No: H0333)
6 Trout, T. J. 1982. Diagnostic problems with irrigation conveyance channels. Fort Collins, CO, USA: Colorado State University. ii, 84 p. (Videotape guide no. 1)
(Location: IWMI-HQ Call no: 631.7.6.2 G730 TRO Record No: H0353)
7 Westfall, D. G. 1980. Training manual for agricultural water management specialists. Fort Collins, CO, USA: Colorado State University. xiv, 670 p. (Water management technical report no. 60)
Training ; On farm research ; Water management ; Rural sociology ; Research ; Canals ; Watercourses ; Water loss ; Water conveyance / Pakistan
(Location: IWMI-HQ Call no: 631.7.6.2 G730 WES Record No: H0329)
8 ICID. 1978. Special session on mass transfer of water over long distances for regional development and its effects on the human environment, Athens, 1978: Proceedings. New Delhi, India: ICID. 285p.
Financing ; Environmental effects ; Water conveyance ; Reservoirs ; Economic evaluation ; Simulation
(Location: IWMI-HQ Call no: ICID 631.7 G000 ICI Record No: H0704)
9 Richardson, E. V.; Quenemoen, M. E.; Horsey, H. R. 1985. Egypt water use and management project: Final administrative report. Tucson, AZ, USA: Consortium for International Development. ix, 99 p.
(Location: IWMI-HQ Call no: 631.7 G232 RIC Record No: H0680)
10 Johnson, S. H. III. 1986. Economic, social and technical considerations determining investments in groundwater in Bangladesh. In International Water Resources Association, Water resources for rural areas and their communities: Proceedings of the 5th World Congress on Water Resources, 9-15 June 1985, Brussels, Belgium. Brussels, Belgium: IWRA. pp.893-902.
Investment policy ; Groundwater ; Deep tube wells ; Shallow tube wells ; Water conveyance ; Water loss ; Water user associations ; Economic analysis / Bangladesh
(Location: IWMI-India Call no: 631.7.8 G584 JOH Record No: H0812)
With a total land area the size of the state of Illinois and a population exceeding 90 million, Bangladesh has one of the highest man-land ratios in the world. Blessed with vast river systems but having such a flat topography that large-scale reservoir and gravity surface irrigation systems are not feasible, Bangladesh has been forced to turn to groundwater as a source for dry season irrigation water. Initial investments were in low-lift pumps but now the Government of Bangladesh (GOB) is encouraging investment in hand pumps, shallow tubewells and deep tubewells as sources for additional water for irrigation. However, to date utilization rates have been far below those predicted by national planners. The purpose of this paper is to analyze the economics of alternative groundwater extraction devices in Bangladesh and to use their results to explain present low utilization rates. Using recent data, the analysis examines economic, social and technical characteristics of the alternative technologies and explains why shallow tubewells are to be encouraged over deep tubewells. Based on these results, suggestions for improving utilization rates are presented.
11 Ahammed, C. S. 1984. Bogra underground asbestos cement pipe system: An economic analysis. Dhaka, Bangladesh: BARC. In Bangladesh Agricultural Research Council, Improved distribution system for minor irrigation in Bangladesh: Proceedings of a workshop, Dhaka, 8-9 July 1984 (pp. 25-45). Dhaka: BARC.
Economic analysis ; Concrete pipes ; Agricultural production ; Groundwater ; Irrigated farming ; Water conveyance / Bangladesh
(Location: IWMI-HQ Call no: 631.7.1 G584 BAN Record No: H01457)
12 Lowdermilk, M. K.; Freeman, D. M.; Early, A. C. 1977. Social and organizational factors for farm irrigation improvements: A case study. Paper presented at International Conference on Transfer of Water Resources Knowledge, 2nd, Fort Collins, Colorado, USA, 29 June - 2 July 1977. 21p.
Technology transfer ; Farmers' associations ; Social aspects ; Water conveyance ; Farmer participation / Pakistan
(Location: IWMI-HQ Call no: P 380 Record No: H01757)
Farmers and their local organizations are not only the end receivers in the technology transfer process but are also means of effective horizontal transfer of technologies to other farmers. Farmer organizations are a requisite for the maintenance of many improved technologies which require collective action. The Pakistan case study describes the importance of this concept and the need for irrigation specialists to understand and utilize local farm organizations for water management improvement programs. The unique research-development process developed by Colorado State University in Pakistan has built- in mechanisms for the transfer and maintenance of technologies.
13 Keyes, C. G. Jr; Ward, T. J. (Eds.) 1985. Development and management aspects of irrigation and drainage systems: Proceedings of the Speciality Conference, San Antonio, Texas, 17-19 July 1985. New York, NY, USA: ASCE. x, 508p.
Irrigation management ; Water conveyance ; Drainage ; Research ; Water loss ; Water rights ; Surface water ; Water quality ; Groundwater management ; Water requirements
(Location: IWMI-HQ Call no: 631.7.8 G000 KEY Record No: H02811)
14 Rijo, M.; Pereira, L. S. 1987. Measuring conveyance efficiencies to improve irrigation water management. Irrigation and Drainage Systems, 1(3):267-276.
(Location: IWMI-HQ Call no: PER Record No: H02912)
15 Pahl, R. A.; Hasfurther, R. V. 1985. Conveyance losses due to reservoir releases. In Keyes, C. G. Jr., Ward, T. J., Development and management aspects of irrigation and drainage systems: Proceedings of the speciality conference, San Antonio, Texas. New York, NY, USA: ASCE. pp.84-92.
(Location: IWMI-HQ Call no: 631.7.8 G000 KEY Record No: H02837)
16 Srivastava, R. C.; Wasnik, P. G. 1997. Development of design of LDPE film lined tank and conveyance channel. In Water Technology Centre for Eastern Region, WTCER annual report 1996 - 97. Bhubaneswar, India: WTCER. pp.45-71.
Water conveyance ; Open channels ; Tanks ; Crops ; Rotation ; Runoff ; Recycling ; Design ; Rice ; Models ; Water balance / India
(Location: IWMI-HQ Call no: 631.7.1 G635 WAT Record No: H022002)
17 Kruse, E. G.; Humphreys, A. S.; Pope, E. J. 1983. Farm water distribution systems. In Jensen, M. E. (Ed.), Design and operation of farm irrigation systems. St. Joseph, MI, USA: ASAE. pp.395-443. (ASAE monograph no.3)
Water distribution ; Flow discharge ; Construction technology ; Concrete pipes ; Canal linings ; Farms ; Water conveyance
(Location: IWMI-HQ Call no: 631.7.1 G000 JEN Record No: H03206)
18 Junna, M. R. 1980. Irrigation system improvement by simulation and optimization. Ann Arbor, MI, USA: UMI. xxi, 137p.
Irrigation systems ; Development ; Water delivery ; Water use ; Simulation models ; Mathematical models ; Optimization methods ; Water conveyance ; Canals ; Surface irrigation ; Irrigation design ; Border irrigation
(Location: IWMI-HQ Call no: 631.7.1 G000 JUN Record No: H03243)
Dissertation submitted in partial fulfillment of the requirements for the Degree of Doctor of Philosophy, Colorado State University, Fort Collins, Colorado, December 1980
19 Pereira, L. S. 1988. Modernization of irrigation systems: A case of research, oriented to improve management. Irrigation and Drainage Systems, 2(1):63-77.
Irrigation programs ; Rehabilitation ; Research ; Irrigation management ; Irrigation design ; Models ; Irrigation efficiency ; Water conveyance ; Maintenance ; Farmer participation
(Location: IWMI-HQ Call no: PER Record No: H03273)
20 Early, A. C. 1980. Irrigated crop production in Pakistan: Problems and prospects for the Indus food machine. IRRI Thursday seminar, 28 February 1980. 80p.
Irrigated farming ; Crop production ; Irrigation efficiency ; Water conveyance ; Food production / Pakistan
(Location: IWMI-HQ Call no: P 215 Record No: H02675)
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