Your search found 12 records
1 Yitayew, M.; Reynolds, C. A.; Sheta, A. E. 1995. Bubbler irrigation system design and management. In Lamm, F. R. (Ed.), Microirrigation for a changing world: Conserving resources/preserving the environment: Proceedings of the Fifth International Microirrigation Congress, Hyatt Regency Orlando, Orlando, Florida, April 2-6, 1995. St. Joseph, MI, USA: ASAE. pp.402-413.
(Location: IWMI-HQ Call no: 631.7 G000 LAM Record No: H018879)
2 Warrick, A. W.; Yitayew, M.. 1987. An analytical solution for flow in a manifold. Advances in Water Resources, 10(2):58-63.
(Location: IWMI-HQ Call no: PER Record No: H02899)
3 Warrick, A. W.; Yitayew, M.. 1988. Trickle lateral hydraulics. I - Analytical solution; II Design and examples. Journal of Irrigation and Drainage Engineering, 114(2):281-288; 289-300.
(Location: IWMI-HQ Call no: PER Record No: H04397)
4 Samani, Z. A.; Yitayew, M.. 1989. Changes in soil properties under intermittent water application. Irrigation Science, 10:177-182.
(Location: IWMI-HQ Call no: PER Record No: H05688)
5 Tecle, A.; Yitayew, M.. 1990. Preference ranking of alternative irrigation technologies via a multicriterion decision-making procedure. Transactions of the ASAE, 33(5):1509-1517.
(Location: IWMI-HQ Call no: P 1998 Record No: H08705)
6 Warrick, A. W.; Yitayew, M.. 1992. Irrigation uniformity relationships for irrigation system management. Journal of Irrigation and Drainage Engineering, 118(6):1007-1008.
(Location: IWMI-HQ Call no: PER Record No: H011715)
7 Yitayew, M.; Hart, W. E. 1986. Water duty: Basis for water allocation. In ASAE, Water resources law: Proceedings of the National Symposium on Water Resources law, Hyatt Regency, Chicago, Illinois, 15-16 December 1986. St. Joseph, MI, USA: ASAE. pp.35-49.
Water rates ; Water allocation ; Water conservation ; Irrigation water ; Evapotranspiration ; Leaching ; Precipitation ; Case studies / USA / California / Arizona
(Location: IWMI-HQ Call no: 333.91 G430 ASA Record No: H017410)
8 Reynolds, C.; Yitayew, M.; Petersen, M. 1995. Low-head bubbler irrigation systems. Part I: Design. Agricultural Water Management, 29(1):1-24.
Irrigation design ; Gravity flow ; Irrigation systems ; Small scale systems ; Hydraulics ; Mathematical models
(Location: IWMI-HQ Call no: PER Record No: H017779)
Low-head bubbler systems differ from other micro-irrigation systems because they are based on gravity-flow, can operate at pressure as low as 1 m (3.3 ft) and do not require elaborate filtration systems. Despite their simplicity and advantages, low-head bubbler systems lack a well-defined design procedure to facilitate design and installation. A comprehensive design procedure for flow-head bubbler systems is presented and an example gradual slope design is given in detail. The design procedure utilizes head loss gradient charts based on the Darcy-Weisbach equation and the delivery hose elevations are calculated from the energy equation.
9 Reynolds, C.; Yitayew, M.. 1995. Low-head bubbler irrigation systems. Part II: Air lock problems. Agricultural Water Management, 29(1):25-35.
Irrigation design ; Gravity flow ; Irrigation systems ; Small scale systems ; Water distribution ; Hydraulics ; Velocity
(Location: IWMI-HQ Call no: PER Record No: H017780)
Air locks may occur in pipelines of low-pressure, gravity-flow bubbler irrigation systems located on level fields and with design heads as low as one meter (3.3 ft). Air locks in bubbler systems can partially or entirely block the flow of water, and thereby significantly decrease the uniformity of water application. To develop design criteria to prevent air locks from occurring in the delivery hoses, hydraulic laboratory experiments were conducted in the laboratory for smooth plastic hoses with internal diameters of 6, 8, 10, and 13 mm (1/4, 5/16, 3/8, and 1/2 in). Hose diameters less than 6 mm (1/4 in) and greater than 10 mm (3/8 in) are recommended for low- head bubbler systems due to excessive friction losses and poor water distribution uniformity, respectively. For bubbler systems with design heads less than 2 meters (6.6 ft), the 10 mm (3/8 in) diameter hose is recommended with design flows and velocities greater than 1.7 1/min (0.42 US gal/min) and 0.37 m/s (1.2 ft s), respectively. For systems with design head greater than 2 meters (6.6 ft), the 6 mm (1/4 in) diameter hose is recommended with design flows and velocities greater than 0.5 1/min (0.15 US gal/min) and 0.29 m/s (1.0 ft s) respectively.
10 Yitayew, M.; Khan, A. A. 1995. Field evaluation of water and solute movement from a point source. In Lamm, F. R. (Ed.), Microirrigation for a changing world: Conserving resources/preserving the environment: Proceedings of the Fifth International Microirrigation Congress, Hyatt Regency Orlando, Orlando, Florida, April 2-6, 1995. St. Joseph, MI, USA: ASAE. pp.609-614.
(Location: IWMI-HQ Call no: 631.7 G000 LAM Record No: H018913)
11 Yitayew, M.; Melesse, A. M. 2011. Critical water resources issues in the Nile River Basin. In Melesse, A. M. (Ed.). Nile River Basin: hydrology, climate and water use. Dordrecht, Netherlands: Springer. pp.401-416.
Water management ; River basins ; Geography ; Climate change ; Lakes ; Hydrology ; Hydroclimatology ; Political aspects / Africa / Ethiopia / Nile River Basin
(Location: IWMI HQ Call no: 551.483 G136 MEL Record No: H044040)
12 Yitayew, M.. 2008. Critical water resources management issues in the Nile River Basin. In Abtew, W.; Melesse, A. M. (Eds.). Proceedings of the Workshop on Hydrology and Ecology of the Nile River Basin under Extreme Conditions, Addis Ababa, Ethiopia, 16-19 June 2008. Sandy, UT, USA: Aardvark Global Publishing. pp.295-309.
Water management ; Water resources ; River basins ; Hydroclimatology ; Political aspects ; Climate change / Ethiopia / Nile River Basin
(Location: IWMI HQ Call no: 551.48 G136 ABT Record No: H044331)
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