Your search found 42 records
1 Allen, R. G.. 1985. Yield - ET function in irrigation system design. 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.390-405.
(Location: IWMI-HQ Call no: 631.7.8 G000 KEY Record No: H02848)
2 Allen, R. G.; Pruitt, W. O. 1986. Rational use of the FAO blaney-criddle formula. Journal of Irrigation and Drainage Engineering, 112(2):139-155.
(Location: IWMI-HQ Call no: P 1881 Record No: H08319)
3 Scaloppi, E. J.; Allen, R. G.. 1993. Hydraulics of irrigation laterals: Comparative analysis. Irrigation and Drainage Engineering, 119(1):91-115.
(Location: IWMI-HQ Call no: PER Record No: H012120)
4 Scaloppi, E. J.; Allen, R. G.. 1993. Hydraulics of center-pivot laterals. Journal of Irrigation and Drainage Engineering, 119(3):554-567.
(Location: IWMI-HQ Call no: PER Record No: H012855)
Analytical equations that characterize hydraulics of center-pivot laterals with and without end-gun sprinklers were developed. The equations include computation of pressure-head distribution; pressure-head loss; and maximum, minimum, and average pressure heads and their corresponding locations of occurrence along a lateral. The proposed equations are important in design and evaluation of center-pivot irrigation systems since critical reference pressure can be easily determined and their corresponding locations can be readily identified in the field. The velocity-head term was included in the complete set of developed equations. A simplified solution that neglects the velocity-head term and uses the Darcy-Weisbach formula for a computing friction loss in a typical center-pivot lateral with an end-gun sprinkler is also included. The results are in good agreement to those computed by a stepwise solution in a variety of test conditions. Discrepancies between results from these methods are within the accuracies of pressure gages normally used in irrigation evaluations. The proposed equations simplify important practical applications, such as system design and evaluation. Besides design, other potential applications of the proposed equations include analysis of energy consumption and uniformity of water application due to hydraulic behavior under different design and operating conditions.
5 Allen, R. G.; Smith, M.; Perrier, A.; Pereira, L. S. 1994. An update for the definition of reference evapotranspiration. ICID Bulletin, 43(2):1-34.
(Location: IWMI-HQ Call no: PER Record No: H016377)
6 Allen, R. G.; Smith, M.; Pereira, L. S.; Perrier, A. 1994. An update for the calculation of reference evapotranspiration. ICID Bulletin, 43(2):35-92.
(Location: IWMI-HQ Call no: PER Record No: H016378)
7 Hill, R. W.; Allen, R. G.. 1995. Developing simple irrigation scheduling calendars. In ICID; FAO, 46th International Executive Council, ICID/FAO Workshop on Irrigation Scheduling: From Theory to Practice, FAO, Rome, Italy, 12-13 September 1995 - Background papers. Rome, Italy: FAO. 11p.
(Location: IWMI-HQ Call no: 631.7.1 G000 ICI Record No: H018145)
8 Allen, R. G.. 1996. Assessing integrity of weather data for reference evapotranspiration estimation. Journal of Irrigation and Drainage Engineering, 122(2):97-106.
(Location: IWMI-HQ Call no: PER Record No: H018278)
9 Hill, R. W.; Allen, R. G.. 1996. Simple irrigation scheduling calendars. Journal of Irrigation and Drainage Engineering, 122(2):107-111.
Irrigation scheduling ; Water management ; Farmer participation ; Crop yield ; Soil water ; Simulation models / Pakistan / USA
(Location: IWMI-HQ Call no: PER Record No: H018279)
Simple calendars are described that express best dates of irrigation based on long-term weather data. The calendars are intended to promote easy and ready adaption of improved water management practices by farmers in both developed and developing countries by presenting simplified, nontechnical scheduling guidance. The calendars are developed using a daily soil-water balance-crop yield model. Once developed, the calendars require no updating and no further input by technical personnel. Calendars are developed for several planting dates, soil types and initial water contents. Developed calendars graphically show recommended irrigation occurrences expressed in days or weeks after sowing that correspond with the type of irrigation water delivery schedule utilized. The calendars are generalized as much as possible to promote widespread public usability. The graphical nature of the calendars encourages use by illiterate or semiliterate farmers. The methodology demonstrated is transferable to any site where sufficient weather data are available.
10 Pereira, L. S.; Perrier, A.; Allen, R. G.; Alves, I. 1996. Evapotranspiration: Review of concepts and future trends. In Camp, C. R.; Sadler, E. J.; Yoder, R. E. (Eds.), Evapotranspiration and irrigation scheduling: Proceedings of the International Conference, November 3-6, 1996, San Antonio Convention Center, San Antonio, Texas. St. Joseph, MI, USA: ASAE. pp.109-115.
(Location: IWMI-HQ Call no: 631.7.1 G000 CAM Record No: H020571)
11 Allen, R. G.; Smith, M.; Pruitt, W. O.; Pereira, L. S. 1996. Modifications to the FAO crop coefficient approach. In Camp, C. R.; Sadler, E. J.; Yoder, R. E. (Eds.), Evapotranspiration and irrigation scheduling: Proceedings of the International Conference, November 3-6, 1996, San Antonio Convention Center, San Antonio, Texas. St. Joseph, MI, USA: ASAE. pp.124-132.
(Location: IWMI-HQ Call no: 631.7.1 G000 CAM Record No: H020573)
12 Ley, T. W.; Allen, R. G.; Hill, R. W. 1996. Weather station siting effects on reference evapotranspiration. In Camp, C. R.; Sadler, E. J.; Yoder, R. E. (Eds.), Evapotranspiration and irrigation scheduling: Proceedings of the International Conference, November 3-6, 1996, San Antonio Convention Center, San Antonio, Texas. St. Joseph, MI, USA: ASAE. pp.727-734.
(Location: IWMI-HQ Call no: 631.7.1 G000 CAM Record No: H020654)
13 Baselga, J. J.; Allen, R. G.. 1996. A Penman-Monteith for a semi-arid climate in South-Western Spain. In Camp, C. R.; Sadler, E. J.; Yoder, R. E. (Eds.), Evapotranspiration and irrigation scheduling: Proceedings of the International Conference, November 3-6, 1996, San Antonio Convention Center, San Antonio, Texas. St. Joseph, MI, USA: ASAE. pp.999-1007.
Evapotranspiration ; Climate ; Soil moisture ; Soil water ; Crop production ; Irrigation scheduling / Spain
(Location: IWMI-HQ Call no: 631.7.1 G000 CAM Record No: H020694)
14 Prajamwong, S.; Merkley, G. P.; Allen, R. G.. 1997. Decision support model for irrigation water management. Journal of Irrigation and Drainage Engineering, 123(2):106-113.
Irrigation management ; Decision support tools ; Simulation models ; Irrigation systems ; Water balance ; Water requirements ; Crop production ; Climate ; Soil water ; Crop yield / USA / Thailand / Utah
(Location: IWMI-HQ Call no: PER Record No: H021089)
15 Hill, R. W.; Allen, R. G.. 1996. Simple irrigation calendars: a foundation for water management. In International Commission on Irrigation and Drainage (ICID); FAO. Irrigation scheduling: from theory to practice. Proceedings of the ICID/FAO Workshop on Irrigation Scheduling, Rome, Italy, 12-13 September 1995. Rome, Italy: FAO. pp.69-74. (FAO Water Reports 8)
Irrigation scheduling ; Water delivery ; Climate ; Crop yield ; Wheat ; Soil water ; Water management ; Computer software ; Computer models ; Soil-water-plant relationships ; Farmers' attitudes ; Information services ; Communication / USA / Pakistan
(Location: IWMI HQ Call no: 631.7.1 G000 FAO Record No: H021320)
16 Jensen, D. T.; Hargreaves, G. H.; Temesgen, B.; Allen, R. G.. 1997. Computation of ETo under nonideal conditions. Journal of Irrigation and Drainage Engineering, 123(5):394-400.
(Location: IWMI-HQ Call no: PER Record No: H021385)
17 Hatfield, J. L.; Allen, R. G.. 1996. Evapotranspiration estimates under deficient water supplies. Journal of Irrigation and Drainage Engineering, 122(5):301-308.
Evapotranspiration ; Water requirements ; Irrigation scheduling ; Models ; Soil water ; Cotton ; Sorghum
(Location: IWMI-HQ Call no: PER Record No: H019237)
18 Willardson, L. S.; Allen, R. G.; Frederiksen, H. D. 1994. Universal fractions and the elimination of irrigation efficiencies. 13th Technical Conference, USCID, Denver, Colorado, USA, 19-22 October 1994. Question 47, Irrigation planning and management measures in harmony with the environment. 15p.
(Location: IWMI-HQ Call no: P 4707 Record No: H022037)
19 Temesgen, B.; Allen, R. G.; Jensen, D. T. 1999. Adjusting temperature parameters to reflect well-watered conditions. Journal of Irrigation and Drainage Engineering, 125(1):26-33.
Evapotranspiration ; Climate ; Databases ; Irrigated farming / USA / Central Washington / California / Davis
(Location: IWMI-HQ Call no: PER Record No: H023777)
20 de Andrade, C. de L. T.; Allen, R. G.. 1999. SPRINKMOD - pressure and discharge simulation model for pressurized irrigation systems: 1. Model development and description. Irrigation Science, 18(3):141-148.
Computer models ; Simulation models ; Flow regulators ; Pipes ; Pumps ; Networks ; Water distribution ; Irrigation systems ; Design ; Computer techniques / USA
(Location: IWMI-HQ Call no: PER Record No: H023782)
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