Your search found 12 records
1 Zerihun, D.. 1992. Design and evaluation of furrow irrigation systems. Siphon, 10:24-32.
(Location: IWMI-HQ Call no: P 3148 Record No: H09957)
2 Zerihun, D.; Feyen, J. 1993. Development of generalized dependent surface irrigation parameters prediction functions for use in design and management. In HR Wallingford. Maintenance and operation of irrigation/drainage schemes for improved performance: papers presented to the Asian Regional Symposium held in Beijing, People's Republic of China, 24-27 May 1993. Wallingford, Oxfordshire, UK: HR Wallingford. pp.3:55-67.
(Location: IWMI HQ Call no: 631.7.1 G570 MAI Record No: H012681)
A review of the major drawbacks of currently available surface irrigation mathematical models has been made and a course of action to alleviate these problems is suggested. The individual elements which constitute a complete set of dependent irrigation parameters in surface irrigation systems design and management have been defined and methodology for the development of explicit prediction functions is proposed. It has been illustrated how knowledge from diverse disciplines, such as modelling of surface irrigation process, dimensional analysis, experimental design and regression analysis, can be pulled together to arrive at a meaningful set of simple design and management equations. The potential use of these equations, which include such areas as optimal system design and automatic feed back control, have also been discussed.
3 Zerihun, D.; Reddy, J. M.; Feyen, J.; Breinburg, G. 1993. Design and management nomograph for furrow irrigation. Irrigation and Drainage Systems, 7(1):29-41.
(Location: IWMI-HQ Call no: PER Record No: H013383)
There exist capabilities for analyzing the behavior of surface flow and the ultimate distribution of infiltrated water in furrow irrigation. The corresponding synthesis, i.e., the selection of appropriate combinations of inflow rates, cutoff times and length of furrow - design and management, currently not so well established, is treated herein. A design-management nomograph is proposed for free draining graded furrows. This is a plot of efficiency, time of cutoff and uniformity coefficient contours each given on a length-flow rate space adjacent to one another, for a furrow with given infiltration characteristics, flow geometry, slope, roughness and required depth of application. The nomograph can be used to determine the combinations of length, time of cutoff and flow rate that would yield in optimum combination of efficiency and uniformity.
4 Zerihun, D.; Feyen, J.; Reddy, J. M. 1996. Sensitivity analysis of furrow-irrigation performance parameters. Journal of Irrigation and Drainage Engineering, 122(1):49-57.
Furrow irrigation ; Sensitivity analysis ; Performance indexes ; Runoff ; Percolation ; Infiltration ; Mathematical models ; Water requirements ; Irrigation efficiency
(Location: IWMI-HQ Call no: PER Record No: H017953)
5 Wang, Z.; Zerihun, D.; Feyen, J. 1996. General irrigation efficiency for field water management. Agricultural Water Management, 30(2):123-132.
(Location: IWMI-HQ Call no: PER Record No: H018562)
6 Zerihun, D.; Feyen, J.; Reddy, J. M. 1997. Empirical functions for dependent furrow irrigation variables: 1. Methodology and equations. Irrigation Science, 17(3):111-120.
Furrow irrigation ; Mathematical models ; Simulation models ; Sensitivity analysis ; Regression analysis ; Irrigation design
(Location: IWMI-HQ Call no: PER Record No: H020489)
7 Zerihun, D.; Wang, Z.; Feyen, J.; Reddy, J. M. 1997. Empirical functions for dependent furrow irrigation variables: 2. Applications. Irrigation Science, 17(3):121-126.
(Location: IWMI-HQ Call no: PER Record No: H020490)
8 Zerihun, D.; Wang, Z.; Rimal, S.; Feyen, J.; Reddy, J. M. 1997. Analysis of surface irrigation performance terms and indices. Agricultural Water Management, 34(1):25-46.
Surface irrigation ; Furrow irrigation ; Basin irrigation ; Irrigation efficiency ; Water loss ; Performance indexes
(Location: IWMI-HQ Call no: PER Record No: H021014)
9 Feyen, J.; Zerihun, D.. 1999. Assessment of the performance of border and furrow irrigation systems and the relationship between performance indicators and system variables. Agricultural Water Management, 40(2/3):353-362.
(Location: IWMI-HQ Call no: PER Record No: H024400)
10 Zerihun, D.; Sanchez, C. A.; Farrell-Poe, K. L. 2001. Analysis and design of furrow irrigation systems. Journal of Irrigation and Drainage Engineering, 127(3):161-169.
(Location: IWMI-HQ Call no: PER Record No: H028289)
11 Zerihun, D.; Furman, A.; Warrick, A. W.; Sanchez, C. A. 2005. Coupled surface-subsurface flow model for improved basin irrigation management. Journal of Irrigation and Drainage Engineering, 131(2):111-128.
(Location: IWMI-HQ Call no: PER Record No: H037965)
12 Warrick, A. W.; Zerihun, D.; Sanchez, C. A.; Furman, A. 2005. Infiltration under variable ponding depths of water. Journal of Irrigation and Drainage Engineering, 131(4):358-363.
(Location: IWMI-HQ Call no: PER Record No: H037984)
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