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D. Zerihun
Katholieke Universiteit Leuven
Systems designHydrologySurface irrigationAgricultural engineeringIrrigation
9Publications
4H-index
94Citations
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Publications 9
Newest
#1Jan Feyen (Katholieke Universiteit Leuven)H-Index: 49
#2D. Zerihun (Katholieke Universiteit Leuven)H-Index: 4
Performance terms measure how close an irrigation event is to an ideal one. For border and furrow irrigation to facilitate quantification of the performance terms use was made of the software tools BORDEV and FURDEV. Once determined, the values of the performance indices were plotted as a function of the system variables. In conclusion, it can be stated that the relationship between the performance indices and the system variable contains valuable information for the system design and management...
8 CitationsSource
#1D. ZerihunH-Index: 4
#2Jan FeyenH-Index: 49
Last. Zhi WangH-Index: 18
view all 4 authors...
The furrow irrigation system design problem is cast in an optimization setting. A structured problem formulation and a pre-solution analysis procedure is presented. The application of the proposed approach in the detection and removal of constraint redundancy and inconsistency, as well as complications related to scale problems is demonstrated. Key solution features, such as solution existence and (non)uniqueness, constraint activity at the optimum, as well as properties of monotonocity of the f...
4 CitationsSource
#1D. Zerihun (Katholieke Universiteit Leuven)H-Index: 4
#2Zhi Wang (Katholieke Universiteit Leuven)H-Index: 18
Last. J Mohanreddy (UW: University of Wyoming)H-Index: 9
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Abstract Performance terms measure how close an irrigation event is to an ideal one. An ideal or a reference irrigation is one that can apply the right amount of water over the entire region of interest (subject region) without loss. The key phrase, used in the description of a reference irrigation, has been used as the criterion for identifying the performance terms that constitute a complete set, corresponding to any given irrigation regime. Indices have been defined to quantify the performanc...
16 CitationsSource
#1D. Zerihun (Katholieke Universiteit Leuven)H-Index: 4
#2Zhi Wang (Katholieke Universiteit Leuven)H-Index: 18
Last. J Mohanreddy (UW: University of Wyoming)H-Index: 9
view all 4 authors...
A complete set of dependent furrow irrigation variables has been identified, for which empirical functions, of general applicability, have been developed. A one-dimensional sensitivity analysis technique coupled with dimensional analysis was employed to reduce the number of independent irrigation variables to a manageable size. Simulation experiments were carried out to generate the data used in developing the pertinent functional relationships. Regression analysis was used to ascertain the spec...
3 CitationsSource
#1Zhi Wang (Katholieke Universiteit Leuven)H-Index: 18
#2D. Zerihun (Katholieke Universiteit Leuven)H-Index: 4
Last. Jan Feyen (Katholieke Universiteit Leuven)H-Index: 49
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Abstract On-farm water management systems are traditionally evaluated using a set of performance indices which are inconvenient for evaluation and comparison. We propose a general efficiency ( E g ) which is defined as the ratio of crop transpiration to the sum of the volume of applied water and the volume of deficit. E g combines the characteristics of traditionally used irrigation efficiencies: application efficiency ( E a ), storage efficiency ( E s ) and the Christiansen's coefficient of uni...
19 CitationsSource
Knowledge of the sensitivity of performance and other related dependent furrow-irrigation parameters, in quantitative terms, to variations in field, design, and management variables can help save a considerable amount of cost, time, and effort spent in field data collection. A univariate analysis, based on the concept of relative sensitivity, was used to quantify the sensitivity of seven dependent irrigation parameters (\IE\N\Da\N, \IE\N\Dr\N, \IR\N\Dr\N, \ID\N\Dr\N, \IU\N\Dco\N, l\Idr\N, and \I...
37 CitationsSource
#1D. ZerihunH-Index: 4
#2J. Mohan ReddyH-Index: 9
Last. Jan FeyenH-Index: 49
view all 3 authors...
#1D. ZerihunH-Index: 4
#2Zhi WangH-Index: 18
view all 4 authors...
#1D. Zerihun (Katholieke Universiteit Leuven)H-Index: 4
#2J Mohanreddy (UW: University of Wyoming)H-Index: 9
Last. G. Breinburg (Katholieke Universiteit Leuven)H-Index: 1
view all 4 authors...
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 cont...
3 CitationsSource
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