An Investigation Of Furrow Advance Rates Under Surge Flow Irrigation
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An Investigation Of Furrow Advance Rates Under Surge Flow Irrigation
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Author : Douglas James Hunsaker
language : en
Publisher:
Release Date : 1984
An Investigation Of Furrow Advance Rates Under Surge Flow Irrigation written by Douglas James Hunsaker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Irrigation efficiency categories.
The intermittent or cyclic application of water to furrows or borders, a method known as "surge flow irrigation", can significantly improve the advance characteristics of surface irrigation. Numerous field studies have shown that the advance of furrows is considerably more rapid when irrigated by surge flow than by the conventional, continuous flow method. In addition, the advance rates of surge flow have been found to be less variable among furrows than by those of continuous flow. Furthermore a large difference between surge and continuous flow is generally seen in the volume of water required to complete the advance phase. These facts have led researchers to conclude that surge flow may be capable of significantly improving the efficiencies of surface irrigation. Two field experiments were conducted in southern Oregon during the 1983 irrigation season to investigate advance rate differences between surge flow treatments involving three different on-off time ratios and a continuous stream with an equal instantaneous discharge rate. Field data were used to construct power functions for each individual treatment relating advance time and advance distance. The derived power functions formed the primary basis from which the treatments were compared. The average advance-time and standard deviation for each treatment at designated stations along the furrow run were used in evaluating the variation in advance rates among treatments. The results of the field experiments, which were consistent with findings of other surge flow researchers, indicated that surge flow increased advance rates, significantly reduced water use in advance, and improved the advance uniformity among furrows. The experimental results will be submitted to others involved in surge flow research. To support the experimental studies, a computer model was developed and programmed to simulate both surge flow and continuous flow advance. The model was run for a continuous and a cycled flow with the model input based on the conditions during the second field experiment. In both cases the model underestimated the observed field advance. However, the infiltration input, which has a tremendous effect on the model results, had to be estimated from the observed field advance data rather than experimentally evaluated.
Improving Surge Flow Irrigation Efficiency Based On Analysis Of Infiltration And Hydrodynamic Effects
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Author : Ernest T. Smerdon
language : en
Publisher:
Release Date : 1985
Improving Surge Flow Irrigation Efficiency Based On Analysis Of Infiltration And Hydrodynamic Effects written by Ernest T. Smerdon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Irrigation categories.
Alternate And Surge Flow Furrow Irrigation Methods For Onion Production Evaluation In Humbo Ethiopia
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Author : Kassaw Beshaw
language : en
Publisher:
Release Date : 2020-06-22
Alternate And Surge Flow Furrow Irrigation Methods For Onion Production Evaluation In Humbo Ethiopia written by Kassaw Beshaw and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-06-22 with categories.
Master's Thesis from the year 2011 in the subject Biology - Ecology, Haramaya University (School of Graduate Studies), course: Irrigation Engineering, language: English, abstract: The aim of this experiment was to evaluate the conjunctive use of alternate and surge flow irrigation water application methods under field conditions. The specific objectives were: To evaluate flow characteristics and technical efficiency of alternate and conventional furrow irrigation under the application of surge flow, and to evaluate the combined effect of alternate and surge flow irrigations on the water use efficiency for onion production. The intermittent application of irrigation water in furrows permits more uniform distribution of infiltrated depth, considerable reduction of the volumes of water required, the possibility of using lighter irrigations, less water loss due to deep percolation and reduced leaching of fertilizers. All these benefits are associated with a clear reduction in the infiltration rate of the soil. This phenomenon occurs because, between one cycle and the next, the clods break up, particles are reoriented, and there is migration of the sediments that seal the base of the furrow. In addition, while the water supply in each cycle interrupted, air could trap in the soil pores. Both effects (reduction of infiltration and air interruption) facilitate the rapid advance of the water, solving the old problem of excessive losses of water by deep percolation at the beginning of the furrow. Therefore, many researchers are advocating the promises of surge flow irrigation in maximizing distribution uniformity, application efficiency, and minimizing the advance time, amount of irrigation water to be applied, loss of irrigation water through deep percolation and run off. Hence, the sustainability of the above-mentioned irrigation systems needs verification for local crop and management condition. Particularly, there are few works on the evaluation of combined use of the
Research Bulletin
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Author :
language : en
Publisher:
Release Date : 1988
Research Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Agriculture categories.
Infiltration And Aduance For An Open Ditch Surge Flow Furrow Irrigation System
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Author : R. Testezlaf
language : en
Publisher:
Release Date : 1985
Infiltration And Aduance For An Open Ditch Surge Flow Furrow Irrigation System written by R. Testezlaf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
The overall objective of this study is to determine through field experiments how surge flow affects the physiolocal performance of furrow irrigation and to evaluate an automated open-channel system for surge flow. The specific supporting objectives are: 1) to evaluate the hydraulic performance of the automated open-channel system for surge flow; 2) to determine the effects of different cycle times on the advance rate for surge flowand compare with continuous irrigation; 3) to attemp to achieve a cutback irrigation using surge flow; and 4) to determine the intake characteristics for surge flow and continuous irrigation for three differente tupes of soil.
Infiltration And Advance Under Surge Flow Furrow Irrigation
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Author : Gregory J. Poole
language : en
Publisher:
Release Date : 1981
Infiltration And Advance Under Surge Flow Furrow Irrigation written by Gregory J. Poole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Irrigation canals and flumes categories.
Spatial Variability Of Furrow Infiltration And Its Effect On Furrow Irrigation Advance
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Author : Eduardo Bautista Vera
language : en
Publisher:
Release Date : 1984
Spatial Variability Of Furrow Infiltration And Its Effect On Furrow Irrigation Advance written by Eduardo Bautista Vera and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Water Advance And Intake In Furrow Irrigation Under Surge Flow Conditions
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Author : Jorge F. Arosemena B.
language : en
Publisher:
Release Date : 1988
Water Advance And Intake In Furrow Irrigation Under Surge Flow Conditions written by Jorge F. Arosemena B. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Infiltration And Advance For An Open Ditch Surge Flow Furrow Irrigation System
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Author : Roberto Testezlaf
language : en
Publisher:
Release Date : 1985
Infiltration And Advance For An Open Ditch Surge Flow Furrow Irrigation System written by Roberto Testezlaf and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
Surge Irrigation
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Author : Blaine Hanson
language : en
Publisher:
Release Date : 1994
Surge Irrigation written by Blaine Hanson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Furrow irrigation categories.