Does Surge Flow Improve The Efficiency Of Border Check Irrigation
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Does Surge Flow Improve The Efficiency Of Border Check Irrigation
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Author : Lateiro Salvador De Sousa
language : en
Publisher:
Release Date : 2011
Does Surge Flow Improve The Efficiency Of Border Check Irrigation written by Lateiro Salvador De Sousa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Irrigation categories.
[Truncated abstract] Improved irrigation performance can deliver both environmental and economic benefits from the production of irrigated crops. The objective of efficient irrigation design is to increase water application efficiency, distribution uniformity and requirement efficiency, while reducing deep percolation and tail water drainage losses. By improving system efficiency water losses are minimised and crop yields may be increased. Efficient systems also lead to better environmental and economic outcomes for the producer. The Harvey Irrigation Area (HIA) in the southwest of Western Australia is unique in the State because water is provided without pumping costs. Border-check irrigation is currently the main method of water application used in dairy farming to produce grass and has been reported as having a low irrigation efficiency of 50%. Different options to improve irrigation efficiency are available. The objective of these options is to uniformly replenish root zone moisture reserves whilst minimizing water losses via deep percolation below the root zone and tail water drainage from the end of the field. Options to achieve these objectives include increasing inflow rate, reducing field length and selecting the appropriate cut-off time for the input supply of water. These three options can be manipulated simultaneously under conditions of 'surge' flow, if soil characteristics are known. This research investigates the effects of two different flow regimes on the performance of border-check irrigation using the Surface IRrigation MODel (SIRMOD) as a design tool. Continuous flow and surge flow were compared in order to provide guidelines for improving the efficiency of border-check irrigation in the Harvey Irrigation Area. In order to use SIRMOD for design purposes, the necessary infiltration parameters were obtained from soil texture data. Initially, literature values were used to ascertain if surge irrigation could deliver improved irrigation performance. Once it was confirmed that surge irrigation had potential benefits over the common practice of border check irrigation, the model parameters were refined by field measurement. Soil water content was also measured before and after irrigation in order to assess the irrigation efficiency and water distribution over the site. Field slope was also measured as an input parameter to SIRMOD. Finally, the most efficient surge flow design from the model studies was implemented in the field and compared directly to the conventional border check irrigation method. Results from these field irrigation trials could also be used as a further cross-check on model performance. The resulting optimised models for border check and surge flow provided the necessary efficiency criteria for judging the relative performance of the two systems. At all steps in the model parameter refinement procedure (literature data to field data to full field irrigation trial data) it was found that surge flow improved irrigation efficiency compared to the border check method. The implemented field trial confirmed the surge design performance predicted by the model and should give irrigation managers confidence in using this modelling approach to optimize irrigation performance across different areas of the HIA...
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.
Implementation And Evaluation Of Surge Flow Border Irrigation
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Author : Samir Mohamed Ismail
language : en
Publisher:
Release Date : 1984
Implementation And Evaluation Of Surge Flow Border Irrigation written by Samir Mohamed Ismail and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Hydraulic gates categories.
Rainfed Agriculture
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Author : Suhas Pralhad Wani
language : en
Publisher: CABI
Release Date : 2009-01-01
Rainfed Agriculture written by Suhas Pralhad Wani and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-01-01 with Technology & Engineering categories.
This book, which contains 14 chapters, covers all aspects of rainfed agriculture, starting with its potential, current status, rainwater harvesting and supplementary irrigation, to policies, approaches, institutions for upscaling, and impacts of integrated water management programmes in rainfed areas.
A Mathematical Model For Surge Flow Border Irrigation
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Author : Toraj Ghofrani
language : en
Publisher:
Release Date : 1987
A Mathematical Model For Surge Flow Border Irrigation written by Toraj Ghofrani and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Irrigation categories.
Environmental Impacts Of Pasture Based Farming
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Author : Richard W. McDowell
language : en
Publisher: CABI
Release Date : 2008
Environmental Impacts Of Pasture Based Farming written by Richard W. McDowell and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Grazing categories.
Focusing on the different types of grassland farming and their impact on the environment, this book addresses issues facing environmental quality, namely soil, water and air quality and socioeconomic impacts. It also offers a commentary on how the different pastoral sectors influence environmental issues.
Resource Conserving Techniques In Crop Production
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Author : A.R. Sharma
language : en
Publisher: Scientific Publishers
Release Date : 2011-03-01
Resource Conserving Techniques In Crop Production written by A.R. Sharma and has been published by Scientific Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-03-01 with Technology & Engineering categories.
Recent researches on resource conserving techniques have provided exciting opportunities for improving input-use-efficiency, productivity and sustainability. These techniques include: zero tillage, minimum tillage, rotary tillage, bed planting, surface seeding, laser land leveling, pressurized irrigation systems, system of rice intensification, aerobic rice, soil solarization, residue management, site-specific nutrient management, crop diversification, precision farming emplo-ying use of modern tools and procedures etc. Adoption of these techniques is the need of the hour as a method of 'low-input agriculture' to reduce costs and achieve sustainability in Indian agriculture. This book provides the most updated and comprehensive information on resource conserving techniques for improving crop productivity. The text is divided into 9 sections: (i) Concept and approaches, (ii) Cropping systems and diversification, (iii) Soil use and management, (iv) Improving nutrient use efficiency, (v) Water-saving techniques, (vi) Weed dynamics and herbicide use, (vii) Energy conservation and farm machinery, (viii) Modern tools and approaches, (ix) On-farm testing and evaluation. In each section, there are chapters on specific topics, contributed by eminent scientists, who made notable research contributions in their field of specialization. The chapters have been thoroughly edited and presented in an easily understandable manner.
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.
Sustainable Irrigation Management Technologies And Policies
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Author : Giulio Lorenzini
language : en
Publisher: WIT Press
Release Date : 2006
Sustainable Irrigation Management Technologies And Policies written by Giulio Lorenzini and has been published by WIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Technology & Engineering categories.
Fresh water is becoming an ever increasingly precious commodity, control of which could lead in the near future to the type of political instability now associated with energy shortages. This book addresses the different aspects of irrigation, including not only the management of water resources and scientific and technical aspects, but also matters related to policy and economics, researchers in academia and industry as well as professional practitioners and policy makers. Bringing together papers from the First International Conference on Sustainable Irrigation Management, Technologies and Policies, the book covers topics such as: Irrigation Controls; Irrigation Modelling; Irrigation Systems and Planning; Irrigation Management.
Selected Water Resources Abstracts
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Author :
language : en
Publisher:
Release Date : 1986
Selected Water Resources Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Hydrology categories.