Download or read book Irrigation System Efficiency Study written by United States. Bureau of Reclamation and published by . This book was released on 1987 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Planning and Evaluation of Irrigation Projects written by Raveendra Kumar Rai and published by Academic Press. This book was released on 2017-04-06 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planning and Evaluation of Irrigation Projects: Methods and Implementation presents the considerations, options and factors necessary for effective implementation of irrigation strategies, going further to provide methods for evaluating the efficiency of systems-in-place for remedial correction as needed. As the first book to take this lifecycle approach to agricultural irrigation, it includes real-world examples not only on natural resource availability concerns, but also on financial impacts and measurements. With 21 chapters divided into two sections, this book is a valuable resource for agricultural and hydrology engineers, conservation scientists and anyone seeking to implement and maintain irrigation systems. - Uses real-world examples to present practical insights - Incorporates both planning and evaluation for full-scope understanding and application - Illustrates both potential benefits and limitations of irrigation solutions - Provides potential means to increase crop productivity that can result in improved farm income
Download or read book A Case History Study to Document the Effectiveness of Water Use Efficiency Research written by Wayne Cunningham and published by . This book was released on 1981 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drip Irrigation for Agriculture written by Jean-Philippe Venot and published by Taylor & Francis. This book was released on 2017-07-06 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initially associated with hi-tech irrigated agriculture, drip irrigation is now being used by a much wider range of farmers in emerging and developing countries. This book documents the enthusiasm, spread and use of drip irrigation systems by smallholders but also some disappointments and disillusion faced in the global South. It explores and explains under which conditions it works, for whom and with what effects. The book deals with drip irrigation 'behind the scenes', showcasing what largely remain 'untold stories'. Most research on drip irrigation use plot-level studies to demonstrate the technology’s ability to save water or improve efficiencies and use a narrow and rather prescriptive engineering or economic language. They tend to be grounded in a firm belief in the technology and focus on the identification of ways to improve or better realize its potential. The technology also figures prominently in poverty alleviation or agricultural modernization narratives, figuring as a tool to help smallholders become more innovative, entrepreneurial and business minded. Instead of focusing on its potential, this book looks at drip irrigation-in-use, making sense of what it does from the perspectives of the farmers who use it, and of the development workers and agencies, policymakers, private companies, local craftsmen, engineers, extension agents or researchers who engage with it for a diversity of reasons and to realize a multiplicity of objectives. While anchored in a sound engineering understanding of the design and operating principles of the technology, the book extends the analysis beyond engineering and hydraulics to understand drip irrigation as a sociotechnical phenomenon that not only changes the way water is supplied to crops but also transforms agricultural farming systems and even how society is organized. The book provides field evidence from a diversity of interdisciplinary case studies in sub-Saharan Africa, the Mediterranean, Latin America, and South Asia, thus revealing some of the untold stories of drip irrigation.
Download or read book On Irrigation Efficiencies written by Marinus Gijsberthus Bos and published by . This book was released on 1990 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction;definition of the problem;method of investigation applied;some results not directly related to irrigation efficiency;analysis and evaluation of the data from the questionnaire with respect to irrigation efficiency;practical application of the study results with some examples;evaluation of the applied approach;conclusions and recommendations.
Download or read book Quantifying Water and Energy Linkages in Irrigation written by Asian Development Bank and published by Asian Development Bank. This book was released on 2017-07-01 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: While Asia has the world's fastest-growing economy, 29 of 48 countries assessed by the Asian Water Development Outlook are water-insecure, posing a threat to the region's continued growth. As economies develop, increasing demands will be placed on water for food and water for energy. In the irrigation subsector, energy is required for ground and surface water pumping, as well as for fueling on-farm irrigation technology and other farm machinery. Water and energy are intrinsically linked, yet there is limited information on quantifying energy use in irrigation systems. This publication summarizes the results of a pilot study to quantify water and energy use in high-efficiency irrigation systems within drought-affected provinces in Viet Nam.
Download or read book Management Performance and Applications of Micro Irrigation Systems written by Megh R. Goyal and published by CRC Press. This book was released on 2014-08-19 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Management, Performance, and Applications of Micro Irrigation Systems, the fourth volume in the Research Advances in Sustainable Micro Irrigation series, emphasizes sustainable and meaningful methods of irrigation to counter rampant water scarcity. In many parts of the world, this scarcity significantly affects crop yield, crop quality, and, conseq
Download or read book Efficiency of Different Irrigation Systems for Sustainable Management of Water and Nutrient Flows in the Harvey Irrigation Area written by Ainalem Nega and published by . This book was released on 2011 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated abstract] Sustainable management of water resources and the mitigation of nutrient flows into the Peel Harvey inlet from irrigated farmland can be achieved through a combination of land management practice and the implementation of efficient irrigation systems. A quantitative understanding of efficiency for individual irrigation systems is required to determine the efficacy of system employed to grow crops or pastures and improve water resource and delivery management. An improved understanding is gained through the evaluation of design and water application methodologies utilized in the Harvey Irrigation District in Western Australia. Various irrigation system performance measures are used to evaluate and compare the irrigation systems. Soil moisture measurements over a 60 mm depth were taken before and after irrigation for each application system to determine the temporal and spatial variability of soil moisture within the study area. The four irrigation systems (floppy, solid set, center pivot and subsurface drip) used in the Harvey Irrigation District were compared using efficiency and uniformity criteria. Soil moisture measurements were taken at the Waroona Research Station for each irrigation system before and after the irrigation cycle, over 60 mm depth using a thetraprobe. A ten m grid spacing for irrigation performance measures and a five m grid spacing was used to assess soil moisture retention rates. The combined water application and irrigation efficiency for each sprinkler system was: 73.4% for floppy; 68% for solid set; 81.2% for center pivot; and 94.4% for subsurface drip system. The total system efficiency from reservoir to experimental plot was derived for each system and given as: floppy 59.0%, solid set 54.0%, center pivot 65.0% and subsurface drip 75.0% irrigation methods. The average low-quarter distribution uniformity (DUlq) was: 50.0% for floppy: 52.0% for solid set: 56.2% for center pivot; and 84.4% for subsurface drip irrigation system...
Download or read book 9789290908487 written by Giordano, Meredith and published by Colombo, Sri Lanka: International Water Management Institute (IWMI) Washington, DC, USA: The World Bank. This book was released on 2017-06-01 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irrigation in the Mediterranean written by François Molle and published by Springer. This book was released on 2019-05-09 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mediterranean irrigation is diverse due to, among other factors, the relative importance of water in the economy of each country, varied levels of aridity, heterogeneous levels economic, social and technological levels of development, and differences in political and social organization. However, most of the Mediterranean countries face similar problems to meet their water demands because of the scarcity and variability of renewable resources, growing water requirements from non-agricultural sectors, increasing environmental concerns related to water quality and environmental degradation, a social demand for larger public participation, and important technological changes. The time has come to reconsider the “not one drop lost to the sea” philosophy of yesteryears largely and to 'live within limits'. This book focuses on eight selected countries (Tunisia, Morocco, Spain, France, Italy, Turkey, Israel and Egypt) and provides a comparative perspective that both thoroughly explores their specificities and identifies the common challenges faced by the irrigation sector in these countries. The book has been written at a critical moment, when the continued application of a supply-side water management model is revealing its unsustainable nature in numerous places; when significant technological changes are taking place in the irrigation sector; when new forms of management and governance are widely held as badly needed; and finally, when climate change is compounding many of the difficulties that have characterized irrigation policies and practices in the past decades. This complicated future context makes Mediterranean irrigation face various political dilemmas on water management, raising social tensions, triggering territorial and land conflicts, and stimulating new technological developments. This book provides a timely analysis of the particular trajectory of eight Mediterranean countries in these uncertain transformations, and attempts to identify the best strategies to avert or overcome future risks.
Download or read book Impacts of Improving Efficiency of Irrigation Systems on Water Availability in the Lower South Platte River Basin written by and published by . This book was released on 1978 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Agronomy for Sustainable Agriculture written by Francisco J. Villalobos and published by Springer. This book was released on 2017-01-25 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook explains the various aspects of sustainable agricultures to undergraduate and graduate students. The book first quantifies the components of the crop energy balance, i.e. the partitioning of net radiation, and their effect on the thermal environment of the canopy. The soil water balance and the quantification of its main component (evapotranspiration) are studied to determine the availability of water to rain fed crops and to calculate crop water requirements. Then it sets the limitations of crop production in relation to crop phenology, radiation interception and resource availability (e.g. nutrients). With that in mind the different agricultural techniques (sowing, tillage, irrigation, fertilization, harvest, application of pesticides, etc.) are analyzed with special emphasis in quantifying the inputs (sowing rates, fertilizer amounts, irrigation schedules, tillage plans) required for a given target yield under specific environmental conditions (soil & climate). For all techniques strategies are provided for improving the ratio productivity/resource use while ensuring sustainability. The book comes with online practical focusing on the key aspects of management in a crop rotation (collecting weather data, calculating productivity, sowing rates, irrigation programs, fertilizers rates etc).
Download or read book Evaluating Irrigation System Performance written by Timothy Gerard Kelley and published by . This book was released on 1989 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Producing More Rice with Less Water from Irrigated Systems written by Luis Catasús Guerra and published by IWMI. This book was released on 1998 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, we have witnessed a growing scarcity of and competition for water around the world. As the demand for water for domestic, municipal, industrial, and environmental purposes rises in the future, less water will be available for agriculture. But the potentials for new water resource development projects and expanding irrigated area are limited. We must therefore find ways to increase the productivity of water used for irrigation. This paper reviews the literature on irrigation efficiency and on the potential for increasing the productivity of water in rice-based systems. It stresses the continuing confusion over the concepts of irrigation efficiency and water productivity. It identifies the reasons for the wide gap between water requirement and actual water input (both irrigation diversions and rainfall) in irrigated rice production systems and discusses potential opportunities for increasing water productivity both on-farm and at the system level. Based on the reported low farm and system level irrigation efficiencies, the potentials for water savings in rice production appear to be very large. But we do not know the degree to which various farm and system interventions will lead to sustainable water savings in the water basin until we can quantify the downstream impact of the interventions. Studies on the economic benefits and costs, and environmental aspects of alternative interventions are also lacking. This paper emphasizes the need to measure the productivity of water at farm, system, and basin levels, and to understand how the productivity at one level relates to the productivity at another. Without water balance studies to measure productivity at these different scales, it is not possible to identify the potential economic benefits of alternative interventions and the most appropriate strategies for increasing irrigation water p productivity in rice-based systems.
Download or read book Water Use Efficiency for Irrigated Turf and Landscape written by Geoff Connellan and published by CSIRO PUBLISHING. This book was released on 2013-02-20 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achieving high water use efficiency in maintaining turf, trees and landscape areas is a core responsibility of open space managers. Water Use Efficiency for Irrigated Turf and Landscape provides a logical and scientifically sound approach to irrigation in urban areas in Australia. It is based on green space delivering defined outcomes using the principles of water sensitive urban design and irrigation efficiency. The book covers all stages of the water pathway – from the source to delivery into the plant root zone. Major topics include system planning, estimating water demand, water quality, irrigation systems, soil management and irrigation performance evaluation. Clearly presented explanations are included, as well as line drawings and worked examples, and a plant water use database covering more than 250 plant species. A Water Management Planning template is included to guide water managers and operators through a process that will deliver a sound plan to achieve sustainable turf, urban trees and landscapes. Best Management Practice Irrigation principles are outlined and their implementation in open space turf and landscape situations is explained. The benefits and limitations of the various methods of delivering water to plants are covered, together with case studies and guidelines for specific horticultural situations. Methodologies to evaluate irrigated sites are included along with recommended benchmark values. The book presents the latest irrigation technology, including developments in water application, control technology and environmental sensors such as weather stations, soil moisture sensors and rain sensors.
Download or read book Agricultural Water Management written by National Research Council and published by National Academies Press. This book was released on 2007-03-20 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains a collection of papers from a workshopâ€"Strengthening Science-Based Decision-Making for Sustainable Management of Scarce Water Resources for Agricultural Production, held in Tunisia. Participants, including scientists, decision makers, representatives of non-profit organizations, and a farmer, came from the United States and several countries in North Africa and the Middle East. The papers examined constraints to agricultural production as it relates to water scarcity; focusing on 1) the state of the science regarding water management for agricultural purposes in the Middle East and North Africa 2) how science can be applied to better manage existing water supplies to optimize the domestic production of food and fiber. The cross-cutting themes of the workshop were the elements or principles of science-based decision making, the role of the scientific community in ensuring that science is an integral part of the decision making process, and ways to improve communications between scientists and decision makers.
Download or read book Irrigation written by Sandra Ricart and published by BoD – Books on Demand. This book was released on 2019-12-18 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The management of irrigation systems is context-dependent, socially constructed, and technically uncertain. An example of complex social-ecological systems, irrigation deals with both the ecosystem uncertainty and the implementation of new technological systems and water management options. Issues to be addressed by irrigation systems at the global scale include: water productivity and food security, field operation and maintenance, spate irrigation in climate change scenarios, and vulnerability of environmental resources. This book provides examples of some of the current challenges faced by irrigation systems from technical and social perspectives. The book offers an easy-to-follow format focused on different case studies combining evidence-based solutions for increasing resilience and reducing vulnerability of irrigation systems in semi-arid and arid regions across the world.
