Download or read book Scheme Irrigation Water Needs and Supply written by C. J. Brouwer and published by Food & Agriculture Org.. This book was released on 1985 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irrigation Water Delivery Models written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 1994 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irrigation Scheme Operation and Maintenance written by W. Bart Snellen and published by Food & Agriculture Org.. This book was released on 1996 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Irrigation Scheme Operation and Maintenance is the tenth in the series of training manuals on irrigation prepared jointly with ILRI (International Institute for Land Reclamation and Improvement). The manual presents some of the difficulties that irrigation organizations confront in undertaking their duties and provides some orientations on how to resolve them. The paper then proceeds to discuss the methods of operating an irrigation network and the working principles involved. The maintenance tasks are discussed. To draw similarities and differences the maintenance of a motorcycle is used as a reference for the corresponding activities in an irrigation scheme. Finally, a reference is made to the need for having an effective financial control whereby the management of the system has enough resources to undertake the operation and maintenance tasks. The manual is addressed to small and medium schemes and assumes that the management organization is already in place.
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 Guidelines for Predicting Crop Water Requirements written by J. Doorenbos and published by . This book was released on 1975 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculation of crop evapotranspiration; Selection of crop coeficient; Calculation of field irrigation requirements.
Download or read book Irrigation design manual written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2023-03-27 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction about what this manual is covering concentrating on Large Scale Irrigation (LSI), diversion barrage or weir, intake (with auxiliary structures), and most common conveyance structures suitable for LSI. A very brief overview of an approach to match water needs with water availability (demand vs supply) with references and links to Food and Agriculture Organization (FAO) literature that is covering the topic in detail. A brief reference to the most common methods to obtain necessary hydrological parameters for IRR scheme design. A very brief overview of the importance of knowledge of geological conditions and the investigation needed to obtain geotechnical design parameters (including the most common geotechnical tests to obtain design parameters). Planning phase considerations regarding diversion and intake structure, discussing the role of the main components. More technical discussion on each component of the weir or intake, including formula and worked examples (hydraulic and structural computations). Conceptual, hydraulic, and structural considerations of main conveyance components, with emphasis and more detail on most used components (such as canals, siphons, aqueducts, retaining walls, etc.). A very brief overview of the approach to irrigation water management and Operations & Maintenance (O&M), with references and links to FAO literature that is covering the topic in detail. Standard specification for irrigation construction material.
Download or read book Hydrometeorology written by Kevin Sene and published by Springer Nature. This book was released on with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crop Water Requirement written by Rashmi Mehta and published by Ideal Thoughts. This book was released on 2018 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Conservation Reuse and Recycling written by Academy of Sciences of the Islamic Republic of Iran and published by National Academies Press. This book was released on 2005-03-01 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: In December 2002, a group of specialists on water resources from the United States and Iran met in Tunis, Tunisia, for an interacademy workshop on water resources management, conservation, and recycling. This was the fourth interacademy workshop on a variety of topics held in 2002, the first year of such workshops. Tunis was selected as the location for the workshop because the Tunisian experience in addressing water conservation issues was of interest to the participants from both the United States and Iran. This report includes the agenda for the workshop, all of the papers that were presented, and the list of site visits.
Download or read book Indicators for Comparing Performance of Irrigated Agricultural Systems written by D. J. Molden and published by IWMI. This book was released on 1998 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introsuction; Performance indicatores for comparison; Features of the selected indicators; The indicators; Application; Temporal and spatial variation of indicators within a project; Limitations of the indicators; Interpretation of results; Discussion; data requirements to calculate performance indicators; Calculation example of performance indicators; World markrt prices of agricultural; products in constant 1995 dollars.
Download or read book Structures for Water Control and Distribution written by B. E. van den Bosch and published by Food & Agriculture Org.. This book was released on 1993 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water intake to a field; Water level in field channels; Water distribution within the canal network; Elow measurement; Protective and other canal structures; Common problems in structures; Maintenance and repair works; Structures and minor scheme structure.
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 Drainage of Irrigated Lands written by H. P. Ritzema and published by Food & Agriculture Org.. This book was released on 1996 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deficit Irrigation Practices written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2002 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the context of improving water productivity, there is a growing interest in deficit irrigation, an irrigation practice whereby water supply is reduced below maximum levels and mild stress is allowed with minimal effects on yield. Under conditions of scarce water supply and drought, deficit irrigation can lead to greater economic gains than maximizing yields per unit of water for a given crop; farmers are more inclined to use water more efficiently, and more water-efficient cash crop selection helps optimize returns. However, this approach requires precise knowledge of crop response to water as drought tolerance varies considerably by species, cultivar and stage of growth. The studies present the latest research concepts and involve various practices for deficit irrigation. Both annual and perennial crops were exposed to different levels of water stress, either during a particular growth phase, throughout the whole growing season or in a combination of growth stages. The overall finding, based on the synthesis of the different contributions, is that deficit or regulated-deficit irrigation can be beneficial where appropriately applied. Substantial savings of water can be achieved with little impact on the quality and quantity of the harvested yield. However, to be successful, an intimate knowledge of crop behavior is required, as crop response to water stress varies considerably.
Download or read book Field guide to improve water use efficiency in small scale agriculture written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2019-09-24 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of irrigation in gearing agriculture development towards a broader economic growth is undeniable. Accordingly, irrigation is growing into key operational strategy for governments and their agencies to increase agricultural productivity, thus combatting food insecurity and boosting overall growth. While agriculture absorbs rural workforce, generates income and increases food security, it has become the most important driver in freshwater exploitation. The rapid expansion of water demand leads to the generalized phenomena of imbalance between water supply and water demand. This increasing pressure on water resources urges enhancing Water Use Efficiency. Enhancing Water Use Efficiency requires actions at all levels, from agricultural practitioners to scheme managers, and up to the policy-makers. The objective of this Field Guide is to show practical measures to improve Water Use Efficiency in small-scale agriculture based on case studies from Burkina Faso, Morocco and Uganda. The Book not only presents applicable Water Use Efficiency measures, but also guide the readers through their real-term implementation. While the Guide provides complete set of instructions to improve Water Use Efficiency in order to reach optimal irrigation practices, the successful outcome still depends on the farmers’ willingness to embrace and adopt the recommended measures. The Guide holds in evidence that farmers are often constrained by available resources to improve their practices in terms of budget, inputs or labour. In order to take these issues into account, the recommendations are limited on practical measures, which can be followed by farmers without requiring additional resources.
Download or read book How to support effective and inclusive irrigation water users associations written by Merrey, D. J. and published by International Water Management Institute (IWMI). CGIAR Research Program on Water, Land and Ecosystems (WLE).. This book was released on 2018-12-14 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Irrigation Hydrology and Management written by Saeid Eslamian and published by CRC Press. This book was released on 2023-05-31 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever-increasing population growth has caused a proportional increased demand for water, and existing water sources are depleting day by day. Moreover, with the impact of climate change, the rates of rainfall in many regions have experienced a higher degree of variability. In many cities, government utilities have been struggling to maintain sufficient water for the residents and other users. The Handbook of Irrigation Hydrology and Management: Irrigation Case Studies examines and analyzes irrigated ecosystems in which water storage, applications, or drainage volumes are artificially controlled in the landscape and the spatial domain of processes varies from micrometers to tens of kilometers, while the temporal domain spans from seconds to centuries. The continuum science of irrigation hydrology includes the surface, subsurface (unsaturated and groundwater systems), atmospheric, and plant subsystems. Further, the book includes practical case studies from around the world, including locations such as Africa, Australia, China, India, the Middle East, the United States, and more. Features: Offers water-saving strategies to increase the judicious use of scarce water resources Presents strategies to maximize agricultural yield per unit of water used for different regions Compares irrigation methods to offset changing weather patterns and impacts of climate change
