Download or read book Design and Operation of Irrigation Systems for Smallholder Agriculture in South Asia written by D. E. Campbell and published by Food & Agriculture Org.. This book was released on 1986 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Operation of Irrigation Systems for Smallholder Agriculture in South Asia written by D. E. Campbell and published by . This book was released on 1986 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Operation of Smallholder Irrigation in South Asia written by D. E. Campbell and published by World Bank Publications. This book was released on 1995 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: World Bank Technical Paper No. 256. World Bank lending contributes substantially to financing irrigation investments around the world. Asia has been the chief recipient of such World Bank lending, receiving 70 percent. India alone accounts for 27 p

Download or read book Design and Operation of Irrigation Systems for Small holder Agriculture in South Asia written by and published by . This book was released on 1985 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Operation of Irrigation System for Small Holder Agriculture in South Asia written by D. E. Campbell and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamentals of Smallholder Irrigation written by B. Albinson and published by IWMI. This book was released on 2002 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smallholder irrigation systems–where farm sizes generally range from a fraction of a hectare to 10 hectares–pose special management problems, especially where the water available for irrigation is frequently less than the demand. The intensity of system adjustments required to meet individual farmer demands, and the administrative complexity of measuring and accounting water deliveries have generally proven excessive when attempting to meet “on demand” schedules, resulting in chaos (often characterized by illegal tampering with infrastructure, and vast differences of water use intensity at different locations in the system). The alternative–provision of a simple service, based on proportional sharing of available supplies on the basis of landholdings–has been resilient for many years over vast areas. The approach is based on a clear delineation between the part of the irrigation system that is actively managed (at various flow rates and water levels) and the part of the system that operates either at full supply level (with proportional division of water down to the level at which farmers rotate among their individual farms), or is completely shut. This operational design is known as a “structured” system, and has well-defined hydraulic characteristics, simplifying operation and management, in turn allowing a clearer definition of water entitlements and the responsibilities of agency staff and farmers. The approach is particularly suited to areas where water is scarce and discipline is needed to ration water among users. An additional benefit, which has been demonstrated in modeling studies using a well–proven model relating to water and yield, is that the productivity of water (which is more important than the more traditional productivity of land when water is scarce) is substantially increased when deficit irrigation is practiced–a widely observed and predictable response to rationed water supplies. Structured systems are most suited where water is scarce, clear definition of water entitlements is needed, management capacity is limited, and investment resources are limited. The approach to determining critical aspects of a structured system design is described in this report.

Download or read book Design and Operation of Irrigation Systems for Smallholder Agriculture in South Asia written by D. E. Campbell and published by Food & Agriculture Organization of the UN (FAO). This book was released on 1986 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Irrigation Policy and Management in Southeast Asia written by International Rice Research Institute and published by Int. Rice Res. Inst.. This book was released on 1978 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planning and design of irrigation systems; management, operation, and maintenance of irrigation systems;economic analyses of irrigation; organization of irrigation activities and behavior of irrigators.

Download or read book Drip Irrigation for Agriculture written by Jean-Philippe Venot and published by Routledge. This book was released on 2017-07-06 with total page 362 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 Evolution of Irrigation in South and Southeast Asia written by Randolph Barker and published by IWMI. This book was released on 2004 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guidelines for the Design of Agricultural Investment Projects written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 1993 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Small Scale Irrigation and the Rural Poor in South Asia written by Salehuddin Ahmed and published by . This book was released on 1990 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canal Irrigation in Prehistoric Mexico written by William E. Doolittle and published by University of Texas Press. This book was released on 2014-07-03 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prehistoric farmers in Mexico invented irrigation, developed it into a science, and used it widely. Indeed, many of the canal systems still in use in Mexico today were originally begun well before the discovery of the New World. In this comprehensive study, William E. Doolittle synthesizes and extensively analyzes all that is currently known about the development and use of irrigation technology in prehistoric Mexico from about 1200 B.C. until the Spanish conquest in the sixteenth century A.D. Unlike authors of previous studies who have focused on the political, economic, and social implications of irrigation, Doolittle considers it in a developmental context. He examines virtually all the known systems, from small canals that diverted runoff from ephemeral mountain streams to elaborate networks that involved numerous large canals to irrigate broad valley floors with water from perennial rivers. Throughout the discussion, he gives special emphasis to the technological elaborations that distinguish each system from its predecessors. He also traces the spread of canal technology into and through different ecological settings. This research substantially clarifies the relationship between irrigation technology in Mexico and the American Southwest and argues persuasively that much of the technology that has been attributed to the Spaniards was actually developed in Mexico by indigenous people. These findings will be important not only for archaeologists working in this area but also for geographers, historians, and engineers interested in agriculture, technology, and arid lands.

Download or read book Energy irrigation nexus in South Asia Improving groundwater conservation and power sector viability written by Shah, T., Scott, C., Kishore, A., Sharma, A. and published by IWMI. This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the highly populated South Asian region, where pump irrigation has gained predominance over gravity-flow irrigation in recent decades, the fortunes of groundwater and energy economies are closely tied. Little can be done in the groundwater economy that will not affect the energy economy, and the struggle to make the energy economy viable is frustrated by the often violent opposition from the farming community to the rationalization of energy prices. As a result, the region's groundwater economy has boomed at the expense of the development of the energy economy. This report suggests that this does not have to be so; and the first step to evolving approaches to sustaining a prosperous groundwater economy with a viable power sector is for the decision makers in the two sectors to talk to each other, and jointly explore better options for energy-groundwater co-management which, the authors suggest, have so far been overlooked.

Download or read book Key Factors and Problems in the Design and Operation of Internationally Assisted Small holder Irrigation in South Asia written by D. E. Campbell and published by . This book was released on 1992 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Farmer Management of Groundwater Irrigation in Asia written by M. D. C. Abhayaratna and published by IWMI. This book was released on 1994-12 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Other Channels written by E. Walter Coward and published by . This book was released on 1988 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: