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Design and operation of irrigation systems for smallholder agriculture in South Asia. Part 2












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    Book (series)
    Design and operation of irrigation systems for smallholder agriculture in South Asia. Part 1 1986
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    In the formulation of projects for irrigation of smallholdings in South Asia there are a number of questions relating to water allocation and distribution which arise very frequently. They include economic and sociological issues, as well as technical. In the following paper project design is discussed with particular regard to these issues. The paper does not provide comprehensive coverage of irrigation system design, but focusses on key issues and options, consideration of which is basic to pr oject formulation. The paper is intended for both administrative and technical readers.
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    Book (series)
    Irrigation in Africa south of the Sahara
    A Study, with particular reference to Investment for food production
    1986
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    This study reviews the present state of irrigated agriculture in SSA with special reference to its contribution to food production. It examines the results of some past investments in irrigation schemes and from the results it seeks to identify the various forms of irrigation development which are likely to be most appropriate to regional needs in the future. For this latter purpose irrigation is considered in the widest sense: not only as any human action which can influence the natural flow of water to or from the farmer's crop, but also as those forms of agriculture which take advantage of naturally rising or falling water levels for crop production.
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    Book (stand-alone)
    Irrigation design manual 2023
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    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.

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