Résumé :
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The design and installation of a flume is usually desirable for measuring and regulating the flow of water in irrigation canals and for measuring the discharge of non-navigable streams, drains, free-flowing sewers, and so on. In this book we are attempting to put the measurement of flow on a solid scientific foundation by developing a sound theory, and with considerable experience in adapting theses structures that are most suitable to existing water management needs.This book is organized so that relatively inexperienced users can quickly understand the basic concepts and can design flumes for immediate use. In the first chapter wa discuss the "why" of the structure and "how" it fits into the overall scheme of the channel system. Chapter 2 describes methods for detecting head or water level, which is related to the flow rate or discharge of the various structures. Chapters 3 to 6 contain a number of different types of structures including rating tables, design and selection procedures, and examples. Chapter 7 contains the basic hydraulic theory for users desiring more hydraulic background. Chapter 8 provides information on the design of drop structures, compiled from existing information on these structures, and presents procedures for selecting the type of drop structure and for preparing a hydraulic design. Chapter 9 contains a computer program for producing rating tables for long-throated flumes and also presents the related theory.
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