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Side weirs are used widely in order to divert flows from rivers, canals, sewers and reservoirs. However, the hydraulic behaviour of this type of weir is complex and difficult to predict accurately by simple methods. This invaluable book presents a new design procedure that was developed by analysing published data on the performance of side weirs and using the results to calibrate a predictive numerical model. Presented in the form of graphs and simplified equations, this new method enables the flow rate discharged by a side weir to be determined by direct calculation. Hydraulic Design of Side Weirs provides practical guidance, leading the designer through the whole hydraulic design process to ensure that the structure operates as intended. The introductory chapters of the book describe alternative methods of flow regulation in natural and artificial channels, the factors that need to be considered when establishing design parameters for side weirs, and the hydraulic principles that underlie their performance.Useful guidance on the layout and construction of side weirs is illustrated by many practical examples, and detailed information is given for side weirs installed in rivers, navigable canals, irrigation canals, waste-water facilities and storm sewer overflows. Also included are worked examples demonstrating the use of the design procedure in practice. This handbook will be essential reading for consultants and contractors and all those involved in the design, planning and construction of side weirs forming key components of hydraulic systems. The book will also be a valuable reference tool for engineering students.