Since the weir has to safely pass down excess flow, estimation of peak flow becomes a first step in design of tank weirs. Catchment area of tank is small and fan shaped, so in practice it is difficult to measure the discharge. It is, therefore, estimated using empirical formulae. In north India Dicken’s formula is […]
Design of Tank Weir (With Formula) | Tank Irrigation | Irrigation
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Design Principles for Weir | Canal Headwork | Irrigation Engineering
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A weir or a barrage is the most important component of a head-works. Therefore it is necessary here to understand the principles on which a weir is designed. Following data is required to design a weir: (a) Design Flood Discharge: Maximum flood discharge data of the river recorded in past is collected. From it future […]
Protection of Canal Bed: 6 Devices | Canals | Irrigation Engineering
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The canal bed is protected by adopting six main devices: 1. Water-Cushion 2. Baffle Wall 3. Biff Wall 4. Deflector 5. Staggered Blocks 6. Friction Block. Device # 1. Water-Cushion: When a water cushion is provided below the fall it serves two purposes. Firstly it reduces the intensity of impact of falling sheet of water. […]