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Table of Contents
Hydraulic structures for flow diversion and storage
Structures for Flow Diversion –Investigation Planning and Layout
Instructional objectives
4.1.0 Introduction
1. Storage structure,
2. Diversion structure,
4.1.1 Barrages in different river regimes
4.1.2 Steps for planning, layout, design, construction and operation of barrages
4.1.3 Site investigation and data collection
Study of available maps and satellite imageries
Regional and site geology
Study of foundation strata
Study of available hydrological data
Assessment of water needed for diversion
Effect of the barrage on environment and ecology
Limitations on water withdrawal
Availability of construction material
Communication to the site of work
Detailed topographical survey
Hydro-meteorological data
Sediment concentration data
Pond survey
Study of navigation and fish
Study for power generation
Study for provision of a rail or a road bridge across the barrage
4.1.4 Location and alignment selection
4.1.5 Planning and layout
Design flood
Afflux
Free Board
Pond Level
Waterway
River training works
Crest levels of spillway and undersluice bays
Spillway bays
Undersluice bays
River –sluice bays
Cut-off
Pier
Divide wall
Abutment
Flank wall
Return wall
Guide bunds
Afflux bunds
Silt excluding devices
Navigation Lock
Fish pass
Canal Head Regulator
4.1.6 Finalisation of barrage layout through model studies