IRRIGATION AND HYDRAULIC STRUCTURES
- Irrigation necessity - Types of irrigation - Methods of supplying water - Assessment of irrigation water - Consumptive use and its determination - water requirement of various crops – Duty – Delta - Base period and crop period.
- Functions and components of a diversion head work - Function - selection of site - type of weirs on pervious foundations - cause of failure - Bligh's creep theory and Khosla's theory - complete design of a vertical drop weir.
- Gravity dams - Non overflow section - forces acting - stability rules - elementary profile - Low and High dams - drainage gallery - Construction joints - earth dams - stability of slopes by slip circle method - seepage analysis and its control
- Types of canals - canal alignment - Kennedy's silt theory - Lacey's silt theory - Design of canals using the above theories - economical depth of cutting - canal losses - canal maintenance - lined canals and their design - silt control measures.
- Canal falls - Necessity and location - Design of sand type fall - design of a cross regulator - cross drainage works - selection of suitable type of cross drainage work - canal outlets.
Note: Assignments include the drawings of various irrigation structures.
- Punmia, B.C., Irrigation and Water Power Engineering, Standard Publishers, 1992.
- Garg, S.K., Irrigation and Hydraulics Structures, Khanna Publishers, 1992.
- Sharma, S.K., Principles and Practice of Irrigation Engg, S.Chand & Co, 1984.