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1
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Module I
Introduction- Definition, Necessity, Scope, Benefits and ill effects of
irrigation, Types of irrigation schemes, Social and environmental
considerations, Irrigation development in India.
Water Requirement of Crops- Soil-water-plant relation- field
capacity, wilting point, available water, consumptive use, Irrigation
requirements – Net irrigation requirement, Field irrigation
requirement, Gross Irrigation requirement, Soil moisture extraction
pattern, Frequency of irrigation, Principal Indian crops, Gross
command area, Culturable command area, Intensity of irrigation,
Duty and delta relation, Introduction to various methods of
application of irrigation water, Irrigation efficiency, assessment of
irrigation water
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2
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Module 2
Diversion Works: Different stages of a river and their flow
characteristics, Weir and barrages, Various parts of a weir and their
functions, Exit gradient, Principles of weir design on permeable
formations -Bligh’s creep theory and Khosla’s theory
Storage and Outlet works:
Types of earthen dams, Seepage in earth dams, Gravity dams, Forces
acting on a gravity dam, Rock-fill dams, Spillways, Types of
spillways, Spillways gates and energy dissipation works.
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3
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Module 3
Distribution works:
Modes of conveying irrigation water- Types of irrigation canalscontour
canal, ridge canal, side sloping canals, Canal sections-filling,
cutting, partial cutting and partial filling, Balanced depth, Canal FSL,
Capacity factor and Time factor, L-section, Losses of canal water,
Silting and scouring of canals, Method of design of unlined section of
irrigation canal, Silt theories, Lined canals, Design of lined canal, Link
canals
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4
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Module 4
Regulating and Cross Drainage Works
Canal falls, Cross drainage works, Types of cross drainage works,
Canal escapes, Head regulator and Cross regulator, Silt ejector, Flow
meters - Parshall flume, Irrigation outlets and types of outlets.
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5
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Module 5
Water logging-causes, Reclamation, Drainage principles and practice
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