|Irrigation Engineering||Learning Schedule|
|Pre-requisites: — Hydrology||3||0||0||3|
In this course, the students will know the importance of irrigation system in India and water requirement of crops. They will also know the hydraulic design of various irrigation structures such as weir, barrage, cross drainage works, dams, silt ejector and excluder, earth dam, canal falls. They will know the various components of head works and head regulator.
- To get the exposure about the use of water for the purpose of irrigation work in India.
- They will know to plan and design the diversion head works, head regulator, canal system and other important features to be used in irrigation projects.
- To understand the concept and design of water storage, flood control and river training work.
- To have clear idea about different kind of energy dissipaters and desilting & overflow arrangements.
On completion of this course, the students will be able to
- To calculate water requirement related to crops for different seasons in India.
- Do hydraulic design of different components of irrigation projects.
- They will learn different types of water storage works.
- They will also learn to calculate and design flood control devices.
Unit I: Water Requirements for Crops
Irrigation requirements in India: Scope, Soil moisture & Plant growth, crop water requirements, Irrigation Scheduling, Irrigation efficiencies, Duty-Delta-base period & relation between them, Surface & subsurface irrigation method, Irrigation water Quality.
Unit-II: Diversion head works
Introduction, layout of diversion headwork and its component, khosla’s theory and concept of flow net, safe exit gradient, hydraulic design of weir on bligh’s theory and design of modern barrage on khosla’s theory. Necessity & functioning of silt excluder & silt extractor.
Unit III: Cross Drainage Work & Canal Falls
Classification and selection of cross drainage work, hydraulic design aspects of aqueduct and syphon aqueduct.
Canal falls: Necessity and classification of canal falls, hydraulic design of Sarda type and a Straight Glacis fall.
Unit IV: Storage Head Works
Necessity and classification of Dams, Selection of site of Dam.
Gravity Dam: Introduction, Forces acting on Dam, Stability criterion, Elementary profile of dam, Drainage gallery, Hydraulic design of gravity dam.
Earth Dam: Introduction, design principle, seepage throughout dam, seepage line, control of seepage, and design of filter.
Unit V: Spillways and Energy Dissipation
Necessity and classification of Spillway, essential requirements of spillways capacity and their suitability, Hydraulic design of Ogee spillway.
Energy Dissipater: Stilling basin and its hydraulic design, USBR and IS stilling basin and their hydraulic requirement.
- Irrigation Engineering and Hydraulic Structures, S.K. Garg, Khanna Publications.
- Irrigation and Water Power Engineering, B.C. Punmia, Laxmi Publication.
- Viessmen, Jr. & Lewis, Introduction to Hydrology, PHI Learning Private Ltd.
- Agarwal, V.C. Groundwater Hydrology. PHI Learning Private Ltd.
- Larry W. Mays, Water Resources Engineering. Wiley Publications.
- Subramanya, K., Engineering Hydrology, Tata McGraw-Hill.