AI3016 On-Farm Water Management Syllabus:

AI3016 On-Farm Water Management Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

 Understand the fundamental design of irrigation channels and diversion structures.
 Study about command area development.
 Know about availability and utilization of water resources.
 Impart knowledge on water use efficiency.
 Get an idea about automation of irrigation systems and water policies.

UNIT I DESIGN OF IRRIGATION CHANNELS

Design of Erodible (earthen), Non-Erodible (lined) & Alluvial channels (pre-fabricated) – Kennedy’s and Lacey’s Theories; Materials for Lining watercourses and field channel; Water control and Diversion structure – Design – Land grading – Land Levelling methods.

UNIT II COMMAND AREA

Command area – Concept – CADA Programmes in Tamil Nadu; Duty of water expression – relationship between duty and delta; Warabandhi – water distribution and Rotational Irrigation System – Participatory irrigation management.

UNIT III CONJUNCTIVE USE OF SURFACE AND GROUNDWATER

Availability of water – rainfall, canal supply and groundwater – conjunctive use – crop calendar – Irrigation demand – water requirement and utilization – Prediction of over and under utilization of water – Dependable rainfall – Rainfall analysis by Markov chain method – Probability matrix.

UNIT IV WATER BALANCE

Groundwater balance model – Weekly water balance – Performance indicators Appropriateness, Adequacy, Dependability, Equity, Reliability, Timeliness and efficiency – conjunctive use plan by optimization; Agricultural productivity indicators – Water use efficiency.

UNIT V DESIGN OF FARM DRAINAGE SYSTEM

Agricultural drainage – types and Concept – Issues; Principles of flow through soils – Darcy’s law – drainage coefficient -Infiltration theory; Surface drainage – methods – design – Random drainage – Herringbone – Grid iron types -Design of Open Drains. Steady State flow – Dupit’sForchimer assumptions -Hooghoudt’s equation; Methods & Design – Mole drains – Drainage wells – Pipe materials -Problem soils – Leaching Requirements; Land reclamation – methods of Reclamation.

TOTAL: 45 PERIODS
TEXT BOOKS

1. Michael, A.M. 2006. “Irrigation Theory and practice”, Vikas publishing house, New Delhi
2. Michael, A.M. and Ojha, T.P. “Principles of Agricultural Engineering -Vol II “,Jain Brothers, New Delhi,2002.

REFERENCES

1. Israelson,“Irrigation principles and practices”, John Wiley & sons, New York, 2002.
2. Modi, P.N., “Irrigation and water resources and water power engineering”, Standard Book House, New Delhi,2002.
3. Suresh, R., “Land and water management principles”, Standard Publishers & Distributors, New Delhi,2008

COURSE OUTCOMES

CO1 The students will be able to design irrigation channels and diversion structures.
CO2 The students will be able to organize the different CADA programme and involved farmers to participate
CO3 The students will be able to inspect the conjunctive use of water resources by farmers
CO4 The students will be able to identify water balance between productivity and water use efficiency in agricultural land
CO5 The students will be able to design the surface and subsurface drainage systems.