UNIT 1:
Rooting characteristics, Soil water tension and soil water stress
Soil water potential concept, total, and gravitational potential
Soil water retention-infiltration-factors influencing infiltration rate
Measurement of infiltration –permeability-determination
Movement of water in soils
Hydraulic conductivity-determination
UNIT 2:
Water Resources- River basins
Development and Utilization in India and Tamil Nadu
Irrigation- Moisture use of crop
Evapo transpiration - ET – plot
Crop water requirement - duty and delta -Effective rainfall
Scheduling - Irrigation requirement - Irrigation frequency, Irrigation efficiencies
UNIT 3:
Hydraulics and design - Erodible and non-erodible, alluvial channels
Materials for lining water courses and field channel
Water control and diversion structure
Underground pipeline irrigation system
Land grading - Land levelling methods.
UNIT 4:
Irrigation structures, channel lining
Land grading, different design methods and estimation of earth work and cost
Soil water plant relationship, soil water movement
Infiltration and its equations, soil moisture constants
Depth of irrigation, frequency of irrigation, irrigation efficiencies
Surface irrigation methods of water application, border, check basin, furrow and contour irrigation.
UNIT 5:
Agricultural drainage – Drainage coefficient; principles of flow through soils
Darcy’s law – infiltration theory, Surface drainage systems
Subsurface drainage - Design of subsurface drainage - Pipe materials
Mole drains, drainage wells, Leaching requirements - irrigation and drainage water quality
Recycling of drainage water for irrigation – Fertigation
Case studies on drainage in Assam and West Bengal, Visit to Dams & Irrigation Canal.
