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Module I Basics of Agricultural Drainage
Water logging- causes and impacts;
Drainage, objectives of drainage, familiarization with the drainage problems of the state
Module II Drainage for Salt Control
Salt balance, reclamation of saline and alkaline soils,
leaching requirements, conjunctive use of fresh and saline water
Module III Surface Drainage Systems
Surface drainage coefficient, types of surface drainage, design of
surface drains;
Practice
Module IV Subsurface Drainage Systems
Sub-surface drainage: purpose and benefits, investigations of design parameters hydraulic conductivity, Drainable porosity, water table;
Derivation of Hooghoudt’s and Ernst’s drain spacing equations; design of subsurface drainage system;
Practice
Suggested Reading
Drainage: Definition
Water logging Problem
Causes of water logging
PDF: Introduction to land drainage
PDF: Land drainage system
Youtube: Drainage for Reclamation of Waterlogged Saline Soils – India
Salinity problems
Water and salt stress coefficient
PDF: Salt problem in Soil and Water_1
PDF: Salt problem in Soil and Water_2
Youtube: Saline Soils
Youtube: Fixing Saline Soils
Different layout of surface drainage system
Drainage coefficient
Introduction to sub-surface drainage
PDF: Design of Surface Drainage Systems
PDF: Introduction to sub-surface drainage
Youtube: Surface drainage system design-1
Youtube: Surface drainage system design-2
Youtube: Drainage Coefficients
Practice (5.5 hr)
Subsurface Drainage Design Parameters
Subsurface Drainage Coefficient
Hydraulic conductivity
Drainable Porosity
Steady flow to drains
PDF: Investigation of Drainage Design Parameters
PDF: Steady-State Flow to Drains
Youtube: Drain Tile Basics
Practice (2 hr)
Dupuit's assumptions
Hooghoudt's Equation
PDF: Hooghoudt Equation
Practice (1 hr)
Earnst's equation
Different cases of tile-drainage placement
PDF: Ernst Equation
Practice (1 hr)
Unsteady flow to drains
De-zew Helinga Theorem
Gloverdum equation
Design of pipe/ tile drainage system
Spacing and depth
Gravel pack design
Practice (2 hr)
Materials for pipe drainage system
PDF: Materials for Pipe Drainage Systems
Practice (1 hr)
Hydrology, Crop Modeling
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