Infiltration
Definitions
Infiltration: process by which water enters the soil surface

Infiltration capacity: maximum rate at which water can enter the soil
Infiltration Capacity
Some Important Soil Characteristics
Darcy’s Law (1856)
Hydraulic Conductivity in Soils
Infiltration by Horton’s method
Infiltration indices
An average constant value of infiltration is called infiltration index.
Two types of infiltration indices are commonly used.-index
1. f -index
2. w –index
Management Impacts
How to Measure Infiltration?
Double-ring infiltrometer
Disc Permeameter and Tension Infiltrometer
Multiple Intensities
Intensity – Infiltration
Factors which affect infiltration
Soil type
Initial soil moisture content
Rainfall
Quality of water
Biological factors
Vegetation
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