Page 27 - soil-plant-water relationship and water requirement
P. 27
SOIL-PLANT-WATER RELATIONSHIP AND WATER REQUIREMENT
By Using the Kostiakov equation,
∝
=
The characteristic of the soil can be determined
EXAMPLE 2 - 1
The following data were obtained from the infiltration experiment for basin
irrigation system design.
Time,t (min) 10 20 30 60 120 180
Infiltration,i (cm) 1.0 1.6 2.1 3.4 5.4 7.2
Analyse data above and estimate the infiltration depth after 4.0 hour by
using Kostiakov equation.
Solution:
Time,t (min) 10 20 30 60 120 180
Infiltration,i (cm) 1.0 1.6 2.1 3.4 5.4 7.2
Log t 1 1.3 1.5 1.8 2.1 2.3
Log i 0 0.2 0.3 0.5 0.7 0.9
From table above, plot graph log i vs log t
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