Calculating Average Volumetric Water Content After Rainfall: A Step-by-Step Guide

To calculate the average volumetric water content after a rainfall event, we need to consider the amount of water added to the soil profile and the volume of the soil profile.

The amount of water added to the soil profile can be calculated by subtracting the interception loss from the total rainfall:

Rainfall after interception loss = 6.4 cm - (28% * 6.4 cm) = 6.4 cm - 1.792 cm = 4.608 cm

Next, we need to calculate the volume of the soil profile:

Volume of soil profile = depth of soil profile * area of soil profile

Assuming the area of the soil profile is 1 square meter, the volume of the soil profile would be:

Volume of soil profile = 68 cm * 1 m^2 = 68 cm^3

Finally, we can calculate the average volumetric water content after the rainfall event:

Average volumetric water content = (initial water content + added water) / volume of soil profile

Average volumetric water content = (0.27 cm^3/cm^3 + 4.608 cm) / 68 cm^3

Average volumetric water content ≈ 0.069 cm^3/cm^3