Environmental Science
8 years ago

Water repellency in soil leads to drier upper layers and altered moisture distribution.

Journal of Hydrology and Hydromechanics
Soil water repellency changes with depth and relationship to physical properties within wettable and repellent soil profiles
Nasrollah Sepehrnia, Mohammad Ali Hajabbasi, Majid Afyuni, Ľubomír Lichner

Paper Summary

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The study looked at how water repellency in soil affects its properties at different depths. They compared wettable and water repellent soils from 0-60 cm deep. Soil organic matter was found to be the main factor causing water repellency. Water repellent soil was drier in the upper layer and had higher bulk density and hydraulic conductivity compared to wettable soil. Wettable soil had higher sorptivity measures. Indices like WRCT and RIm can detect the degree of water repellency in soils.