Using microtomography, image analysis and flow simulations to characterize soil surface seals

Authors:
Jari HyväLuoma;Mahesh Thapaliya;Jarno Alaraudanjoki;Taisto SiréN;Keijo Mattila;Jussi Timonen;Eila Turtola
Affiliations:
MTT Agrifood Research Finland, Jokioinen, Finland;MTT Agrifood Research Finland, Jokioinen, Finland and Department of Physics, University of Jyväskylä, Finland;Department of Physics, University of Jyväskylä, Finland;MTT Agrifood Research Finland, Jokioinen, Finland;Department of Physics, University of Jyväskylä, Finland;Department of Physics, University of Jyväskylä, Finland;MTT Agrifood Research Finland, Jokioinen, Finland
Venue:
Computers & Geosciences
Year:
2012

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Abstract

Raindrops that impact on soil surface affect the pore structure and form compact soil surface seals. Damaged pore structure reduces water infiltration which can lead to increased soil erosion. We introduce here methods to characterize the properties of surface seals in a detailed manner. These methods include rainfall simulations, x-ray microtomography, image analysis and pore-scale flow simulations. Methods were tested using clay soil samples, and the results indicate that the sealing process changes several properties of the pore structure.