The heterogeneity of water flow was evaluated in sandy loam soil covered by grass. The radioactive tracer infiltration experiment was performed at two parallel plots with different irrigation intensities. Effective cross section and degree of preferential flow parameters were used to evaluate flow regime during the experiment. For both plots, the heterogeneity of water flow increased with depth. The differences in irrigation intensity did not result in different values of the effective cross section and degree of preferential flow, indicating similar flow regime within the two experimental plots. The heterogeneity of water flow in shallower depths (0–50 cm) did not change with cumulative infiltration except for early times/small cumulative infiltrations, when the flow paths of preferential flow were formed. In deeper depths (60–70 cm) the flow paths of preferential flow were formed later, and therefore, the heterogeneity of water changed with cumulative infiltration.
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degree of preferential flow
effective cross section
fraction of cross-sectional area
fraction of total water content change
time domain reflectometry
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Lichner, Ľ., Dušek, J., Tesař, M. et al. Heterogeneity of water flow in grassland soil during irrigation experiment. Biologia 69, 1555–1561 (2014). https://doi.org/10.2478/s11756-014-0467-4
- degree of preferential flow
- effective cross section
- infiltration experiment
- radioactive tracer technique
- sandy soil