In this paper the author makes an attempt on qualitative explanation of particular runoff phenomenon in Oze-Hara during snow cover weighted period by Terzerghi's concept of clay expansion.
About 1/7 of the area of Oze Hora basin (70km
2) is occupied by the moor, which consists of deep loam with much field moisture equivalent, measured as 7080% at almost all points in Summer season.
Increase and decrease of snow cover weight will bring the expansion and skrinrage of loams and change its field moisture equivalent, and consequently result in particular runoff from the basin.
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