Behaviors of soil loss in slope-lysimeter, 1: Rainfall and erosion on bare slope, autumn, 1988
1990
Nagasawa, T. (Hokkaido Univ., Sapporo (Japan). Faculty of Agriculture) | Umeda, Y. | Inoue, T. | Li, L.
The experiment on behaviors of soil loss and surface runoff from bare slope was carried out with slope-lysimeter at Experimental Farm of Hokkaido University in autumn, 1988. Soil loss and surface runoff were observed with every rainfall or every hour through a rainfall. The relationship between characteristics of rainfall, soil loss and surface runoff was analyzed and discussed based upon the USLE and the conclusions were drawn as follows: 1) Rainfall factors, EI values with peak rainfall intensities of various periods have a correlation with soil loss and there is a tendency the shorter the period of rainfall intensity the better correlation between them. 2) Surface runoff has a correlation with EI value better than peak rainfall intensity and there is a tendency the shorter the period of rainfall intensity the better correlation with them, and also there is a high correlation with surface runoff and soil loss. 3) Behaviors of runoff and soil loss were changing with time process of the rainfall and the soil erodibility was increased with the time throughout the rainfall
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