Soil erosion processes and nutrient loss, 1. The interpretation of enrichment ratio and nitrogen loss in runoff sediment.
1990
Palis R.G. | Okwach G. | Rose C.W. | Saffigna P.G.
A new analytical framework is described and tested using data obtained from a tilted flume simulated-rainfall facility. It was shown that the ration of nutrient content in eroded sediment to that in the original soil (the enrichment ratio, E) could be interpreted from the product of 2 component distributions: the concentration of sediment as a function of sediment size; and N concentration as a function of size. Time variation in E was largely due to time variation in the first component distribution. Values of E different from unity require some variation with sediment size (or settling velocity) in the concentration of the nutrient sorbed to the soil or closely associated with the soil organic matter. The more that rainfall detachment dominates runoff erosion as the major erosion process, the more likely it is that E is greater than unity.
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