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密西西比北部三个流域内土壤中放射性~(137)C_s 的运动与通用土壤流失方程所计算的潜在土壤流失成对数关系(r=0.89)。分析其它关于~(137)C_s 的出版资料以及密西西比北部的资料也表明在土壤流失量及土壤中~(137)C_s 流失量之间存在着明显的对数关系。本研究成果表明,可以根据流域中放射性微粒~(137)C_s 的运动来计算土壤流失量;也有可能通过土壤侵蚀资料象~(137)C_s 一样计算流域中表面吸附养分的运动。
The movement of radioactive 137 C_s in the soil in the three watersheds of northern Mississippi was logarithmically related to the potential soil loss calculated by the generalized soil loss equation (r = 0.89). Analysis of other published data on ~ (137) C_s and northern Mississippi also shows a clear logarithmic relationship between soil loss and soil 137 C_s loss. The results of this study indicate that soil loss can be calculated based on the movement of radioactive particles 137 C_s in the river basin. It is also possible to calculate the movement of surface-absorbed nutrients in the watershed by the same data as soil 137 C_s.