【摘要】 137Cs区域本底值的确定是应用137Cs法研究土壤侵蚀的首要问题。本文利用Walling和He的137Cs本底值计算模型和软件对中国137Cs本底值区域分布进行了模拟计算。结合前人对中国不同区域137Cs本底值的研究结果,将各区域137Cs实测本底值同模拟值进行比较,指出了模拟结果存在的主要问题,在此基础上讨论了中国137Cs本底值的区域分布特点和影响中国137Cs区域本底值的主要因素。更多还原

【Abstract】 Acquiring the 137Cs reference inventory values is the first step for using 137Cs technique to estimate rates of soil erosion and sediment deposition. The 137Cs reference inventories distribution in China is calculated in this paper by using the model and software of the fallout 137Cs reference inventory, which is established by Walling and He. The modeling results are compared with the measured 137Cs reference inventories in China, and then some defects of the Walling and He’s model of the fallout 137Cs reference inventory are indicated. In this paper, the 137Cs reference inventories distribution pattern of China and the major influence factors are analyzed too.更多还原