大亚湾沉积物中137Cs的环境容量研究

参照水、土壤环境容量研究方法，提出沉积物环境容量的定义，并根据系统中物质平衡理论建立模型，对大亚湾沉积物中的^137Cs环境容量进行了研究，计算了大亚湾内表层沉积物中^137Cs的静容量，并选择代表性生物，计算了近岸区的年动容量和总动容量。结果表明，计算得出的环境容量接近于目前沉积物中^137Cs年输入量，在控制年限内，将沉积物的输入量控制在该环境容量范围内，是大亚湾沉积物生态系统维持目前状态，不会出现明显恶化的保证。

Study on Sediment Environmental Capacity of 137Cs in Daya Bay

Based on the methodology of study on water, soil environmental capacity and mass conservation theory in a system, the concept and model on sediment environmental capacity for ~(137)Cs in Daya Bay are developed. The static capacity for ~(137)Cs in upper layer of sediment near shore at shallow area is calculated, and the annual dynamic capacity and total dynamic capacity are given through determination of typical biomass in the sediment. The results show that the estimated environmental capacity for ~(137)Cs in sediments is approximately equal to current input of ~(137)Cs into the sediments, and to control the input of ~(137)Cs in the sediments within the environmental capacity is the guarantee for sustaining of current situation of Daya Bay eco-system and avoiding of obvious degradation of the eco-system.