【摘要】 城市合流排水管道中水沉积物界面物质在雨水径流的冲刷作用下会将其中的污染物重新释放排入受纳水体,成为水体面源污染的重要来源。综述国内外对水沉积物界面物质的组成、污染特性及模型模拟方面的研究进展。将水沉积物界面污染物分成有机层、近床固体层和流动泥沙层,其中有机层和近床固体层有较高的有机物含量和含水量,流动泥沙层含有较多的挥发性物质。研究表明:水沉积物界面物质抗侵蚀性微弱,含水量是影响其剪应力的最重要因素;已有水沉积物界面的模型模拟研究主要集中在利用模型预测近床固体对初期冲刷的污染贡献、有机层的污染物侵蚀量和近床固体层的生物降解量等。认为今后应加强对水沉积物界面污染特性的研究,建立适合本地的水沉积物界面污染贡献模型。更多还原

【Abstract】 Pollutant from sediment in the combined drainage pipes has been a main source of the non-point source pollution for the receiving water.Hence,it is of great importance to study the action of the pollutant from the water-sediment interface.The composition of the water-sediment interface,the pollutant characteristics,and the simulation model of the interface of the water-sediment were reviewed.The water-sediment interface pollutant can be divided into the organic layer,the near-bed solid layer and the fluid sediment layer.Both the organic layer and the near-bead solid layer have relatively high organic content and high water content,while the fluid sediment layer has high concentration of volatile matter.It can be concluded that the erosion resistance of the water-sediment interface pollutant is weak,and the water content is the main factor which affects the shear stress of the water-sediment interface.Besides,the existing research on model simulation of the water-sediment interface mainly focuses on predicting the contribution of the near-bed solid on the initial flushing,the pollutant erosion of the organic layer,and the biological degradation of the near-bed solid layer.It is advised that the pollutant characteristics of the water-sediment interface needs further study,and the local water-sediment interface pollution contribution model needs to be established.更多还原