河湖污染底泥环保疏浚设计深度研究

生态清淤作为湖泊底泥污染治理的重要手段已取得共识,但清淤深度设计并无统一标准。针对此问题,以某工程为例,分析底泥受到的污染情况,对比常用的清淤计算方法包括沉积学法、背景值法、拐点法和分层释放速率法,提出污染过渡层清除程度综合系数K,改进了生态清淤深度设计方法。可以将该设计方法推广到整个工程区进行疏浚深度设计,既减少大规模实验室分析的工作量、降低工程研究费用,又便于应用在工程设计中。

Study on environmental dredging depth of polluted sediment in lakes and rivers

Ecological dredging has gained some consensus as an important mean of lake sediment pollution treatment.But there is no uniform standard for dredging depth design.Taking a project as an example,we analyze the polluted sediment and compare common methods including sedimentology,background value,inflection point and stratified release rate method,suggest a comprehensive coefficient K for the clearance degree of pollution transition layer to improve the dredging design method.This design method can be extended to the entire engineering area for the environmental dredging depth design.It will not only reduce the work of large-scale laboratory analysis and the cost of engineering research,but also is more convenient for application in the engineering design.