The community structure of macro - invertebrates became simple with the sediment pollution getting heavier 随着底质污染的加重,群落结构趋于简化。
Similar sediment pollution scenarios are occurring in the headwaters of the salween and yangtze rivers 在萨尔温江和长江上游也存在类似的泥沙污染状况。
Few groups , including environmentalists , nongovernmental organizations , international donors and government agencies , clearly see the magnitude of the problems associated with sediment pollution from mountain roads 包括环保主义者、非政府组织、捐助国和政府机构在内的少数团体清楚地看出了山路建设带来的泥沙污染问题的程度。
The current situation of sediment pollution in li canal was introduced in this article . with individual and nemerow index evaluation methods , the sediment pollution by heavy metals was analyzed systematically , and pollution control measures were put forward 介绍了淮安市里运河底质污染的现状,运用单项和内梅罗指数评价方法系统地对里运河底质中重金属污染状况进行了分析研究,并提出了污染防治措施。
The main contents related to the scheme were introduced as follows : the characteristics and status of sediment pollution , the determination of the range , the depth , and the scale of sediment dredging projects , the treatment of dredged sediment , the disposal of the remaining water , etc 详细阐述了该方案涉及的主要内容:底泥污染特性及污染状况分析,疏浚平面范围、疏浚深度及疏浚工程规模的确定,疏浚底泥处置及余水处理等。