表层沉积物中磷释放对水体水质影响

The influence of phosphorus release from surface sediments on water quality

在外源磷污染逐步得到控制后,表层沉积物作为内源磷污染的主体,对水体水质的影响作用日益凸显。随着人类活动干扰的加剧,表层沉积物中磷的释放增加了包括河流在内的各类型水体发生富营养化的机率。黄河甘宁蒙段较为密集的闸坝数量、频繁的河道清淤疏浚工程以及水量在年内的不均匀分配,增大了区域内表层沉积物中磷的释放风险。掌握表层沉积物-水界面之间磷的交换行为对水环境的治理和磷负荷的调控具有重要的意义。

With the controlling of the external phosphorus pollution,the surface sediments become the main source of the internal phosphorus pollution and have an increasingly prominent impact on the water quality.Because of the intensification of human activities,the phosphorus release from the surface sediments increases the probability of water eutrophication for all kinds of water bodies,including the rivers.The risk of phosphorus release from the surface sediments is increased due to the intensive dams,the frequent river dredging and the uneven distribution of the water flow during the year among the Gansu,Ningxia and Inner Mongolia sections of the Yellow River.It is significant to understand the exchange behavior of phosphorus between the surface sediment and the overlying water for the treatment of water environment and the regulation of the phosphorus load.