With anthropogenic activities, the persistent organic pollutants (POPs) accumulated in estuary has been notably concern but the influences of complex hydrodynamic conditions on the fate of POPs in estuary have not fully understood. In this study, the bottom velocity and the concentration of suspended sediment in the Yangtze River Estuary (YRE) were determined using the Acoustic Doppler Current Profiler (ADCP), while the concentration of three typical POPs with distinguishing properties, including polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and organichlorine pesticides (OCPs), were determined simultaneously. Then three nonlinear equations were determined for identifying the hotspots of PCBs, OCPs and PAHs in the YRE. The results indicated the goodness-of-fitting of these three equations were satisfactory, indicating the bottom velocity and the suspended sediment level could be used as the reference factor of POPs. For the YRE, the north branch, the upstream of the north branch, and the mouth of the YRE are identified as the hotspots of PCBs, PAHs and OCPs, especially in the normal, flood and dry season, respectively. Simple structure and easy data availability make the results and methods presented in this paper to be easily used as a reference for POPs studies in other regions.

随着人为活动的影响，河口累积的持久性有机污染物（POPs）受到了特别关注，但复杂的水动力条件对河口持久性有机污染物的命运的影响尚未得到充分认识。在这项研究中，使用声学多普勒电流剖面仪（ADCP）确定了长江口（YRE）的底速和悬浮沉积物的浓度，同时使用了具有区别性的三种典型POPs的浓度，包括多氯联苯（PCBs）同时测定了多环芳烃（PAH）和有机氯农药（OCP）。然后确定了三个非线性方程，用于识别YRE中的PCB，OCP和PAH热点。结果表明，这三个方程的拟合优度令人满意，指示底部速度和悬浮泥沙水平可以用作持久性有机污染物的参考因子。对于YRE，北分支，北分支的上游和YRE的入口被确定为多氯联苯，多环芳烃和OCP的热点，特别是在正常，洪水和干旱季节。简单的结构和容易获得的数据使本文中介绍的结果和方法易于用作其他地区持久性有机污染物研究的参考。