The accumulation of heavy metals from sewage drainage in the estuary is not serious because of, partly, large silt discharge and high sedimentation rate.
河口重金属的积累，相对来说并不严重这与输沙量大及高沉积速率有关。
2
It is very important to establish a long-term monitoring and investigation on remigration of heavy metals after their accumulation and sedimentation in littoral bay areas.