The accumulation of heavy metals from sewage drainage in the estuary is not serious because of, partly, large siltdischarge 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
Coastal geologic environment of China is characterized by strong tectonic activities, huge siltdischarge into sea, frequent surges, and prominent artificial environmental features.
我国海岸带地质环境，具有构造活动性强、入海泥沙大、多风暴潮、人工环境非常突出等特征。
3
Man made reservoirs and sand excavation in some rivers reduce siltdischarge into sea, these human activities are vital factors that cause coast erosion hazard in Qinhuangdao region recently.