Study on Water Quality Changes During Dredging Hongkou Port River System
Through the tracking and monitoring study of the whole dredging process of five rivers in Hongkou Port river system,the study shows that the monitoring factors of water quality in the monitoring section fluctuate during the dredging operation period.During the dredging operation,the water quality category does not change significantly,and the diffusion is fast.After the completion of construction,the water quality data is basically close to the index value before dredging after 3 days of settlement and self-purification of river water dilution.The water quality gradually recovered at 10 meters downstream,and basically returned to the initial state at 20 meters downstream.In addition,during different stages of dredging,the impact time of COD and NH3-N in water quali-ty was relatively short,while the impact of TP began to weaken only one hour after the end of the operation.
river dredgingwater qualityCODammonia nitrogentotal phosphorus
NETL
NSTL
万方数据
维普
