Study on the Correlation between Saltwater Intrusion and Influencing Factors in Qiantang River Estuary
Based on the measured data of salinity,runoff,tide,river channel topography at Qibao,Cangqian and Yanguan stations from 2000 to 2020,the partial correlation analysis method was used to study the correlation between the saltwater intrusion and the influencing factors in a monthly time scale,and the calculation formula of the salinity at Qibao station was fitted.The results show that the chlorinity of each station was negatively correlated with runoff,and positively correlated with tidal range and channel-storage capacity.The correlation at Qibao station and Cangqian station was strong,while the correlation at Yanguan station was weak.The tidal range of each station was significantly positively correlated with the channel-storage capacity,with Qibao station and Cangqian station reaching a strong correlation.The impact of river channel changes on saltwater intrusion in the estuary can be reflected by the tidal range of Qibao station and Cangqian station.The monthly average chlorinity and maximum chlorinity at Qibao station can be quantitatively calculated from their monthly average tidal range,monthly maximum tidal range,and upstream monthly average runoff.The research results can provide reference for the utilization of fresh water resources in the Qiantang River estuary.
salinityrunofftidechannel-storage capacityQiantang River estuary
NETL
NSTL
万方数据
维普
