Calculation of pollutant flux of the Qiantang River based on ADCP

摘要

Using the Acoustic Doppler Current Profiler (ADCP), the authors try to measure the pollutant flux of key sections of the Qiantang River in the dry season by real time monitoring, to find its temporal and spatial distribution Six monitoring sections along the Qiantang River were selected and located by GPS,, Three water samples were taken from the surface to the bottom in each monitoring section. According to the flow data obtained with ADCP and the pollutant concentration data analysed, the pollutant fluxes of the six sections in the Qiantang River were calculated. The research showed that the maximum pollutant flux was in Yanlingwu, regardless of the magnitudes of CODMII, NH3-N or TP, in the dry season of 2005. The minimum pollutant flux was observed in the Xin'an River factory section. Detailed analysis showed that the Lan River contributes considerably to the pollutants of the Yanlingwu section,. Therefore, urgent effective measures are required to control the pollution in the Lan River estuary and Yanlingwu sections.