Monitoring Analysis Of Water Quality Of Shallow Channel Between Tonglu And Qibao Reaches In Qiantang River And Experimental Study Of Side Discharge

By using multi-parameter water quality sonde, Flow Tracker ADV and other sophisticated measuring instruments, the water quality between Tonglu and Qibao reaches in Qiantang River was real-time monitored and analyzed. At the same time, the collection of water samples was doing further analysis in the lab; In addition, the side discharge was experimentally studied in a flume. This thesis mainly includes:Water quality data were obtained through the monitoring in Qiantang River between Tonglu and Qibao reaches.The data such as Dissolved Oxygen> Chlorophyll and Blue-green Algae was obtained by using Multi-parameter water quality sonde.Velocity data were obtained by using Flow Tracker ADV. Ammonia-N, Nitrate-N, Total Phosphorus of water quality and Total Carbon, Total Nitrogen, Total Phosphorus of sediment were obtained in the lab. The water quality distribution law along the river and its correlation of the data between Tonglu and Qibao reaches in Qiantang River were given. Water quality of Qiantang River was evaluated by using three methods of evaluation, which is single factor water quality identification index method, comprehensive water quality assessment method and Nemerow index method. The results of the evaluation of the water environment could provid scientific basis for relevant departments. Three kinds of side discharge including static condition, flow condition and wave condition were designed in the lab. The flow field distribution was measured by using Micro ADV. The flow field vector diagram was drawn by using matlab. By comparing the three kinds of flow field, the diffusion law of pollutants was explored, and the discharge method which conducive to sewage diffusion was found out at last.