Study On Water Quality Changing Rules And Algal Bloom Formation Mechanism Of Wei Jin River

This paper put Wei Jin River as an example,it tested the river water quality and phytoplankton,and analyzed the river algal bloom to find out which factor is the most important.According to Chlorophyll growing is the dominant factor in water,building water quality model aims to predict the growth of algae.Combined with survey data,it related countermeasures to strengthen the river management and optimize the water quality.The research concluding that after a wide range of rainfall in summer,sewage will flow into the river landscape,the water quality of river will be changed obviously.Indicators of nitrogen,phosphorus and BOD5 will be increased.Part of the river,the water has started to become the stagnant water,even become black and odorous water.Wei Jin River has provided favorable conditions for the algae growth with a high level of nutrition,and there are some "algal bloom" through the lanes.By objective monitoring of the river sediments,nitrogen,phosphorus,heavy metals and organic matter content is relatively high.In the case of deterioration of water quality,sediment often assembles a variety of nutrients,heavy metals and so on.The actual monitoring data,we built up a predictive model associated with the river chlorophyll by BP neural network,and the correlation coefficient between the predicted values and the measured values has exceed 0.99.The initial concentration of TP,p H,nitrate nitrogen,TP and organics are important indicators index,and have a decisive impact on the forecast results.Strengthening sewage management,water trasfer with specific planning,innovative ecological restoration and management technology,improve public participation in river management initiative that can help us improve "algal bloom" and water quality of landscape river.