Study On The Security Of Water Quality And Application For Long Distance Water Diversion Project

In recent years, the government makes greater efforts to protect water environment and prevent water pollution. It is critical that the security of water quality of water diversion project ensures the people's drinking water security, which has not been solved by now. The author participated in the process of developing the water conservation project management information system of Luan River-Tianjin water diversion project. The certain important questions of the security of water quality of long distance water diversion project were analyzed. The main study results are as follows:Based on the summarizing the characters of long distance water diversion project and studying on water quality status, the paper presents the concept of the security of water quality of long distance water diversion project. The concept points out that not only the water quality in the water source and water diversion route should meet the standard, it should also consider the influence of the diversion project on the ecological environment of the basin. Finally, it means life safety in the water supply and reception region and manifests the person and the nature harmonious development.By combining with river and reservoir water quality model and water quality evaluation model, the paper established the security of water quality of water diversion project model. Taking Luan River-Tianjin water diversion project as an example, the paper analyze hydrographic and water quality data of last twenty years. Based on the model verification, the security of water quality of Luan River-Tianjin water diversion project model can simulate and predict the water quality of section along the water diversion route more precisely.Based on the security of water quality of Luan River-Tianjin water diversion project model, the secure problem of water quality was solved. For instance, study on the pollutant sluicing in the Li-river, the problem of water quality of inflow of Yuqiao reservoir on the initial period of water diversion worse than the still water was solved. The model simulated and predicted the water quality, evaluated eutrophication of Yuqiao reservoir and warned danger. The non-point pollution sources were controlled by simulating the influence of non-point pollution sources by flood flow of Yuqiao reservoir. By simulating and predicting the water pollution emergency, the pollutant diffusion velocity and the influence of pollution in downstream were accurately calculated. It provides scientific foundation for making the response and taking measures promptly.Based on the security of water quality of Luan River-Tianjin water diversion project model, combined with internet, computer, database, communication and 3S technology, water resource management of Luan River-Tianjin water diversion project was developed. It provides valuable experience for other diversion project.