| 英文摘要 |
This project aims to consolidate background data on river basin water quality, precipitation, population, industries, and livestock in the city. By utilizing Geographic Information Systems (GIS), drones, and water quality models, it explores the temporal and spatial variations in basin pollution composition and river water quality. The goal is to identify key pollution sources, essential water quality indicators, and critical river segments. In terms of pollution composition in the city's basins, apart from the Erren River, where livestock farming is intensive and livestock pollution prevails, and the Agongdian River basin, where metal surface treatment and electroplating industries are prominent and industrial pollution prevails, most basins are primarily affected by incomplete sewage management, with domestic pollution being the main water quality issue. Looking at the Rate of Pollution Intensity (RPI) severe pollution station ratio, it has decreased from 22% in 2018 to 15% currently (2023). Only the Agongdian River, Dianbao River, and Houjin River show deterioration, indicating a significant improvement in basin water quality and the environment in recent years. This progress dispels the impression of foul odors and pollution, serving as supporting evidence that strengthens public perception.
Furthermore, through the analysis of basin pollution source data, key industries are identified for inspection and guidance. Initiatives such as pollution negotiations are implemented to achieve crucial reductions in ammonia nitrogen.6 surveillance devices are strategically placed in key river sections and areas of public concern to monitor changes in the river environment.
Based on the analysis of pollution composition in each basin, water quality improvement strategies are proposed. For the Erren River, resource-oriented measures are recommended. In the case of the Agongdian River downstream, the focus is on watercourse construction and resource-oriented measures, with plans to enforce stricter discharge standards for the Agongdian River in the future. Dianbao River may consider accelerating the takeover in the Qiaotou area and promoting local treatment facilities as an alternative before the takeover. For Houjin River downstream, construction and resource-oriented measures are prioritized, and the current initiative involves implementing a total quantity control policy for industries. For Love River, continuous user takeover for domestic pollution is suggested, along with proper operation of existing water purification facilities. Fongshan River should not only continue sewage system construction but also address upstream polluted drainage by diverting it to existing or newly established water treatment plants. In the case of Yanshuei River, besides ongoing sewage system construction, the establishment of local treatment facilities as an alternative before sewage system takeover is recommended. Enhancing the functionality of upstream ecological wetlands is also advised. Regarding Gaoping River, an accelerated takeover of users in upstream non-managed areas for domestic pollution is suggested, and the evaluation of decentralized sewage treatment facilities is proposed. To address livestock pollution, expediting resource matchmaking counseling to reduce livestock wastewater discharge is recommended.
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