Analysis and Suggestions on Agricultural Non-Point Source Pollution-Yongchuan District, Chongqing as an Example

Among various types of pollution, agricultural non-point source pollution (AGNPS), as an important component of water pollution, has received significant attention from countries around the world in the past forty years. Especially after the effectiveness of point source pollution prevention and control, AGNPS prevention and control has become an international problem, and the overall research on AGNPS prevention and control has also become a hot topic. The 14th Five Year Plan period is a period of in-depth promotion of AGNPS prevention and control, and China has also conducted many studies on AGNPS in recent decades. This study focuses on research and policies on AGNPS in recent years in China, and summarizes the existing problems in the field of agricultural non-point source, such as the lack of top-down full chain technology and a lack of comprehensive evaluation standards. At the same time, Taking Yongchuan District of Chongqing City as an example, the study analyzed the relationship between the concentration of major pollutants and rainfall, fertilizer and pesticide application, planting and livestock breeding in the Zhu Tuo section of AGNPS. Finally, the factors that need to be focused on controlling AGNPS are proposed, and the governance work should be carried out based on the full chain technology of monitoring, tracing, calculation, governance, and management. The study proposes that the entire system of AGNPS needs to be improved and targeted policies should be introduced in order to provide basic support for the control of AGNPS, thereby improving the ecological environment and achieving sustainable ecological development.