Innovative online monitoring system for farmland non-point source pollution enables automated monitoring of continuous cropping farmland
Agricultural non-point source (NPS) pollution is a major cause of water quality degradation, with pollutants such as nitrogen and phosphorus carried by farmland surface runoff being important sources. Statistics show that in 2017, the total nitrogen discharge from agricultural sources in China reached 1.4149 Mt, and total phosphorus was 212 kt. Among these, the nitrogen and phosphorus emissions from cropping alone accounted for 51% and 36% of agricultural source pollutants, respectively. However, current farmland runoff monitoring methods have obvious limitations: traditional runoff pool monitoring has a small ...