呼和浩特市大黑河汛期水质状况及污染防治对策研究

Research on the water quality status and pollution prevention and control measures of Dahei River during flood season in Hohhot City

为了解大黑河汛期水环境质量状况,基于2023年大黑河大入黄口水质自动站监测数据,将其与降雨量的关系进行了综合分析评价。研究结果表明,汛期降雨对大黑河水质有显著影响,汛期大黑河大入黄口断面总磷、高锰酸盐指数、总氮和氨氮的浓度值与非汛期相比,均显著上升,分别升高157.0%、103.7%、66.0%和36.7%,水质类别也由非汛期的Ⅲ类降为汛期的Ⅴ类。浊度、氨氮、总磷、高锰酸盐指数、总氮等污染物月均浓度值与降水量具有相同的变化趋势。

To understand the water environment quality of Dahei River during the flood season,this study conducted a comprehensive analysis and evaluation based on the monitoring data of the Dahei River's automatic water quality station at the Yellow River estuary in 2023 and its relationship with rainfall.The results indicate that rainfall during the flood season significantly affects the water quality of the Dahei River.The concentration values of total phosphorus,permanganate index,total nitrogen,and ammonia nitrogen at the estuary section of the Dahei River during the flood season increased significantly compared to the non-flood season,with increases of 157.0%,103.7%,66.0%,and 36.7%,respectively.The water quality category has been downgraded from Class III during non-flood seasons to Class V during flood seasons.The monthly average concentration values of pollutants such as turbidity,ammonia nitrogen,total phosphorus,permanganate index,and total nitrogen followed the same trend as precipitation.