大通湖高锰酸钾指数的时空变化

From July 2016 to March 2017, the permanganate index of 18 monitoring samples in the Datong Lake water body was monitored and analyzed in four quarters. The results showed that the average concentration of the permanganate index (CODMn) in the whole lake was the highest in summer in Datong Lake, reaching 5.07 mg/L, followed by that in autumn, which was 4.41 mg/L, and it was the lowest in winter and spring. The spatial distribution of the annual average value of CODMn in Datong Lake was that the concentration at the lake inlet was significantly higher than that in the central lake area, and the difference in CODMn concentration between the lake inlet and the central lake area was particularly significant during the wet season. In the pollution control and management as well as ecological restoration of Datong Lake, non-point source pollution such as agricultural pollution will be the key point of pollution prevention and control.

2016 年7 月至2017 年3 月分四个季度对大通湖水体18 个监测样点的高锰酸钾指数进行监测和分析。.结果表明, 大通湖夏季高锰酸钾指数(CODMn)全湖平均浓度最高, 可达5.07 mg/L, 秋季次之, 为4.41 mg/L,.冬季和春季最低。大通湖CODMn 全年均值的空间分布为入湖口显著高于湖心区, 在丰水期入湖口和湖心区的.CODMn 浓度差异尤为显著。在大通湖污染控制和管理以及生态修复中, 农业污染等非点源污染将是污染防控.重点。