| Ecological environment protection and high-quality development in the Yellow River basin has been upgraded as a national strategy and is very significant for carrying out water pollution risk zoning assessment in the Yellow River basin. Most of the existing studies focus on the risk zoning of emergency water pollution, and there are few cases of cumulative water pollution risk zoning assessment. Emergency and cumulative water pollution risk zoning of the Yellow River basin in 2019 was identified and assessed based on environmental statistical data, DEM data, water quality monitoring data, and basic geographic data, with a 1 km×1 km grid as the basic unit. The results showed that:① the area of emergency high-risk area in the Yellow River basin was 1349 km2, accounting for 0.2% of total area, and the area with relatively high risk was 3864 km2, accounting for 0.5%. The cumulative high-risk area was 5834 km2, accounting for 0.7%, and the relatively high-risk area was 25382 km2, accounting for 3.1%. ② Some areas such as Lanzhou, Wuhai, Bayannur, Baotou, Baoji, Ji'nan, and Dongying had both high emergency and cumulative environmental risks. ③ From the distribution of the main stream perspective, the Lanzhou section, Baiyin section, Zhongwei section, Wuhai section, Bayannur section, Zhengzhou section, Dezhou section, and Dongying section had high emergency and cumulative environmental risks. |
