| Cite this article: | 宁忠瑞,李虹彬.基于水质标识指数的黄河宁夏段水质评价与分析[J].灌溉排水学报,2020,(6):-. |
| NING Zhongrui,LI Hongbin.基于水质标识指数的黄河宁夏段水质评价与分析[J].灌溉排水学报,2020,(6):-. |
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| Assessment and analysis of Water Quality source in Ningxia Section of the Yellow River Based on Comprehesive Water Quality Identification Index |
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NING Zhongrui, LI Hongbin
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College of Hydrology and Water Resources, Hohai University
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| Abstract: |
| 【Objective】 To understand the temporal and spatial variation of water quality along the Ningxia section of the Yellow River. 【Method】 Based on the data of 6 national water quality monitoring stations and 3 hydrological stations in the Ningxia section of the main stream of the Yellow River, the statistical analysis method was used to divide the hydrological period (high water period, flat water period and low water period) . Using the Principal Component Analysis method screens the water quality indicators that have a representative effect on the quality of the water body, and uses Comprehesive Water Quality Identification Index Method to analyze the grouped results, and ranks them according to the "Surface Water Quality Evaluation Standard" (GB3838-2002). 【Results】 ① The main water pollution indicators of the Ningxia section of the Yellow River are organic non-toxic and phytonutrient (nitrogen, phosphorus) pollutants, and the indicators that have a representative effect on the water quality are BOD5, COD, CODMn, and non-point source pollutants NH4+- N, TN; ② The quality of the main stream of the Ningxia section of the Yellow River is Class I-II water, which meets the Class III water indicators of the secondary protection areas for surface water sources of centralized drinking water and industrial and agricultural water requirements; ③ The water quality gradually increases from upstream to downstream Deterioration trend, of which Mahuanggou water pollution is the most serious; ④The water quality of the river basin during dry season is obviously inferior to the water quality during wet season. Water supply and drainage in winter and spring should pay more attention to water quality test results. 【Conclusion】Agricultural non-point source pollutants are the main water pollutants in the Ningxia section of the Yellow River. When returning agricultural water, especially in the winter and spring seasons, attention should be paid to the ecological impact on the main stream of the Yellow River. |
| Key words: Principal Component Analysis; Comprehesive Water Quality Identification Index; Ningxia Section of the Yellow River; Water Quality Assessment; Temporal and Spatial Changes |
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