| Cite this article: | 范宇成,郝桂珍,宋凤芝,等.基于皮尔逊三型曲线的清水河水质历时分析[J].灌溉排水学报,,():-. |
| FAN Yu-cheng,HAO Gui-zhen,SONG Feng-zhi,et al.基于皮尔逊三型曲线的清水河水质历时分析[J].灌溉排水学报,,():-. |
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| Evaluation of Duration of Pollution of Qingshui River Based on Distribution Curve of Pearson Ⅲ |
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FAN Yu-cheng1,2, HAO Gui-zhen1, SONG Feng-zhi1, YUN Jin1, SUN Fan-jiao1
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1.Hebei University Of Architecture;2.P R China
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| Abstract: |
| 【Objective】To evaluate the duration and change trend of Qingshui river pollution, and summarize the dynamic change rule of Qingshui river within the research period.【Method】The water quality of diachronic analysis is widely used in hydrological frequency calculation is adopted to Pearson-Ⅲ curve, the selection of Qingshui river Zhangjiakou except winter freeze-up period between 2017 and 2018 monthly water quality data analysis, using the Matlab software to write out each section of the Qingshui river three type curve of different pollutants concentration in Pearson, and calculate their respective corresponding statistical parameter, then according to the national level of water quality, calculate the Qingshui river in each section under different pollutants under different surface water standard limit cumulative frequency. 【Results】By comparing the cumulative frequencies of different water quality categories in different sections, it was found that the water quality of Qingshui river became worse after passing through the artificial rubber dam area in Zhangjiakou district.【Conclusion】Due to the poor fluidity of water and the poor self-purification ability of water in artificial rubber dam, it is necessary to strictly control the content of pollutants in the upstream water. |
| Key words: Pearson-Ⅲ curve; Matlab; Qingshui river;Dynamic analysis of water quality |
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