| 引用本文: | 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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| 摘要: |
| 【目的】对清水河污染历时及变化趋势进行评价,总结得出清水河在研究周期范围内的动态变化规律。【方法】本次水质历时分析采用水文频率计算中广泛使用的皮尔逊三型曲线,选取张家口市清水河2017至2018年间除冬季封河期之外逐月水质数据进行分析,利用Matlab软件编写程序绘制出清水河中各断面中不同污染物浓度的皮尔逊三型曲线,并计算出其各自对应的统计参数,之后根据国家对水体水质的划分等级,计算出清水河在各断面下不同污染物在不同地表水标准限值下累积频率。【结果】通过对比不同断面中在各种水质类别中的累积频率,发现清水河在通过张家口市区段人工橡胶坝区后水质变差。【结论】由于人工橡胶坝中水体流动性变差,水体自净能力变差,需要严格控制上游来水中污染物的含量。 |
| 关键词: 皮尔逊三型曲线;Matlab;清水河;水质动态分析 |
| DOI： |
| 分类号:X824 |
| 基金项目: |
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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 |
