潭江泗合水流域降雨径流非点源污染特征分析
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TV122

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国家自然科学基金(51209096);中央高校基本科研业务费专项(2015ZM110)


Analysis of characteristics of non-point source pollution in rainfall-runoff process in Siheshui Watershed of Tanjiang Valley
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    摘要:

    以广东省江门市潭江泗合水流域为研究对象,对2014年5月两场降雨事件的水质、水量进行同步监测,研究降雨径流条件下非点源污染物的输出机理和时空变化规律。结果表明:BOD5、TN和TP表现出明显的初期冲刷效应;输出污染物中可溶性磷占TP比例较大,NH3-N在径流前半段表现出初期冲刷效应,后半段其质量浓度与径流量呈负相关关系;CODMn质量浓度呈波浪锯齿状变化,后期质量浓度变化受到壤中流主导退水过程的影响;各污染物通量变化趋势和径流量变化趋势大体相同,两者相关性显著;各污染物的输出质量浓度与TSS输出质量浓度无明显的相关性,表明悬浮物对其他污染物输出质量浓度的贡献相对较小。最后,根据实验结果以及实践经验提出流域管理建议。

    Abstract:

    The Siheshui Watershed of the Tanjiang Valley, located in Jiangmen City, Guangdong Province, was used as the research region. Simultaneous monitoring of water quality and quantity during two rainfall events that occurred in May 2014 was conducted in order to study the characteristics and temporal and spatial variation of non-point pollutant emission in the rainfall-runoff process. The results show that the concentrations of pollutants such as BOD5, TP, and TN were high at the preliminary stage of the rainfall-runoff process, indicating a significant first flush effect. Soluble phosphorus accounted for a large proportion of the total phosphorus. The concentration of ammonia exhibited a first flush effect during the first half of the runoff process, and was negatively correlated with the volume of runoff during the second half of the process. The concentration of CODMn showed a wavy and jagged change trend, and in the later period the concentration was influenced by the water withdrawal process dominated by the interflow. The pollutant flux and the volume of runoff had an approximately identical change trend, and a remarkable correlation between them was detected through statistical analysis. There was no significant correlation between the output concentration of TSS and the concentrations of other pollutants, indicating that the suspended solids made a small contribution to the output concentrations of other pollutants. Based on experimental results and practical experience, recommendations are given for the basin’s management.

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冯麒宇,胡海英,黄国如.潭江泗合水流域降雨径流非点源污染特征分析[J].水资源保护,2016,32(3):143-148.(FENG Qiyu, HU Haiying, HUANG Guoru. Analysis of characteristics of non-point source pollution in rainfall-runoff process in Siheshui Watershed of Tanjiang Valley[J]. Water Resources Protection,2016,32(3):143-148.(in Chinese))

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  • 在线发布日期: 2016-05-25
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