抚仙湖入湖河流东大河水质评价及其对降雨量的响应研究

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英文篇名：Water Quality Evaluation of Dongda River in Fuxian Lake and Its Response to Rainfall 作者：华春莉 ; 王应武 英文作者：HUA Chun-li;WANG Ying-wu;Yunnan Institute of Water Hydropower Engineering Investigation,Design and Research; 关键词：入湖河流 ; 水质评价 ; 降雨 ; 响应研究 ; 东大河 ; 抚仙湖 英文关键词：riverflowing into lake;;water quality evaluation;;rainfall;;response study;;Dongda River;;Fuxian Lake 中文刊名：YNHK 英文刊名：Environmental Science Survey 机构：云南省水利水电勘测设计研究院; 出版日期：2019-04-02 出版单位：环境科学导刊 年：2019 期：v.38;No.185 语种：中文; 页：YNHK201902018 页数：5 CN：02 ISSN：53-1205/X 分类号：77-81

摘要

利用模糊综合评价模型对抚仙湖最大的入湖河流东大河2013年水质的7个重要污染因子进行了评价,并结合当地降雨资料,分析了东大河水体中污染物的时间变化特征及其对降雨的响应。结果表明,东大河水质除2月、10月和12月外,长期稳定在Ⅴ类,主要污染因子为TN和BOD_5。水体中TN、DO受降雨强度的影响大于TP、COD_(Mn);TN浓度在小雨事件下浓度较低,在中雨和大雨事件时浓度逐渐升高;降雨能增加水体中的DO,提高水体的自净能力。
        Dongda River was one important tributary of Fuxian Lake. Seven Water quality pollution factors of theriver were evaluated using a fuzzy comprehensive assessment model as well as its response to Rainfall based on the rainfall observation data.The results showed that the water quality of theriver has been stable in the fifth category for a long time, and the main pollution factors were TN and BOD_5all the year round other than February, October and December.The influence of rainfall intensity on TN and DO in water was greater than TP and COD_(Mn). The concentration of TN was lower at light rain events and gradually increased during moderate rain and heavy rain events.Rainfall would increase the concentration of DO in the water body, which improved the self-purification ability of the water body.

引文

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