设为首页 加入收藏 登录旧版
右江百色水库下游断面低溶解氧形成原因分析
Cause Analysis of Low Dissolved Oxygen Formation in Downstream Section of Baise Reservoir in Youjiang River
投稿时间:2022-04-08  修订日期:2022-06-11
DOI:DOI:10.19316/j.issn.1002-6002.2022.04.15
中文关键词:  右江流域  水库热分层  低溶解氧  自然因素
英文关键词:the Youjiang Basin  reservoir thermal stratification  low dissolved oxygen  natural factors
基金项目:
作者单位
李昆明 广西壮族自治区生态环境监测中心, 广西 南宁 530025 
孟凡生* 中国环境科学研究院, 北京 100012 
张铃松 中国环境科学研究院, 北京 100012 
林卉 广西壮族自治区生态环境监测中心, 广西 南宁 530025 
黄伯当 广西壮族自治区生态环境监测中心, 广西 南宁 530025 
张家胜 中国环境科学研究院, 北京 100012 
通讯作者:孟凡生*  中国环境科学研究院, 北京 100012  
摘要点击次数: 360
全文下载次数: 17
中文摘要:
      广西右江东笋断面溶解氧(DO)呈现5—11月浓度较低,12月及1—4月浓度较高的变化规律。从水温、藻类呼吸、沉积物耗氧、有机物耗氧、上游来水等方面分析了东笋断面低DO形成的原因。结果表明,5—11月东笋断面DO浓度较低,主要是受夏季高温和水利工程运行等非污染型因素的影响。右江流域夏秋季水温较高,限制了水体DO浓度的上限。热分层现象导致百色水库中层水体DO浓度较低,而水利枢纽发电时的下泄水正是中层水体,因此,下泄水DO浓度低是导致5—11月东笋断面DO浓度低的主要原因。东笋河段沉积物和有机物耗氧对DO浓度的影响很小,藻类呼吸作用对DO浓度的影响有限。
英文摘要:
      The dissolved oxygen (DO) concentration of Dongsun section in Guangxi Youjiang River follows the pattern of a lower concentration from May to November,a higher one from December to the following April.This paper analyzes the causes of low DO formation in Dongsun section from the aspects of water temperature,algae respiration,sediment oxygen consumption,organic matter oxygen consumption and upstream water.The results show that the low DO in Dongsun section from May to November is mainly caused by non-polluting factors such as high temperature in summer and water conservancy project operation.The high water temperature in summer and autumn in the Youjiang Basin limits the upper limit of DO concentration in water.Thermal stratification leads to low DO concentration in the middle layers of the Baise reservoir,which is used for power generation,and the low DO concentration in the discharge water is the main reason for the low DO concentration in Dongsun section from May to November.The sediment and organic matter consumption have little effect on DO concentration in Dongsun section,and algal respiration has a limited effect on DO concentration.
查看全文  查看/发表评论  下载PDF阅读器