不同生态复氧方式对城市河流溶解氧影响研究  

Study on the influence of different ecological reoxygenation modes on dissolved oxygen in urban rivers

作　　者：赵文博 解永新 于英潭 王首鹏 张朝星[2] 王俭[2] ZHAO Wen-bo;XIE Yong-xin;YU Ying-tan;WANG Shou-peng;ZHANG Chao-xing;WANG Jian(Benxi City New District Development and Construction Management Office,Benxi 117000,China;College of Environment,Liaoning University,Shenyang 110036,China).)

机构地区：[1]本溪市城市新区开发建设管理办公室,辽宁本溪117000 [2]辽宁大学环境学院,辽宁沈阳110036

出　　处：《环境生态学》2019年第3期61-66,共6页Environmental Ecology

基　　金：水体污染控制与治理科技重大专项课题(2015ZX07202-012)资助

摘　　要：由于工业废水和城市生活污水的大量排放,以及河道截弯取直破坏了河流原有的自然形态,导致部分城市河流污染严重、溶解氧含量偏低、自净能力减弱。而较高的溶解氧浓度对河流自净能力提升及水质改善具有十分重要的意义。有效利用河流原本具有的能量,采用生态复氧的方式实现河流溶解氧含量提升、增强城市污染水体自净能力是既经济又切实可行的一种途径。为此开展了不同生态复氧方式对河流溶解氧影响的试验研究。结果表明:(1)在初始溶解氧浓度相同的情况下,不同方式的复氧效果排序为:潜坝>丁坝>跌水;(2)在初始溶解氧浓度不同的情况下,初始溶解氧浓度越低,水流经过不同复氧装置的溶解氧增量越大,增量大小排序为:潜坝>跌水>丁坝;(3)深潭-浅滩结构复氧效果明显优于单独的丁坝、潜坝,且多个深潭-浅滩结构间距为1倍河宽时,溶解氧的含量处于持续增加状态,且增量相对较大,复氧效果较好。Due to the large amount of industrial wastewater and municipal domestic wastewater discharged,as well as the river cut-off straight destroyed the original natural form of the river,resulting in serious pollution of some urban rivers,low dissolved oxygen content,and reduced self-purification capacity.The higher dissolved oxygen concentration is of great significance to the improvement of river self-purification capacity and water quality.It is an economical and practical way to effectively utilize the original energy of rivers and to enhance the dissolved oxygen content of rivers and enhance the self-purification ability of polluted water bodies in cities by means of ecological reoxygenation.In order to solve this problem,the effects of different ecological reoxygenation methods on dissolved oxygen in rivers were studied.The results show that:(1)when the initial dissolved oxygen concentration is the same,the reoxygenation effect of different ways is ranked as:submerged dam>spur dike>water fall;(2)when the initial dissolved oxygen concentration is different,the lower the initial dissolved oxygen concentration,the greater the dissolved oxygen increment of water passing through different reoxygenation devices,and the order of the increment is:submerged dam>water fall>spur dike;(3)deep pool-shallow structure reoxygenation.The effect is obviously better than that of single spur dikes and submerged dams.When the spacing between deep pools and shallows is 1 times the river width,the dissolved oxygen content is continuously increasing,and the increment is relatively large,and the effect of reoxygenation is better.

关 键 词：生态复氧 溶解氧 潜坝 丁坝 深潭-浅滩 

分 类 号：X522[环境科学与工程—环境工程]