跌水结构参数对水中溶解氧含量的影响  被引量:1

Effects of waterfall structural parameters on dissolved oxygen in water

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作  者:晁亮 王文娥[1] 胡笑涛[1] CHAO Liang;WANG Wen’e;HU Xiaotao(Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education,Northwest A&F University,Yangling 712100,China)

机构地区:[1]西北农林科技大学旱区农业工程教育部重点实验室,陕西杨凌712100

出  处:《环境保护科学》2021年第2期71-75,共5页Environmental Protection Science

基  金:“十三五”国家重点研发计划(2016YFC0400203);陕西省自然科学基金(2020JM-166)。

摘  要:文章通过对不同高度、宽度和水垫深度等跌水结构参数进行比较,分析了不同流量下跌水结构参数与跌水水流形态、水中溶解氧含量变化的关系。结果表明:水流脱离跌坎后,在空中跌落过程中会形成水幕状或汇聚为水柱状,相同流量下,水幕状跌水溶解氧含量增加量大于水柱状;随着跌水流量、高度及宽度的增加,跌水曝气的充氧能力显著变大,但随着跌水水垫深度的增加而减少。The article analyzes the relationship among the waterfall structure parameters with the different flow capacity and the water flow shape as well as the dissolved oxygen content in the water by comparing the water cushion structure with different height,width and depth.The results show that the water flow will form a water curtain or converge into a water column in the process of falling in the air after escaping from the falling sill.Under the same flow capacity,the increased dissolved oxygen content in the water curtain is greater than that in the water column.With the increasing of the waterfall flow capacity,height and width,the oxygenation of the waterfall aeration improves significantly.On the other hand,the oxygenation decreases with the increasing of the waterfall cushion depth.

关 键 词:跌水曝气 溶解氧 结构参数 

分 类 号:X703.1[环境科学与工程—环境工程]

 

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