溢流坝人工加糙对城市河流复氧力的研究  

Study of spill dam after artificially roughened surface on reaeration capability of urban river

作　　者：程香菊[1] 陈永灿[1] 罗麟[2] 赵文谦[2] 

机构地区：[1]清华大学水利水电工程系,北京100084 [2]四川大学高速水力学国家重点实验室,四川成都610065

出　　处：《哈尔滨工业大学学报》2006年第4期595-596,601,共3页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50079013)

摘　　要：以成都市府河、南河上所建橡胶坝为例,实地观测其复氧效果,在室内进行了光滑型与加糙型溢流坝的复氧对比试验,发现加糙型溢流坝复氧能力明显优于其光滑型溢流坝.在此基础上,对府河、南河上橡胶坝做适当的人工加糙后,模拟了河流沿程水质变化状况.结果表明:在溢流坝面上设置人工加糙物后,水体紊动加剧,空气被卷吸进入水体形成溶解氧,增加了水体溶解氧.Dissolved oxygen （DO） is an important index of water quality in rivers. According to the field observation of rubber dam in Chengdu rivers and the study of laboratory experiment about reaeration, it is found that the reaeration capability of spillway with artificial roughness will be improved more than that of smooth surface spillway. This theory is achieved and it is found that roughened materials can obviously increase turbulent intense in water body and make much air trapped into water and then increase the content of oxygen in water.

关 键 词：人工加糙 溢流坝 复氧 城市河流 

分 类 号：TV131.2[水利工程—水力学及河流动力学]