摘要
通过实验室水槽实验,研究了感潮河段疏浚时机械作用对污染底泥释放污染物的影响,并与底泥污染物静态释放过程进行了对比分析。研究结果表明,底泥表面被破坏并产生再悬浮时,底泥中的耗氧性污染物释放到水体中,产生的化学需氧量比静态扩散时大得多。根据实验结果,分别针对静态水流和动态水流条件,利用菲克第一定律和第二定律,推导了反映底泥污染物释放的公式。
The influence of dredging - caused bottom mud disturbance on the process of pollutants release was studied and compared with the static pollutants release process through laboratory flume experiments. The study results showed that when sed- iment surface was damaged and re - suspension occurred, oxygen - demanded contaminants were released into the water, the chemical oxygen demand was much greater than that in static release process. Based on experiment results, the contaminant re- lease formulas for static and dynamic water flow conditions are derived respectively by Fick＇s first law and second law respectively.
出处
《人民长江》
北大核心
2013年第21期108-111,116,共5页
Yangtze River
基金
上海市科技攻关项目(11231200300)
关键词
感潮河流
底泥污染物
静态释放
再悬浮
化学需氧量
苏州河
上海市
tidal reach
sediment pollutants
static release
re - suspension
chemical oxygen demand （COD）
Suzhou River
Shanghai
