摘要
文章考虑水质迁移过程及水体自净作用,构建了基于三维水动力模型的河道水质数值模拟模型,运用无结构贴体网格划分技术建立了河道的计算网格模型,实现了对BOD5、NH3-N以及TP浓度扩散过程的模拟,分析了水质指标的迁移规律。结果表明:河道水质自上游向下游逐渐变差,该河道的污染源主要来自其他河道的输入性污染,下游河道水质劣于《地表水环境质量标准:GB3838-2002》Ⅴ类水标准。
Considering the water quality migration process and water self-purification,a numerical simulation model of river water quality based on three-dimensional hydrodynamic theory was constructed.The partitioning technology of the unstructured body-fitted grid was applied to the numerical model to establish the computational grid model of the river.The simulation of BOD5,NH3-N and TP diffusion process were accomplished,and the migration rule of water quality index was analyzed.The results show that the water quality of the river gradually deteriorated from upstream to downstream and the imported pollution from other rivers was the main pollution sources and the water quality of the downstream river was over Class V of Surface Water Environmental Quality Standard.
作者
周正印
杨楠
ZHOU Zhengyin;YANG Nan(Tianjin Municipal Engineering Design&Research Institute,Tianjin 300392,China)
出处
《环境保护科学》
CAS
2019年第6期108-113,共6页
Environmental Protection Science
关键词
河道
黑臭水体
三维
水质模拟
弯道环流
Black-Odor River
Water Quality
Three-Dimensional Model
Circulation Flow
