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	SIGMA-COORDINATE NUMERICAL MODEL FOR SIDE-DISCHARGE INTO NATURAL RIVERS
	Liu Zhao-wei ; Chen Yong-can ; Li Ling ; Zheng Jin-yun
	2010-10-12 ; 2010-10-12
关键词	sigma-coordinate three-dimensional model side-discharge natural rivers WATER-QUALITY SYSTEM Mechanics
中文摘要	Due to large topography slopes in natural rivers, pollutant concentration embodies a property of three-dimensional distribution when wastewater is discharged from effluents along the bank. With the sigma coordinate along the vertical dimension fitted to both the moving free surface and the bed topography, a three-dimensional numerical model was developed in the present work to address pollutant transport processes in the above-mentioned cases. To avoid the reduction in accuracy caused by spurious diffusion in the case of steep bottom slopes, a formula for horizontal diffusion in the sigma coordinate system was derived. A case study for the side discharge into a straight open-channel flow shows that numerical results are verified well by experimental data. Furthermore, the present model is also verified by the simulation of discharging wastewater from Fuling Phosphorus Factory effluent into the Three Gorges Reservoir and the agreement between the numerical simulation results and field observation data is satisfactory. The change of the mixing zone scope in the water surface versus the layers along the vertical dimension was also discussed in detail. The study shows that a more realistic calculation for pollutant discharge has been provided by the present model than by the depth-average model which predicts an unrealistically smaller mixing zone.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE INC ; NEW YORK ; 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/82011]
专题	清华大学
推荐引用方式 GB/T 7714	Liu Zhao-wei,Chen Yong-can,Li Ling,et al. SIGMA-COORDINATE NUMERICAL MODEL FOR SIDE-DISCHARGE INTO NATURAL RIVERS[J],2010, 2010.
APA	Liu Zhao-wei,Chen Yong-can,Li Ling,&Zheng Jin-yun.(2010).SIGMA-COORDINATE NUMERICAL MODEL FOR SIDE-DISCHARGE INTO NATURAL RIVERS..
MLA	Liu Zhao-wei,et al."SIGMA-COORDINATE NUMERICAL MODEL FOR SIDE-DISCHARGE INTO NATURAL RIVERS".(2010).

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