Abstract
The purpose of this paper is to find the variation of pollutant concentration field and its impact on water intake of the Fen River entrance into Yellow River. A 2-D water hydrodynamic and quality model was used to simulate flow and variation of the pollutant concentration field. There will be a backwater in tributaries when the water in Yellow River flow into Fen River. The COD concentration decreased significantly at the mouth of the Fen River into the Yellow River. The water quality fit class III and ⅴat North Zhao water intake in normal year(P=50%) and dry year(P=75%). The pollution area of lower reach is long and narrow in these years because the obstruction of central shoal. The flow path should be approximately 2.3km,2.9km in normal year(P=50%) and dry year(P=75%) to keep COD concentration in class III.
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