Simulation on water flow characteristic and pollutant diffusion at the Fen River entrance into Yellow River

• 1、State Key Laboratory of Eco-Hydraulic Engineering in Shaanxi , Xi’an University of Technology, Xi’an 710048
• 2、State Key Laboratory of Eco-Hydraulic Engineering in Shaanxi , Xi’an University of Technology, Xi’an Shaanxi 710048
• 3、 ShanXi Conservancy Technical College, Department of Water Conservancy Engineering, Yun Cheng Shanxi 044004

Abstract：[Purpose] Flow characteristic and distribution of pollution belt at entrance at Fenhe River outfall is simulated in order that contaminant migration and transformation law in the river is comprehended preferably. [Method]According to the measured elevation values of section 59-60, interpolation method is used to supplement the bathymetry. Then bathymetry is triangulated by unstructured grid. A 2-D hydrodynamic and water quality model is established. Alternative direction implicit iteration (ADI) applied to integral the continuity and momentum conservation equation.[Result] Model validation results are in good agreement with the measured data, and the result of velocity distribution and contaminant concentration distribution are given by simulation of COD in 50%, 75%, 90% hydrologic year types in the Fen River into the Yellow River estuary.[Conclusion] The consequences are acquired that as the increase of hydrologic frequency years,area of river mouth beach formed is reduced and the COD value is up to the standard after 2.35 km, 3 km, 4.2 km distance.

Keywords： environmental engineering the Fen River into the Yellow River unstructured grid hydrodynamic model for water quality the spread of contamination with distribution