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Volume 6 Issue 4
Dec.  2018
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ZHU Heng-hua, JIA Chao, XU Yu-liang, et al. 2018: Study on numerical simulation of organic pollutant transport in groundwater northwest of Laixi. Journal of Groundwater Science and Engineering, 6(4): 293-305. doi: 10.19637/j.cnki.2305-7068.2018.04.005
Citation: ZHU Heng-hua, JIA Chao, XU Yu-liang, et al. 2018: Study on numerical simulation of organic pollutant transport in groundwater northwest of Laixi. Journal of Groundwater Science and Engineering, 6(4): 293-305. doi: 10.19637/j.cnki.2305-7068.2018.04.005

Study on numerical simulation of organic pollutant transport in groundwater northwest of Laixi

doi: 10.19637/j.cnki.2305-7068.2018.04.005
  • Publish Date: 2018-12-28
  • The construction and hydrogeological area in the low hill, which is northwest of Laixi City and in the east of Shandong Province more precisely, is one of Dagu River’s groundwater source. Regarding COD as the typical pollutant according to general situation of groundwater pollution in aforementioned area, a three-dimensional advection-dispersion model was established to simulate the transport of organic pollutants under two accident conditions. In addition, the effect of corresponding dispersity was analyzed. The results show that COD transport is mainly in accordance with the direction of groundwater flow, pollutant concentration and its gradient as well as the rule of narrower pollution range in deeper stratum. Moreover, COD is mainly transported and diffused in groundwater of sandy soil in the first and second layers. However, under accident condition II, the pollutant concentration begins to decay gradually after its transport and diffusion tends to be stable. Besides, in terms of dominance, dispersion is to transverse transport of pollutants what advection is to longitudinal transport. If considering random dispersion, the final results see higher peak concentration of COD and longer transverse distance from pollution center compared to transport route. What’s more, the pollution plume changes and concentration isocline becomes slightly irregular.
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