马踏湖水流水质数学模型及其应用研究

马踏湖是山东省“两湖一河”碧水行动的重要治理对象.根据地理信息系统对马踏湖进行了边界条件的简化处理以及网格划分,并基于SMS（Surface Water Modeling System）软件,建立了马踏湖二维水流水质模型,选取确定了模型中的参数和数值,模拟了不同工况条件下流场和CODCr浓度场.结果表明,6种工况中,工况3和工况6湖区达标面积最大,但其停留时间短,不利于污染物扩散,导致出口浓度不达标；其他工况条件下,出口浓度较小,但是湖区CODCr浓度达标面积比例较低,超过地表水环境质量Ⅲ类标准.在此情形下提出建立人工湿地对策以满足马踏湖的蓄水条件.

Water flow and water quality mathematical model of Mata Lake and its application research

The Mata Lake is an important management object of ＂Two Lakes and One river＂ Clean- ing Water Action. With the help of SMS （Surface Water Modeling System） software, two-dimen- sional hydrodynamic model and two-dimensional water transport and diffusion model of the Mata Lake are established; based on the Geographic Information System, simplification of the Mata Lake1 s boundary and meshing of lake districts have been done l some related parameters have been select- ed and set. Moreover, flow field and CODcr concentration field under all kinds of conditions are presented; feasibility and advantages of artificial wetland are demonstrated. By comparing the six different working conditions, the area up to standards of working condition three and six is relative- ly large, but, due to the unpleasant effect of the flow field, the outlet concentration of them is still not up to standards; export concentration of other working conditions is relatively low, but the area up to standards is still small, they cannot meet the surface water environment quality class III standards. In this case, the method of establishing artificial wetlands to meet Mata Lake＇s water storage conditions is suggested in the paper.