| 潘 俊,高维春,田海龙,臧海洋.潜流式人工湿地的数值模拟与参数率定[J].水利学报,2010,41(11): |
| 潜流式人工湿地的数值模拟与参数率定 |
| Numerical simulation and parameter calibration for subsurface flow wetland |
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| DOI： |
| 中文关键词: 潜流式人工湿地 数值模拟 敏感度分析 参数率定 |
| 英文关键词: subsurface flow wetland numerical simulation sensitivity analysis parameter calibration |
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| 中文摘要: |
| 以沈阳辉山明渠河口潜流式人工湿地为例，利用数值模拟预测了该湿地的运行效果。采用多孔介质水流与溶质运移耦合模型，通过对湿地模型的概化与处理，利用FEFLOW软件针对潜流基质层的水流和溶质扩散进行数值模拟，通过敏感度分析确定基质层的孔隙度、渗透系数、弥散系数和吸附降解系数为影响污水处理效果的敏感参数，并通过参数率定对所建立的湿地模型进行了模拟预测，结果证明所构建的湿地模型的预测值与观测值拟合程度较好。可为潜流式人工湿地设计中运行效果预测及参数设定提供一种新的有效方法。 |
| 英文摘要: |
| The effectiveness of the operation for a subsurface flow wetland and the method of parameter cali?
bration in numerical simulation and prediction are investigated. The coupling model for flow and solute trans?port in porous medium is established and the software FEFLOW is utilized to simulate the flow and solute diffusion in matrix layer of subsurface flow wetland based on the conceptualization and processing of the model. The sensitivity analysis shows that porosity，hydraulic conductivity，dispersive and first-order-decay rate are the sensitive parameters affecting the treatment effect. In the meantime，the calibrated parameters are utilized in simulation and prediction of the wetland model. The results predicted by the model are in good agreement with observation data. |
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