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MT3DMS constant contaminant cells


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I need a help. I have set up a MODFLOW model (attached). The simulation gives correct head change condition. Now I am trying to set up an MT3DMS model. I am providing a constant concentration of 3 mg/l in the specified head cell. I have a well in the package. However, it is not acting as source/sink. I am trying to set an areal source-sink and giving a low areal recharge as not more contaminant add by recharge. However, the contaminant is not moving and its giving 0 concentration overall. Can you please tell me what I am doing wrong? Do I need to provide recharge as the same as constant concentration? Thank you


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