Hi,
For a steady flow/transient transport modeling, the contaminat source is a pond with very concentrated contaminant. If water is pumped out from wells surrounding the pond, the pond could be dry. How to represent the pond in the model? I tried using 1st BC, but it looks like it is not a good choice. When I use large pumping rate, there are always contaminant entering the subsurface. I appreciate any input for this.
Zheng
