How do I represent wide streams, lakes or wetlands with line-sinks?
This may depend on where the surface water feature occurs. In the near-field line-sinks should be placed along the perimeter of the surface water feature, whether a lake or a stream. In the farfield streams and small lakes or wetlands may be represented with line-sinks at their centers, while larger lakes and wetlands may still require a few line-sinks around their perimeter. The idea for the near-field lakes or wetlands is that groundwater will enter the lake (wetland) near its boundary, thus that is where the line-sinks should be. In the event that the lake, wetland or stream bottom offers resistance to groundwater inflow or outflow, line-sinks with resistance should be used. As a rule of thumb, the line-sink width should be set to the square root out of the product of the aquifer transmissivity and the bottom resistance. In case this width is more than the stream width, the line-sink may be placed at the center of the stream and be given the actual stream width.
