Add a tool for analysing ponding in a stage storage analysis. This should not just create a one-time table or report, but be a dynamic object in the drawing, similar to a volume surface. In fact, prehaps incorporate it into the tin volume surface object.
An analysis tool within this object should report the area and volume at whatever required interval, and also highlight or colour this area within the drawing. It should be able to produce reports either as dynamic tables, or as external files also (.txt or .xml)
If there are two or more depressions, this tool should give the user that data, and allow them to combine or seperate the volumes in the report.
Credit where credit is due! Give kudos or accept as solution whenever you can.