downcut new river course if mouth is surrounded by land (in case there’s more than one cell) and stop run if steepest descent routine goes back to a cell that’s already part of the course
downcut new river course if mouth is surrounded by land (in case
there’s more than one cell) and stop run if steepest descent routine
goes back to a cell that’s already part of the course

katmratliff/avulsion-bmi,mcflugen/avulsion-bmi