Pond Boss Forums INTRO Questions & Observations Erosion / run off , 1 ft deep cut

IMO your rocks may help some but the water may just cut the bank and flow along the sides of it. I would slow the water down more and spread the flow out. I had a lot bigger erosion issues than you do. I took a suggestion from Snrub here on the forum to cover the erosion areas with wide bands of rip rap and slow the water down. IMO, in your case, a wide band (maybe 4 to 6 feet) of large rip rap would be great as it will be good habitat for crayfish as well as substrate for periphyton and bacterial colonies once the pond fills. It will also continue providing erosion control to keep that area of the shore from washing out during a big rain event. Here's what I did. The long waterway (I have two of these) in the pic was eroded 2 to 3 feet deep by about 3 feet wide. I have no erosion issues now. You obviously don't need anything this large scale but it will at least give you the idea. (This pic was taken at low pool. When the pond is full, you can't see the rip rap along the shore.)