A rock weir is a reasonable approach to stabilizing a small to medium sized overfall. Correctly placed rock can provide long-term erosion control
Pond fencing helps reduce erosion and improve water quality where livestock create bare banks and trails along a pond. A pond fence should protect all of a dam, the initial portion of a spillway, a portion of the incoming waterway(s), and most if not all of the shoreline.
Diagram of a pond fence with a livestock water access point. View Publication