It looks like you have an area(in the center of the picture) that is barren and the runoff heads towards the pond. If this is this case, you might consider diggining a trench that redirects thats water so it doesn't carry all the silt into the pond.
FnC, that's exactly where I was going. Ground cover may be difficult, so diversion terraces may also be a solution. My experience with water flow leads me to believe that water speed is a bigger issue than water volume. 100 gallons of water flowing at 50 GPM should cause more damage than 100 gallons flowing at 5 GPM.
