Pond Boss Forums INTRO New Forum Member Introduction Newbie retired colonel needs your help

Colonel Bob, welcome to the forum and thank you for your service.

To mitigate the erosion, there are two things to do.

1) Once the seed is down, spread out erosion mats and stake them in place. Those are the stray mats that you might see on some roadside construction jobs. They slow down the water velocity as it goes downhill, and also holds moisture to improve germination of the seed.

2) Reduce the slope of the ground to reduce the water velocity. That is a 2 edged sword with a groundwater pond as going from full pool to "normal" pool you will have a lot of area that might need re-seeding unless it is covered in plants that can take varying water levels.

Sand won't typically stay in place on slopes steeper than 3:1, and even at that, there's a pucker factor when using a riding mower on that slope. 4:1 or greater (less?) is much easier to walk on, and has less erosion, but even a 6:1 should have erosion mats on it to get the seed started without having to fill in and re-seed gully's that were washed into the ground.