BDAs and PALS
Beaver dam analogs (BDAs) and post-assisted log structures (PALS) act as “speed bumps” for water in eroded and straightened channels. This slowdown of the water gives pollution more time to break down and allows for planting of aquatic vegetation which has a further positive effect on water quality.
Other expected outcomes of this approach are:
- Reversal of stream bank erosion
- Trapping of sediment
- Improved wildlife habitat