Berms are the talk of the town, these days. Let’s pull out the rumour stick and find out what actually goes into the process of berm design.
Designing berms for flood mitigation is a complex, staged process which starts with the location of the berms based on provincial flood maps, and an evaluation of height and width based on flow rates. The berms must be adaptable so they can be built higher if necessary, and wide enough to allow for emergency vehicle access. Next, to ensure the stability of the berms, the soil and vegetation are investigated along with existing utilities and proximity to homes. Finally, the design must be approved by a number of regulatory bodies before the technical team can move to detailed design and construction. It’s no surprise this is the talk of the town as there is a lot involved in the process. Make sure to visit https://floodreadiness.drumheller.ca/ to make sure you’re up to date.
Are trees a help or a hindrance when it comes to flood mitigation?
While trees, brush and vegetation can, and will, be used as nature-based solutions for flood mitigation — large trees on top of berms are absolutely a hindrance. When the tree dies, or falls over, it will compromise the integrity of the berm. A number of trees are being removed now so engineers can review slope stability and make sure new and enhanced berms don’t contain stumps or root balls. Each tree that is removed will be replaced by a 5:1 ratio with trees and shrubs in the community.