Rain gain vs Dran stain
Many people would consider urban flooding of low-lying sheets and underpasses to be a direct result of extreme weather. While that may be true in certain cases, there could also be another important factor at play. When cities and suburbs expand, more and more land becomes paved. In these areas a sewer system is installed to handle rainwater. The addition of these systems (with limited earth, streams and ponds surrounding them as an alternate for run-off) could easily overwhelm the original infrastructure the system connects into, if that infrastructure is not designed to handle the acres and acres of extra run-off.
how to help reduce the overflow
Avoid adding to municipal drains during overload periods by disconnecting downspouts from house drains that are connected to public sewers, and redirecting them towards a rain barrel or uncovered ground such as a lawn, garden or other open area.
- Consider flagstone, brick or gravel on patios, pathways and driveways, instead of concrete or asphalt.
- When landscaping, be sure to leave lots of “breathable” earth, and encourage natural drainage to a runoff area, such as a pond, basin or creek bed.
- Add trees or other vegetation where practical and beneficial, to help hold soil and absorb moisture.
- Consult with your civic works department for specific advice if you are concerned about management of excess runoff in certain areas.