In this class, we’ve learned about the importance of green infrastructure, and we’ve taken a look at different types of green infrastructure, in particular bioswales. However, one other type of green infrastructure that I want to take a look at is permeable pavement. Although we have seen it in class as well, we didn’t really take a close look at how it works, as well as different types.

In general, permeable pavement works by allowing water through the pavement, which allows it to be collected underneath. Additionally, the gravel/stones of the pavement act as a natural filter, cleansing the water of pollutants. The purpose of permeable pavement is to avoid stormwater buildup above-ground. It allows stormwater and excess rainwater to be collected underground.

When it comes to permeable pavement, there are three types:

1. Traditional asphalt/concrete – The regular mix of asphalt/concrete is used, except that some particles are left out to make the pavement more porous
2. Plastic pavers – Plastic grids that have a honeycomb shape, and allow grass and vegetation to grow in between the holes
3. Concrete pavers – Concrete blocks with spaces in between them, where water can be drained effectively

Depending on where you are building, different types of permeable pavement may be more suitable to your needs. Overall though, any of these does a great job at filtering and storing excess stormwater.