A public car park for cars and coaches has been redeveloped at the Silesian Botanic Garden. This is no ordinary car park, as not only utility or aesthetic qualities were taken into account in its design, but also rainwater retention. The surface of the car park is made of paving blocks (laid with spacers to allow water to run off) and openwork panels between which grass will be sown. Bioretention system elements such as:

Infiltration (absorption) trenches – sunken retention areas designed to retain water and slow down runoff, allowing rainwater to infiltrate;

Absorption basins – vegetated areas of lowered ground where water is temporarily collected, treated and then infiltrated into the ground;

Absorption troughs – linear, wide and shallow open channels vegetated with low vegetation that intercept and transport rainwater;

Local depressions – with drainage applied and vegetated to withstand constant or frequent flooding with water;

Vegetated lanes – areas densely planted with water-loving vegetation with a shaped bottom;

Root boxes – protecting the car park area with tree planting.