CSLB C-27 Landscaping ContractorPlanting and LandscapingMedium
A landscape contractor is planning to install a permeable paving system in a parking area to manage stormwater runoff. Which of the following is the primary benefit of using a permeable paving system compared to traditional impervious paving?
- AElimination of all maintenance requirements.
- BReduced stormwater runoff volume and improved water quality through filtration.
- CLower initial installation costs due to simpler material requirements.
- DIncreased structural strength for heavy vehicle traffic.
Show answer & explanationAnswer & explanation
Correct answer: B. Reduced stormwater runoff volume and improved water quality through filtration.
The primary benefit of permeable paving systems is their ability to allow stormwater to infiltrate through the surface into the underlying soil or aggregate base. This significantly reduces runoff volume, recharges groundwater, and filters pollutants, thereby improving overall water quality.
Why the other options are wrong
- A. Permeable paving systems require specific maintenance, such as regular vacuuming or sweeping to prevent clogging of pores, so they do not eliminate all maintenance.
- C. Permeable paving systems often have higher initial installation costs due to specialized materials (permeable pavers, specific aggregate layers) and installation techniques.
- D. While some permeable systems can support heavy loads, their primary benefit is not superior structural strength compared to well-engineered traditional paving, which can be designed for very heavy traffic.
Permeable Paving Benefits
Advantages of using permeable surfaces in landscaping, primarily focused on sustainable stormwater management and environmental benefits.
- Reduces stormwater runoff.
- Filters pollutants.
- Recharges groundwater.
Memory trick: Permeable 'Paves' the way for 'cleaner' water and 'less' runoff.