Which of the following is NOT a strategy for managing stormwater runoff?

Using traditional asphalt surfaces is indeed not a strategy for managing stormwater runoff effectively. Traditional asphalt is impermeable, meaning it does not allow water to percolate through it. As a result, rainwater runoff is significantly increased, leading to higher volumes of water entering drainage systems quickly, which can contribute to flooding and erosion. This surface can also carry pollutants directly into waterways without any filtration or natural management, worsening water quality.

In contrast, implementing green roofs, utilizing permeable surfaces, and building retention ponds are all recognized methods for managing stormwater. Green roofs absorb rainwater, reduce runoff, and promote evaporation. Permeable surfaces allow water to flow through them and into the ground, which helps recharge groundwater levels and reduces the volume of runoff. Retention ponds are designed to collect and store stormwater, allowing it to be released slowly and effectively mitigating flooding impacts. Thus, the option of using traditional asphalt surfaces does not align with effective stormwater management practices.