Methods to Reduce Urban Runoff Practice Test

A city plans to redevelop a downtown block currently covered by asphalt parking lots and sidewalks. During storms, water rapidly flows into storm drains and causes combined sewer overflows. Which redesign most directly reduces surface runoff volume by allowing rainwater to infiltrate where it falls?

A downtown retrofit includes bioswales along roads, permeable sidewalks, and a small retention pond in a public plaza. Which outcome is most likely during a moderate storm compared with the pre-retrofit condition?