A sustainable urban designer plans to install green roofs on 12 buildings. Each roof reduces stormwater runoff by 1,200 liters annually. If runoff was originally 20,000 liters per year across these buildings, what is the total annual runoff after installation?

Sun, 03 May 2026 05:52:24 +0000

A Sustainable Urban Designer’s Green Roof Initiative: Cutting Stormwater Runoff by 6 Million Liters Annually Urban planners and eco-conscious designers are increasingly turning to green roofs as a vital strategy for sustainable stormwater management. A new initiative by a leading sustainable urban designer plans to install green roofs on 12 buildings, significantly reducing stormwater runoff and strengthening urban resilience to flooding. Each building’s green roof is engineered to capture 1,200 liters of stormwater annually—reducing the burden on drainage systems and minimizing polluting runoff. With原先, the total stormwater runoff across these 12 structures was recorded at 20,000 liters per year. By implementing this green infrastructure project, the total annual runoff is expected to drop dramatically. Calculating the Reduction
First, light up the math:
- Removal of 1,200 liters/year per building × 12 buildings = 14,400 liters/year reduction in stormwater runoff.