What role do filter strips serve in stormwater management?

Filter strips play a crucial role in stormwater management by treating sheet flow from adjacent impervious surfaces. These vegetated areas are strategically designed to intercept and filter stormwater runoff before it reaches water bodies or drainage systems. The vegetation helps to slow down the flow of water, allowing sediment and pollutants to settle out, which enhances the water quality by removing contaminants such as nutrients, oils, and heavy metals.

In addition to improving water quality, filter strips can also contribute to groundwater recharge by allowing some water to infiltrate through the soil. The presence of vegetation can also help to stabilize the soil and reduce erosion, further minimizing the negative impacts of stormwater runoff.

The other choices do not align with the primary function of filter strips. They are designed to effectively manage and treat runoff, not to increase flow velocity, decrease vegetation growth, or maximize sediment discharge. Instead, they work to mitigate the adverse effects of impervious surfaces on the hydrologic cycle and overall ecosystem health.