Which feature reduces sediment delivery by intercepting sediment, nutrients, and pesticides before they reach water bodies?

Which feature reduces sediment delivery by intercepting sediment, nutrients, and pesticides before they reach water bodies?

• A. Wetland
• B. Levee
• C. Channel
• D. Buffer Strip

Answer: (D)

Buffer strips, or riparian buffers, are vegetated strips placed between fields and water bodies. They slow down runoff and allow sediment to settle out, while the vegetation and soils take up nutrients and degrade or immobilize pesticides. This filtering action reduces the amount of sediment, nutrients, and pesticides that reach streams or rivers. Wetlands can also trap pollutants, but buffer strips are specifically designed along field margins to intercept pollutants before they enter water bodies. Levees and channels primarily control water flow and flood risk, not pollutant interception.

Buffer strips, or riparian buffers, are vegetated strips placed between fields and water bodies. They slow down runoff and allow sediment to settle out, while the vegetation and soils take up nutrients and degrade or immobilize pesticides. This filtering action reduces the amount of sediment, nutrients, and pesticides that reach streams or rivers. Wetlands can also trap pollutants, but buffer strips are specifically designed along field margins to intercept pollutants before they enter water bodies. Levees and channels primarily control water flow and flood risk, not pollutant interception.