Which is a common example of a Structural BMP?

Which is a common example of a Structural BMP?

• A. Detention basin
• B. Rain garden
• C. Cover crop
• D. Riparian buffer

Answer: (A)

Structural BMPs are engineered features built into the landscape to physically manage stormwater—storing, delaying, or treating runoff before it leaves a site. A detention basin is a quintessential example because it is a man-made storage area that captures runoff during a storm and gradually releases it, which lowers the peak flow downstream and gives sediments and some pollutants time to settle out. This built-in storage and treatment function is what defines a structural BMP and makes a detention basin a textbook illustration. Rain gardens are also engineered and filter runoff through soil and vegetation, but they’re typically described as bioretention or treatment features rather than a storage-type structure. Cover crops and riparian buffers rely on vegetation and land-management practices to reduce erosion and filter pollutants, without a dedicated engineered structure to hold and release water.

Structural BMPs are engineered features built into the landscape to physically manage stormwater—storing, delaying, or treating runoff before it leaves a site. A detention basin is a quintessential example because it is a man-made storage area that captures runoff during a storm and gradually releases it, which lowers the peak flow downstream and gives sediments and some pollutants time to settle out. This built-in storage and treatment function is what defines a structural BMP and makes a detention basin a textbook illustration.

Rain gardens are also engineered and filter runoff through soil and vegetation, but they’re typically described as bioretention or treatment features rather than a storage-type structure. Cover crops and riparian buffers rely on vegetation and land-management practices to reduce erosion and filter pollutants, without a dedicated engineered structure to hold and release water.