What is a structural BMP and provide two examples?

What is a structural BMP and provide two examples?

• A. A temporary device used during construction.
• B. A permanent physical component that treats or conveys stormwater.
• C. A vegetation cover only.
• D. A reporting form.

Answer: (B)

A structural BMP is a permanent physical component that treats or conveys stormwater. It’s a fixed feature of the drainage system, designed to remove pollutants or control how runoff is released. For example, a detention basin holds stormwater temporarily so sediments can settle and pollutants are reduced before the water leaves the site, which also helps lessen peak flow. Another example is an oil–water separator, installed in areas like parking lots to remove hydrocarbons from runoff before the water is discharged or infiltrated. These structures remain in place and actively manage water, unlike temporary devices or vegetation-only measures.

A structural BMP is a permanent physical component that treats or conveys stormwater. It’s a fixed feature of the drainage system, designed to remove pollutants or control how runoff is released. For example, a detention basin holds stormwater temporarily so sediments can settle and pollutants are reduced before the water leaves the site, which also helps lessen peak flow. Another example is an oil–water separator, installed in areas like parking lots to remove hydrocarbons from runoff before the water is discharged or infiltrated. These structures remain in place and actively manage water, unlike temporary devices or vegetation-only measures.