Which of the following best describes micro-bioretention or raingardens?

Micro-bioretention systems, often referred to as rain gardens, are specifically designed to manage and treat stormwater runoff from small areas, such as residential lots, sidewalks, and smaller commercial sites. The primary function of these systems is to absorb, slow down, and filter the stormwater through various soil and plant media, effectively removing pollutants and enhancing water quality before it enters the drainage system or nearby bodies of water.

By focusing on small areas, micro-bioretention systems can efficiently handle the volume and rate of runoff typically generated by these locales, allowing for natural processes such as infiltration and evapotranspiration to take place. This facilitates energy dissipation and reduces the risk of erosion or overwhelming drainage systems.

Other options presented do not accurately reflect the characteristics of micro-bioretention systems. For instance, they do not treat runoff from large industrial areas, which require more extensive and robust systems due to higher pollutant loads. Additionally, while they can handle inflow from a variety of sources, they are not primarily focused on concentrated inflow; instead, they are adept at managing the more dispersed runoff typical of small impervious areas. Lastly, the filtration methods employed in rain gardens are not overly complex; they rely on the natural filtration capacity of soil and