retentiebasins

Retentiebasins, also known as detention basins or retention ponds, are engineered structures designed to manage stormwater runoff. They are typically shallow, vegetated depressions constructed in urban and suburban areas. The primary purpose of a retentiebasin is to temporarily store excess rainwater and snowmelt that cannot be immediately absorbed by the ground or conveyed through drainage systems. This temporary storage helps to reduce the peak flow of runoff entering downstream water bodies, such as rivers, lakes, and oceans.

By holding back water, retentiebasins can significantly mitigate the risk of flooding in downstream areas. They also play a crucial role in improving water quality. As stormwater is held in the basin, suspended solids, sediment, and associated pollutants can settle out. Vegetation within and around the basin can further filter pollutants and absorb nutrients. This process helps to reduce the amount of contaminants entering natural waterways, thereby protecting aquatic ecosystems and human health.

Retentiebasins are designed with specific hydraulic characteristics to control the release rate of the stored water. Typically, an outlet structure, often a pipe with a specifically sized orifice or weir, allows water to be released gradually over time. This controlled release prevents sudden surges of water from overwhelming downstream infrastructure. The design and maintenance of retentiebasins are important for their long-term effectiveness in managing stormwater and protecting water resources.