Dagvattenflöden

Dagvattenflöden refers to the flow of stormwater, which is water that enters a drainage system after precipitation such as rain or snowmelt. This water can originate from various surfaces including rooftops, roads, paved areas, and natural landscapes. When precipitation falls on impermeable surfaces, it cannot infiltrate the ground and instead flows over the surface, accumulating and eventually entering storm drains.

The management of dagvattenflöden is a critical aspect of urban planning and environmental engineering. Uncontrolled stormwater runoff can lead to several problems. It can cause erosion and flooding, damaging infrastructure and properties. Furthermore, stormwater often picks up pollutants like oil, grease, sediment, heavy metals, and fertilizers as it travels across urban surfaces. These pollutants are then carried into rivers, lakes, and coastal waters, degrading water quality and harming aquatic ecosystems.

Effective dagvattenflöden management strategies aim to control the quantity and improve the quality of stormwater runoff. These strategies include both traditional grey infrastructure, such as pipes and detention basins, and increasingly, green infrastructure solutions. Green infrastructure encompasses techniques like permeable pavements, rain gardens, green roofs, and bioswales, which mimic natural hydrological processes to slow down, filter, and infiltrate stormwater closer to its source. The goal is to reduce the volume of water entering conventional drainage systems and to remove pollutants before they reach natural water bodies.