Dagvattenavrinning

Dagvattenavrinning refers to the flow of rainwater and melted snow over the Earth's surface. This water originates from precipitation and then collects in streams, rivers, lakes, and oceans. The process is influenced by several factors including topography, soil type, vegetation cover, and the presence of impervious surfaces like roads and buildings.

In urban areas, dagvattenavrinning is a significant concern. When rain falls on paved surfaces, it cannot infiltrate the ground and instead flows into storm drains. This runoff can pick up pollutants such as oil, grease, heavy metals, fertilizers, and pesticides from streets and other urban environments. These pollutants are then transported directly into local waterways, potentially causing environmental damage and impacting water quality.

Managing dagvattenavrinning is crucial for both environmental protection and urban planning. Strategies include the use of green infrastructure like rain gardens, permeable pavements, and green roofs, which help to absorb and filter rainwater, reducing the volume and pollutant load of runoff. Traditional methods involve engineered systems like storm sewers and detention ponds. Effective management aims to minimize flooding, improve water quality, and recharge groundwater. The goal is to mimic natural hydrological processes as much as possible within developed landscapes.