sadeviemäri

A sadeviemäri, often translated as a storm drain or surface water sewer, is a drainage system designed to collect and transport rainwater and other surface runoff away from streets, parking lots, and other impervious surfaces. These systems are crucial for urban infrastructure, preventing localized flooding and the accumulation of standing water which can damage infrastructure and create hazardous conditions.

The primary function of a sadeviemäri is to channel precipitation that does not infiltrate into the ground into a network of pipes, culverts, and ditches. This collected water is then directed towards natural bodies of water such as rivers, lakes, or the sea, or sometimes to specialized treatment facilities. The design and capacity of a sadeviemäri system are critical, needing to account for the volume of rainfall expected in a given area, as well as the rate at which water flows.

Unlike sanitary sewers, which carry wastewater from homes and businesses, sadeviemäri systems typically handle untreated stormwater. This means that pollutants washed off surfaces, such as oil, grease, litter, and sediment, are often directly discharged into receiving waters. Consequently, the environmental impact of sadeviemäri systems is a significant concern, leading to efforts in urban planning and water management to incorporate green infrastructure solutions like permeable pavements, rain gardens, and bioswales to mitigate pollution and reduce runoff volume. Regular maintenance, including cleaning out debris and sediment, is essential to ensure the effective operation of sadeviemäri systems and prevent blockages.