On Tuesday May 14th, Lahti is holding an event called Water management innovations from City of Lahti at the Helsinki EU Office to promote the city's wide-ranging water body expertise. The city also has a booth focusing on water protection solutions at the EU Green Week conference from May 15th to 17th. Lahti's strength in the Green Capital competition is providing other cities with environmental solutions that can be adjusted to various conditions.
The environmental research in the Lahti region began with the protection of Lake Vesijärvi
The restoration of Vesijärvi began with the opening of the Kariniemi wastewater treatment plant in 1976. This biomanipulation project attracted international interest and ran from 1987 to 1994. The second phase of the restoration began with cooperation with Lahti's neighbouring municipalities and the University of Helsinki in the 2000s. The Lake Vesijärvi Foundation was founded in 2007 to protect the water bodies in Lake Vesijärvi and the Lahti region.
The research on Lake Vesijärvi created the basis for the diverse environmental research conducted by the University of Helsinki's Department of Environmental Sciences in the region. Nowadays, the Lake Vesijärvi programme's direct funding of EUR 250,000 annually comes mainly from the Lahti Group. In addition, the city funds the programme with a nearly equal amount through its environmental services. Other municipalities, companies and individuals contribute in the funding as well.
Innovative stormwater solutions and watercourse restoration measures
New natural solutions are being developed in Lahti to purify stormwater. Discharges such as heavy metals, nutrients and microplastics are carried in stormwater to bodies of water. The discharge load in Lake Vesijärvi is reduced by conducting the stormwater from the city centre area to large biofiltration ponds for processing.
In the watercourse renovations, creek beds have been restored by adding rocks and gravel to cleared rapids and by removing man-made barriers for the passage of fish. Vanished trout populations have been restored by planting egg boxes.
Environmental Director Saara Vauramo, tel. +358 (0)44 716 1585
Water Protection Manager Ismo Malin, tel. +358 (0)50 525 9579