Lake Põrmujärv in Navi village, Võrumaa, is in poor condition. Every year, blue-green algae grow there and the water smells. Local people are not happy about this. Scientists have now placed an artificial island in the lake. They hope it will help make the lake healthier. Additionally, biodiversity in the lake should be restored.
Scientists from the Estonian University of Life Sciences are working together with researchers from Sweden and Latvia. They are trying to find solutions to improve the poor condition of the lake. They have placed floating islands in Lake Põrmujärv and two Latvian lakes. The islands have carefully selected aquatic vegetation.
The lake has a lot of blue-green algae. These are also dangerous because they produce toxins. Emeritus Professor Ingmar Ott said that the artificial island could grow species that thrive quickly in the local environment. He named three plants: water soldier, common reed, and water mint. These plants should absorb nutrients and create a living environment in the lake.
Previously, attempts were made to improve the condition of Lake Põrmujärv. Lake sediment was removed, and the water surface was expanded. However, the situation worsened. Now, scientists hope that the new method will help purify the lake water. Placing the artificial island is the first attempt.
Local resident Alar Meltsov said that studies showed the lake water is dangerous. He said: "Do not water tomatoes, cucumbers, or salads with this water. Microcystins in the water remain in the plants and are dangerous." He also said: "Hope dies last. We hope our beautiful lake will return. We want to swim, fish, and enjoy the lakeshore."