Ympäristövirtojen

Ympäristövirtojen (environmental flows) refer to the flow of water or other natural resources that are needed to maintain the health of ecosystems and the environment. These flows are essential for the survival and well-being of aquatic life and the ecosystem as a whole.

In the context of water management, environmental flows are typically determined by assessing the minimum flow requirements of rivers, streams, and wetlands to maintain ecological integrity. This includes considerations such as water quality, sediment transport, and habitat maintenance for fish and other aquatic species. Environmental flows may need to be supplemented by artificial water releases to ensure that the required levels are met, particularly during periods of drought or water scarcity.

The importance of environmental flows was recognized at the 1992 Dublin Statement on Water and Sustainable Development, which emphasized the need to ensure that water is used efficiently and sustainably, and that environmental and social needs are balanced with economic development.

In practice, environmental flows are often managed through the creation of water storage and release systems, such as dams and weirs, which allow for the regulation of water levels and flows. Monitoring and maintenance of these systems is crucial to ensure that they meet the required environmental flows and do not harm the ecosystems downstream.

Effective management of ympäristövirtojen is essential for maintaining healthy and productive ecosystems, which in turn support a range of vital ecosystem services, including water purification, carbon sequestration, and biodiversity conservation.