Yläalue
Yläalue is a term used in Finnish geography and planning to refer to the upper or higher-level region of a catchment area. This concept is commonly applied in the context of hydrology and water management, particularly in Finland's karstic terrain where surface water often drains into underground aquifers and eventually joins rivers and lakes at lower elevations.
In a yläalue, the terrain is typically characterized by hills, valleys, and ridges, often with sparse vegetation
The concept of yläalue is significant in Finnish water policy and management, as it affects local water
Studies and research have shown that the yläalue areas are sensitive to changes in land use, such