Regional water situation

Kanta-Häme, Pirkanmaa and Pori region 14.7.

In the Kokemäenjoki river basin, the flow rate of Loimijoki river is slightly higher than the summer average since the heavy rainfall at the beginning of July, and in the main stem of Kokemäenjoki river, the flow rate is close to the average levels of the season. No significant changes are forecast for the next few days.

The water levels of large regulated lakes in the Kokemäenjoki river basin are mainly close to the average seasonal levels. The water levels of natural lakes, on the other hand, have remained significantly lower than usual in the summer, as a result of the low amount of snow in the winter and the early spring that was low in precipitation. The water levels of lakes are still, in places, close to the lowest seasonal levels in their measurement history. For example, the water level of Lake Tarjanne is currently close to the lowest water level in early July in its observation history that began in 1865. In Valkeakoski, restrictions on flow regulation were introduced at the end of March, to prevent excessive decline of the water level of Lake Mallasvesi. Despite this, the water levels of Lakes Mallasvesi and Längelmävesi are currently approximately 20 cm below the seasonal average.

In the Karvianjoki river basin, the water levels of lakes and rivers are at average levels or slightly higher than average, and will remain declining in the next few days.