Tuloma River
From Wikipedia, the free encyclopedia
| Tuloma | |
|---|---|
| Finnish: Tuulomajoki | |
| Region | Murmansk Oblast, Russia |
| Length | 64 km (40 mi) |
| Watershed | 21,500 km² (8,301 mi²) |
| Discharge | Kola Bay |
| - average | 255 m³/s (9,005 ft³/s) |
| Source | Nota River |
| - location | Saariselkä, Lapplands län, Finland |
| Mouth | |
| - location | Kola Bay, Murmansk Oblast, Russia |
| Major tributaries | |
| - left | Lotta |
| - right | Pecha, Ulita |
The Tuloma River (Russian: Тулома, Finnish: Tuulomajoki) is a river in Murmansk Oblast in Russia. With a drainage basin of 21.500 km2 and an average discharge at 255 m3/s, the Tuloma is one of the biggest rivers in northern Fennoscandia.
The river has its sources in the Saariselkä mountains in the eastern parts of Lapplands län in Finland. The Tuloma River itself is formed by the confluence of the Lotta and Nota rivers at Lake Notozero, and its outflow is in the Kola Bay, 10 km south of Murmansk in the Kola Peninsula in Russia.
[edit] Hydro Power development
There are two hydroelectric power stations on the Tuloma. The Lower Tuloma was finished in 1938, and is located at the town of Murmashi, close to the rivers outflow into the Kola Bay. The dam raised the river 19 meters, and the resulting reservoir was 60 km long.
The second and largest power plant, the Upper Tuloma, was built in the 1960's at Verkhnetulomskiy, 60 km further upriver. A 62 meter high dam was constructed below the outflow from Lake Notozero, forming a large reservoir 120 km long and up to 20 km wide.
| Hydroelectric Plant | Year built | Head | Capacity | Avg. annual production |
|---|---|---|---|---|
| Lower Tuloma | 1934-38 | 19 m | 56MW | 250 GWh |
| Upper Tuloma | 1961-66 | 62 m | 268 MW | 800 GWh |
[edit] Fishing
The Tuloma used to be a great salmon river, on a par with the famous Tana River in Norway in productivity, with annual catches in excess of 100 tons. At Padun Falls at the outflow from Lake Notozero the skolt sami had rights to catch salmon in a large weir, and every year tens of tons of salmon was caught at this site alone.
When the hydro power plants was built the salmon spawning grounds and migration routes was destroyed. At the first power plant, the Lower Tuloma, a well functioning fish ladder was built after a few years, and after a while the salmon catch was approaching its former size. But when the Upper Tuloma plant and the dam at Verkhnetulomskiy was built the salmon stock collapsed. Lake Notozero became part of the large Verkhnetulomskoye reservoir, and the Padun Falls was gone. A fish lift was built at the dam, but it did not work and was closed down after a short time. There remains, however, a small salmon stock in the Toluma, spawning in the tributaries below the dam, especially in the Pecha. (tuulomajoki.fi)
There is a project under way to ascertain whether it is possible to reestablish the salmon to the river, by allowing the fish to pass the dams and thus reaching spawning grounds in the tributaries above the reservoirs, which are still in their natural state. It is hoped that this will bring substantial benefits to the region, through recreational fishing and eco-tourism. (Tuloma River Project)
