Sandimirov S.S. Catalogue of lakes in the Russian, Finnish and Norwegian Border Area. Finland, Jyvaskyla: Kopijyva Oy, 2008.

Table 9. Nickel has the highest Cfvalue. The degree of contamination value (82.6) for the lake The organic matter c0rresp0ncjs £0 И contamination. contents (LOI, %) and r 6 heavy metal concentra­ tions (цд/д, dry weight) and pre-industrial (19-20 cm) sediment layers. Cf and Cdare contamina­ tion factor and degree of contamination values, respectively. Lake Layer, cm LOI Cu Ni Zn Co Cd Pb As Hg cd Palojarvi 0-1 19-20 67.87 38.56 867 33 1494 41 91 101 63.5 16.3 0.68 0.17 7.3 3.2 17.50 4.57 0.194 0.037 c, 26.1 36.3 0.9 3.9 4.0 2.3 3.8 5.2 82.6 1.9.3. Hydrobiological studies No direct hydrobiological investigations have been carried out in this lake, but it most probably contains fish species such as dwarf burbot (Lota lota) and perch (Perea £u- viatilis). 1.10. LAKE PESCHANOE Lake Peschanoe (watershed of the River Shunijoki) is located at a distance of 6 km from the town of Nikel. It is a small (area of the lake 1.04 km2), shallow-water (maxi­ mum depth 5 m) round lake of glacial origin. The maximum length is 1.4 km, and maximum width 0.8 km. The point of maximum depth (5 m) is located in the central part of the lake. According to the landscape type, the watershed area belongs to the tundra zone with a height of 555.3 m (Saraslaki fell).The lakeshores are not high, and are rocky and covered with shrubs and birch stands. There are also areas covered with grass and shrub vegetation. The water of the lake is colourless. Boulder beds occur in almost all parts of the littoral zone, and extend down to depth of about 2-2.5 m. The gaps be­ tween the boulders are filled with peb­ bles. Physico-geographical characteristics Watershed River Shunijoki— Lake Kuetsjarvi— River Paz Latitude 69°22.126' Longitude 30°17.683' Height above sea level, m 274.9 Maximum length, km 1.4 Maximum width, km 0.8 Maximum depth, m 5 Area, m2 1.04 Watershed area, km2 9.75 Study period 1990-2004 1.10.1. Hydrochemistry The lake is one of the most polluted lakes in the Pechenga area owing to its close proximity to the Pechenganikel smelter. Airborne pollution has a major impact on the water quality. The water of the lake is close to neutral and the mean total mineralization is 27.8 mg/l and mean alkalinity 182 |_ieq/l. The lake has high concentrations of base cations and anions, calcium (average 4.26 mg/l) and bicarbonate (average 11.1 mg/l) predominating. 34 Catalogue ofLakes in the Russian, Finnish and Norwegian BorderArea