The birds of Pasvik / E. I. Khlebosolov, O. A. Makarova, O. A. Khlebosolova [et al. ; English transl. Nikita Chernetsov]. - Ryazan : Golosgubernii, 2007. - 175 с. : ил., портр.

Physical Geographic Characteristic of the Study Area The Pasvik valley and adjacent areas are situated in northern Fennoscandia. The valley runs from the southwest towards the northeast along the Pasvik river from its source, Lake Inari, to the estuary which is Bek fjord o f the larger Varanger fjord o f the Barents Sea and has the total length o f ca. 150 km. Pasvik is a lake and river valley typical o f northern Kola Peninsula formed by the Pasvik river and its tributaries: Nautsijoki, Sejgijoki, Laukkujoki and by large and small lakes and lake-lake dilutations (Atlas... 1971). The width o f the Pasvik river varies between 200 m near Jordanfoss and 4 km near Vaggatem. Its depth is 1 m at stretches o f Hejuhenjarvi lake-like dilutation and 21 in water reservoirs. The total area o f the catchment basin is ca. 32 700 km3(State water cadastre 1989). The Pasvik river has mainly snow supply with a significant pro­ portion o f rain and underground drain. The annual variation o f the water level is char­ acterised by spring tide, high water in autumn and low stage in summer and winter. The altitude difference between the source and the mouth is 119.6 m, fall rate 80 cm k n r 1, intensity o f flow up to 180 m ’-s '. Large flow intensity and the presence of never-freezing rapids made it possible to build the Pasvik tandem reservoir system including five Russian and two Norwegian water power stations. Earlier the Pasvik river consisted o f a chain o f large lakes connected by channels with picturesque falls and rapids, but now its flow is controlled. In the middle flow there are many large bays and dilutations that are called lakes: Vouvatusjarvi, Bossojarvi, Salmijarvi.