Session K.pdf - Clarkson University

It was established, that first ice formations appear autumn and winter on shallow-waterlots in form of border and of primary ice in November, the thickness of fast ice achieves30 cm. In middle December the floating ices thickness about 40-45 cm cover practicallyall area of Gulf (7-8 balls), and end December increase these values respectively above70 cm and 9-10 balls. In period from January to April is covered the Gulf completelywith hummock ice (Karnovich and other, 1994) preferentially in form of big floe andfine- and large brash ice (Fig. 1) thickness about 1,4-1,5 m. The height of hummockachieves 4,0 m.Fig 1. The variety of ice formations in Tugur GulfThe development of ice masses to end of winter in conditions of constant moving byvelocity about 1 m/s provided tide about half of day durability (The tide power stations,1994) bring to occurrence of grounded hummocks (Fig. 2) and of floebergs height about3-4 m, there are also ice bulks. In mouth of r.Tugur near the Gulf (south part of theGulf) achieved width of fast ice is 2,5-3,0 km and the thickness is 1,5-1,7 m.The period of icebreaking continues in Tugur Gulf from May to August.The water salinity in Tugur Gulf is about 34‰, and the ice salinity is 6‰. In part ofOkhotsk sea lied near Tugur Gulf (West part of Tugur peninsula – to East of TugurGulf) in summer period was these values respectively 7,5‰ and 1,5‰.The received dates had permitted the further development of actions for prevent of unfavorableice influence on the Tugur tide power station.368