Estimation of volume of flooded wood in r. Yenisei from the estuary of r. Mana to the station Krasnoyarsk forest complex

From 1931 to 1991, timber processing enterprises and the pulp and paper mill of the city of Krasnoyarsk were supplied mostly by water in bag booms from the Sliznevsky raid and the raid of the Krasnoyarsk timber-handling plant (THP).

Wood on the Sliznevsky raid came from the river Mana through the loose wood line, excluding the exit of the forest of passing wood on the ship channel. Therefore, the bulk of the sinker wood was located at the bottom of a narrow strip along the right bank of the r. Yenisei, the width of which did not exceed 100 m. Wood flowing through the Mana River to the mall pipe lost part of its buoyancy margin when rafting directly along the Mana River, passing through the loose wood line, finding it in the pool, in the course of sorting works, forming bag booms. Therefore, part of it settled on the bottom of the Yenisei River in the loose wood line and in the waters of the enterprises operating at that time. The article provides an estimate of the amount of sunken wood on the Yenisei River in the area from the village of Ust-Mana to the city of Krasnoyarsk, obtained when performing full-scale surveys of the coastal water area of the Yenisei River at the site of the previously loose wood line. In accordance with the studies carried out in the coastal waters of the right bank of the Yenisei River, from 65 000 to 88 000 m3 of timber were flooded in the section from the mouth of the Mana River to the Krasnoyarsk THP site within the city of Krasnoyarsk. Studies assessing the quality of flooded wood show that existing stocks of flooded wood mass may be involved in industrial production. The involvement in the production of significant volumes of wood mass will not only provide economic benefits, but also a tangible environmental effect from cleaning the waters of the Yenisei coastal zone.

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