Population dynamics:
Population dynamics:
- source 
- mouthThe source is Syamozero . It flows into Vagatozero through which Shuya flows. The length of the river is 36 km, the catchment area is 1810 km² [2] . Tributaries of the Syapsya River: right: 5 tributaries of the b.n., r. Alkhonoy, p. Revzuno, influx of b.n .; left: 2 tributaries of b.s. (there are more right tributaries, therefore, there is a higher elevation from the right bank). Nearby swamps: on the right: Niututsuo; left: Chuvnoisuo, Syapsyasuo, Kivoyansuo (there are more swamps on the left bank, there are lowland places). Thresholds: bn threshold, bn threshold, Gorbunkoski, Sarikoski. Bridges: railway, automobile, log "Manin bridge" on the old road Syamozero - Syanga - Kindasovo - Yarn.
According to the state water register of Russia, it belongs to the Baltic Basin District , the water sector of the river is Shuya , the river sub-basin is Svir (including the rivers of the Onega Lake basin). Refers to the river basin of the Neva River (including the river basins of the Onega and Lake Ladoga) [2] .
The code of the object in the state water registry is 01040100112102000014455 [2] .
The Syapsya river was used for the mole alloy of the forest until 1963. The timber was harvested on the shores of Lake Syamozero and on the banks of rivers and streams flowing into it (Malaya Suna, Sudak, Kivach, etc.). Then the logs were rafted along the lake to the source of the Syapsya river, down the river to the mouth in Lake Vagatozero, then down Shuya to its mouth in Lake. Logmozero, where the Solomensky timber mill is located (near Petrozavodsk). In some areas, the carriage was carried out by tugboats. In the 1980s, work was carried out to clean the bottom of the river from fuel.
A description of Lake Syamozero, which mentions the Syapsya River, is in volume 32 of the Brockhaus and Efron Encyclopedic Dictionary on p. 411 [3] . The article refers to the Syam river flowing from the Syamozero and flowing into the Sagozero Lake, through which the Shuya River flows. As you know, such a river is the only one - Syapsya. The name Xiang is still often found on maps and in the water registry. It can be assumed that the Syapsya River originall
