The hydrological network consists of 377 observation points, including: 329 river posts (conducting observations on 216 rivers, 1 stream, and 3 canals); lake posts – 38 (conducting observations on 20 lakes and 8 reservoirs); sea posts – 7; sea hydrometeorological posts – 3 (conducting observations at sea). For more detailed information, see the 'Annotation' section.