Systematic observations of surface water pollution have been carried out since 1966. Currently, these observations cover 44 water bodies: 30 rivers, 9 lakes, 4 watercourses and 1 port.
Snow removal works have been carried out on the territory of Azerbaijan since 1950. Surveying works are carried out in the mountainous areas of the Big and Little Caucasus, along 28 routes, in the basins of 20 rivers.