Training Manual . Leningrad: LPI, 1979. 60 s. Issues of the current state of water resources, water consumers and their requirements for the quantity and quality of water are considered. The main attention is paid to the consideration of changes in water resources under the influence of economic activity, hydrological factors of water quality formation and methods of its calculation. Summary of the principles. water quality rationing for different water users and wastewater treatment methods, the basics of water legislation and the list of measures to control the use of water. For students-hydrologists of hydrometeorological universities and geographical faculties of state universities .