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UDC 628.1.036:543.3

Serikov L. V., Shiyan L. N., Tropina E. A., Khryapov P. A.

Peculiarities of Measuring of Chromaticity of the West Siberian Region’s Ground Water


Results of the experimental study aimed at determining the chromaticity of the West Siberian Region’s ground water sampled from a depth of 80–200 m with the use of the chromaticity measuring methods recommended by GOST R 52769-2007 are presented. Difficulties of the determination of chromaticity are associated with the features of the chemical composition of ground water and are due to the generation of stable colloidal particles consisting of Fe(OH)3 and dissolved organic substances of humus origin. It is established that the chromaticity of ground water generally depends on the presence of colloidal compounds of iron and is characterized as seemingchromaticity of water.

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UDC 628.113:624.131.41

Fomina V. F.

Water Humus Composition of the Vychegda River at Water Intake Site of the City of Syktyvkar


The Vychegda river is the main source of water supply for Syktyvkar. The water is characterized by low turbidity and high color, it contains ferrum and has low alkalinity and mineralization. During the autumn-winter period the water delivered to treatment facilities has a temperature of below 1 ºC. The swampiness of the river basin has an essential influence on water humus forming. The composition of humic substances adding the color to water is studied. It is defined, that fulvic acids compose the substantial part of humic substances. Color indices values for the main fractions of humic substances are defined. The influence of a seasonal composition and properties of humic substances and temperature conditions on water coagulation is proved.

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