Analysis of Сauses of Colmatage and Corrosion of Water-Intake Well Equipment under Conditions of Increased Anthropogenic Load

Summary

In the course of operation of water intakes from underground sources the problems associated with the processes of fouling and corrosion of the metal equipment of artesian wells inevitably increase. The intensity of deposit formation and corrosion development on the well equipment depends on the well output, the chemical composition of ground water, the presence of methane-producing and other bacteria generating an extremely active corrosion medium. Monitoring of the chemical composition and microbiological analysis of ground water make it possible to identify the causes of colmatage and corrosion of metal-containing elements of the wells under the conditions of the increased anthropogenic load, which further facilitates the selection of methods of struggle against these phenomena.

Key words

monitoring , ground water , artesian well , colmatage , corrosion , anthropogenic load , bacteria , microbiological analysis

Artesian wells of the Moscow region of the 19th–20th centuries

Summary

A historical review is presented that describes the results of the completed stage of work on the search and study of underground water intake structures of the pre-revolutionary period in the Moscow Region. The materials presented concern mainly the so-called «artesian wells». These structures are scarcely covered in modern professional books. By design these wells had a large diameter and depth and were located above artesian boreholes. Their construction was caused by the need to place large-sized pumping units that were an integral part of the process of constructing an artesian well. The article presents a brief overview of such underground water intakes that existed as part of the city water pipelines in Moscow, documentary information on the methods of their construction, as well as a description of the artesian well discovered by the authors in Serpukhov, Moscow Region.

Key words

pump unit , artesian well , ground water source , design of the wells , shaft well , drill unit

Methods of Struggle with Consequences of Colmatage and Corrosion of Water-Intake Well Equipment

Summary

The main problems encountered in the process of operation of water-intake wells are corrosion of water-lifting equipment and development of colmatage processes in the filters and in the zones of aquifers near the filters and, as consequence, decrease in output. One of the most acceptable variants of solving this problem is the use of glass-plastic pipes and polymeric filters. The experience in the use of up-to-date non-corrosive materials, the regeneration of wells using the reagent method making it possible to increase their output and to prolong the operation time is considered.

Key words

artesian well , colmatage , hydrogeochemical conditions , non-corrosive materials , chemical method of regeneration