Belarusian National Technical University, Minsk, Belarus:

V. V. Ivashechkin, Dean at the Power Facilities Construction Faculty, Doctor of Engineering Sciences, fes@bntu.by
V. I. Kritskaya, Assistant at the Chair of Hydraulic and Power Facilities Construction, Water Water Transport and Hydraulics
V. N. Anufriev, Head of the Water Supply and Water Disposal Chair, Candidate of Engineering Sciences
A. N. Kondratovich, Senior Lecturer at the Chair of Hydraulic and Power Facilities Construction, Water Water Transport and Hydraulics

The on-site investigation of groundwater intakes is carried out to obtain and update the actual parameters of the equipment and structures of a water intake, to optimize its operation modes with an analysis of their changes in time in order to plan maintenance and repair. This article discusses an improved methodology for examining individual elements and structures of groundwater intakes, which allows us to evaluate their current technical condition and to make a predictive calculation of changes in well productivity for the next period of operation based on the solution of the equations of dynamic equilibrium. The technique of clogging assessment allows determining ageing coefficients and approximate residual life of wells; the estimate of the rated pump pressure head reduction due to wear enables the pump testing during its operation at the well and timely replacement of the pump for routine repair; assessment of pipe sculling makes it possible to account for hydraulic resistance of lines connecting the wells to prefabricated water pipes during operation.

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