Authors: D.V. Purgina, K.I. Kuzevanov

Title of the article: Methods analysis of evaluation of underground water on an example of Nikitinsky deposit (Kuzbass)

Year: 2018, Issue: 1, Pages: 46-57

Branch of knowledge: Earth sciences

Index UDK: 556.34

DOI: 10.26730/1999-4125-2018-1-46-57

Abstract: Relevance of the research topic. Underground waters of the Kuznetsk coal basin play an exceptionally im-portant role in economic activity. They are widely used for water supply to industrial centers and settlements, determining the location of the productive forces of the Kemerovo region, they are of great importance in the development of coal, ore and other mineral deposits. Justification of technological schemes of rational water supply to industrial regions of Kuzbass is currently one of the most urgent problems. The water balance of the territory is significantly affected by the technogenic component associated with the redistribution of water resources under the influence of mine drainage at coal enterprises and the operation of water intake for drinking and technical water supply. In complex hydrogeological conditions, among the existing methods for calculating groundwater reserves, the priority is the application of numerical hydrodynamic modeling for these purposes. The purpose of the study is to develop a numerical model of the filtration area in the water intake area in order to justify the operational characteristics of production wells based on geological exploration data on groundwater and to assess the balance characteristics of the filtration flow in disturbed hydrodynamic condi-tions under the influence of external boundary conditions. The main objectives of the study: - Reproduce on a numerical model the structure of the filtration flow in the natural conditions of the operational aquifer; - Assess the distribution of head and flow rates of the filtration flow under the influence of the operation wells with a projected total capacity of 1500 m2 / day at the end of the calculation period (25 years). Research Methodology: The main method for estimating the balance characteristics of the filtration flow under natural and disturbed conditions is the hydrodynamic simulation using the MODFLOW solver, which implements the algorithm for the numerical solution of the differential equation of nonstationary planar filtration using the finite difference method. As an auxiliary means of preliminary preparation of the initial data for development of the model of the water intake area, Surfer and AutoCad software complexes were used. Results of the study a numerical hydrodynamic model of the water intake area was developed, taking into account the operation mode of the interacting water intake wells and the complex nature of the boundary conditions of the site, which made it possible to clarify the calculation scheme adopted earlier in calculating groundwater resources. Based on the results of the predictive hydrodynamic simulation, it is established that the value of the level reduction in the wells does not reach the absolute level marks in the Ur River. Between the river and the boreholes, a local watershed is formed, which, if the water intake is used for a long time, can be shifted towards the river and introduces a clarification in

Key words: underground water supply infiltration recharge water inflow Kuzbassadartesian basin epignosic model predictive model boundary conditions water balance

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