ASSESSMENT OF DATA MONITORING OF THE GROUND WATERS REGIME ON THE ODESSA REGION TERRITORY

Abstract

AbstractProblem Statement and Purpose. The problem of land flooding has become especially important in Ukraine in recent decades. The purpose of the work is to identify the features of the spatial and temporal regime of the groundwater level in natural and technogenic conditions in the territory of the Odessa region; to establish the connections between groundwater levels and climatic (atmospheric precipitation) and astronomic (axis rotational velocity of the Earth) factors.Data & Methods. The work is based on observations of the annual average levels of groundwater and atmospheric precipitation for period 1965-2014, the data of the speed of axial rotation of the Earth and climatic indices were used. 21 wells were selected for statistical processing. They cover the entire territory of the area. The processing and display of statistical information was earned out using Microsoft Excel, Statistica and Surfer programs. The methods of multivariate scaling, correlation, regression, spectral, mutual spectral analysis and mapping were used. Results. Flooding is one of the ecological problems of the Odessa region, about 40% of its territory is affected by this process. Favorable conditions for the development of the flooding process exist on the territory of the region. The precipitation field is due to the processes occurring in the North Atlantic and expressed by the climatic index NAF (North Atlantic Fluctuation). The connection of the groundwater level and atmospheric precipitation has a complex nonlinear character. The statistical series are non-stationary. Atmospheric precipitation is not the main factor that affects the dynamics of groundwater. The connection of the groundwater level with precipitation in the winter period is detected in 15% of wells. The dynamics of groundwater level is controlled by such an astronomical factor as the speed of axial rotation of the Earth.It causes a change in the hydraulic efficiency of structural and tectonic drains. The model of rotational exotectogenesis for the territory not only in Odessa (Shmuratko, 2001), but for the Odessa region is confirmed. Continued monitoring of the ground water regime will improve the quality of statistical methods for forecasting flooding process.