FACTORS AND DYNAMICS OF VARIABILITY OF ZMEINYI ISLAND ROCKS FILTRATION PROPERTIES
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2017, Vol 22, Issue 2
Abstract
Problem Statement and Purpose. Transmissivity (T) is one of the most important parameters in determining aquifer productivity and generally estimated from pumping tests. This study (for the period 01.2005-04.2008) focuses on the transmissivity behavior dynamic for pressure fractured-rock aquifer in the Devonian deposits of the Zmeinyi island. It presents a temporal variations in transmissivity under the influence of sea level, distance Earth-Moon and axial rotation of the Earth. Data & Methods. In the paper have studied the data from the experimental pumping test of the exploited well No 2, situated in the northwestern part of Zmeinyi island, having a depth of 50 m. Time-recovery plots (270 plots) were analyzed by using Theis Jacob method to obtain transmissivity. The geologic setting in the study area is generally composed of the Paleozoic deposits, including the Silurian and Devonian, as well as the Cenozoic formations. The lithology of the aquifer varies widely and includes conglobreccia, sandstone, conglomerate, mudstone and siltstone. By results of well logging tests for water-bearing rocks the following thickness intervals were established: 38.0-54.6 m; 57.6-74.0 m; 80.8-109.4 m. Within the upper interval represented by conglomerates, there are two aquifer subhorizons, separated by weakly fractured rocks, that is by relatively waterproof layer. A comparison of water-bearing rocks depth intervals and static water levels shows that ground water in the upper subhorizon is under pressure. Results. On the basis of a cross-spectral analysis of time series (using frequency transfer functions, coherence spectra and phase difference) correlations were revealed between variations of transmissivity and the following factors: sea level, mean Earth-Moon distance, Earth rotation speed. Variations in the correlation between transmissivity and factors influencing it allow assessing stress-strain state of water-bearing rocks. The results obtained from cross-spectral analysis showed that in the low frequency range, transmissivity is related to these factors linearly. In the range of periods from 5.5 to 11 days the Earth-Moon distance increases, the transmissivity value decreases and vice versa, with decreasing Earth-Moon distance (T) increases. For the same periods for accelerated motion of the Earth (T) increases, and vice versa, a decrease in Earth’s rotation speed is accompanied by a decrease of (T). For the sea level, for periods from 5.5 to 11 days, transmissivity is in the antiphase with sea level variations. The increase in sea water level corresponds to a decrease of (T) and decrease of sea water level corresponds to increase of (T).
Authors and Affiliations
D. V. Melkonyan, Ye. A. Cherkez, O. O. Smyrnova
Keywords
Related Articles
- EP ID EP342054
- DOI -
- Views 86
- Downloads 0
SALT AND CARBONATE REGIMES OF SOUTHERN C HERNOZEM IN THE DRIP IRRIGATION CONDITIONS
Problem Statement and Purpose. Drip irrigation is used more widely for cultivation of agricultural crops in the Steppe of Ukraine. Influence of this method of moisture supply on the southern chernozems and patterns of th...
KRINICHANSKY EDUCATIONAL AND SCIENTIFIC RESEARCH CENTER IS 35 YEARS
Purpose. The aim of this study is to analyze the complex physiographic research conducted on the territory of Krinichansky physical-geographical educational and scientific research center of Faculty of Geology and Geogra...
ACTUALS PROBLEMS OF THE RESEARCH OF WORLD OCEAN LEVEL
The features of the sea level changes and the related dynamics of the coastal zone are the subject of the discussions in the economic planning as in the regionally as in globally scale. The work’s purpose is analysis of...
CHANGES IN SOIL CARBON AND NITROGEN DYNAMICS DURING A THREE YEAR CROP ROTATION ON A CHERNOZEM SOIL IN THE SOUTHERN UKRAINE
Soils in the southern Ukraine have been reported to have lost 32% to 40%, or 51 to 71 t ha-1 of their original soil organic matter (SOM) pool between 1881-1981, mainly due to inappropriate soil management by collective f...
HISTORY OF THE DEVELOPMENT OF MARINE GEOLOGY AT ODESSA UNIVERSITY
The beginnings of Odessa I. I. Mechnikov National University (ONU), Ukraine, date back to 1865. Its Department of Physical and Marine Geology continues the school’s strong tradition in marine geological research. This pa...