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 88
- Downloads 0
DEVELOPMENT OF SOIL-GEOGRAPHICAL RESEARCHES AT THE ODESA UNIVERSITY (1933-2015 YEARS)
The purpose of research is an analysis of existing literature and archival sources on the development of soil-geographic researches in Odessa University during the 1933-2015 years. Methodology. The source base of researc...
THE ORIGINS AND USE OF THE TOPONYM GREAT ADZHALYK ESTUARY (BLACK SEA)
Problem Statement and Purpose. For the purposes of cartography and hydrography, geographical names of most estuaries in the northwestern part of the Black Sea have been standardized by the 1930s. Since that time, the geo...
MARINE GEOLOGY – ONE OF THE DRIVING FORCES OF SCIENTIFIC IDEAS UKRAINIAN ACADEMY OF SCIENCES ACADEMIC V. I. VERNADSKY AND THEIR IMPLEMENTATION IN THE FIELD OF GEOLOGY OF OCEANS AND SEAS IN UKRAINE
The article provides an historical section of scientific and applied developments marine geologists Ukraine who ideologically inspired Academician V. I. Vernadsky UAS for promotion of diverse ideas and now play a leading...
RESEARCH AND MAPPING OF TECHNOGENIC LOADING ON THE MODERN LANDSCAPES OF BELARUSIAN POLESYE
Purpose. The article considers the territorial differentiation of technogenic loading on the territory of Belarusian Polesye. Methodology. The mapping technique of technogenic loading on the natural and agricultural land...
DEPARTMENT OF SOIL SCIENCE AND SOIL GEOGRAPHY OF ODESSA NATIONAL UNIVERSITY CELEBRATES 50TH ANNIVERSARY!
Problem Statement and Purpose. The Department of Soil Science and Soil Geography was founded at the Geology and Geography Faculty of Odessa University half a century ago, in May 1967. The main task of the department resi...