DBPapers
DOI: 10.5593/SGEM2015/B11/S1.062

THE STRUCTURES CONTROLLING THE HYDROCARBON POTENTIALITY OF KASHAGAN FIELD, SOUTHERN PART OF PRE-CASPIAN DEPRESSION, KAZAKHSTAN

A. S. Abdelmaksoud , O. Y. Soviyetovich, A. G. Yusupkhanovna, S. L. Bakhtiyarovna, A. A. Shukmanova
Tuesday 4 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-31-5 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 1, 493-500 pp

ABSTRACT
Water bodies found in antropogenically-transformed areas tend to be contaminated by biogenic substances. Nutrients present in the water and in the deposits fuel the growth of vegetation on the banks and thus contribute to the production of matter that accumulates primarily in the littoral zone. This study investigated how vegetation contributes to the filling-up of the basins of such water bodies. The research was conducted in an area containing 39 water bodies in 26 locations of the southern Polish region of Upper Silesia and Zagłębie. The ponds ranged in area from 1 hectare to 561 hectares (arithmetic mean of 115 ha, median – 0.32 ha). The study found that vegetation encroached over between 1.7% and 80% of the original water area, with the mean of 21% and the median of 14.3%. The highest proportion of vegetation overgrowth was normally found in small and typically also shallow ponds. The amount of overgrowth can be converted into the volume of biomass produced, which contributes to the sedimentation and increases the amount of deposits. The volumes of biomass vary depending on the phase of the vegetation growth during the year. At the peak of the growth period, the study found that the amount of dry mass of the vegetation in the ponds varied from 7.1 kg/m2 and 17.5 kg/m2, with the average of 10.4 kg/m2 and the median of (9.9 kg/m2). In absolute numbers for all the ponds in the study this comes up to between 8 tons and nearly 8 thousand tons. These figures attest to a great potential that vegetation can contribute to the building up of bottom sediments. The study suggests that the role of vegetation in the filling-up of the pond basins has been underestimated.

Keywords: water body, vegetation, bottom sediments, littoral zone, Upper Silesia and Zagłębie region, southern Poland

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