DBPapers
DOI: 10.5593/SGEM2014/B31/S12.034

EVALUATION OF THE HYDROCHEMICAL ELEMENTS OF THE WATER QUALITY IN THE WATER RESERVOIRS BY USING JOHNSON SB DISTRIBUTION

D. Kereselidze, K. Bilashvili, V. Trapaidze
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 263-266 pp

ABSTRACT
Recently, in the engineering hydrology, Johnson B S distribution has been increasingly used as a distribution law for average annual discharges of a flow. It is the first time the authors of the present paper have taken Johnson B S distribution as a distribution law for different elements of the water quality in the water reservoirs of Georgia including coastal waters of the Black Sea. The research has been conducted with the help of EU funded project “PERSEUS” and taking into account the principles of MSFD to diversify the methods of hydrochemical parameters analysis. Compared to other types of distribution, the advantage of Johnson B S distribution is that the given distribution describes the process of variation of different hydrochemical elements in the water pretty well, can take various forms, while plotting the curves of distribution density and provision is much easier with Johnson B S distribution than with other types of distribution. Besides, Johnson B S distribution has a simple relation with normal sequence and it is simple and convenient to model artificial series. One of the major issues with using Johnson B S distribution is the identification of the upper and lower limits of a random variable. Therefore, it is assessed in detail for different hydrochemical elements in a water reservoir. The limits of Johnson B S distribution for hydrochemical elements were assessed by method of choice provided the distribution curve of the statistical provision values was maximally close to the even distribution, and were later assessed with the Kolmogorov criterion.

Keywords: hydrochemical elements, distribution law