Modeling of groundwater flow and transport of pollutants caused by a difference in groundwater densities (on the example of the valley of Vulche dere creek, downstream of Eleshnitsa tailings pond)

Author:

Kotsev Tsvetan1,Kolev Sava2,Hristov Vladimir2

Affiliation:

1. Sofia University “St. Kliment Ohridski”. Faculty of Mathematics and Informatics

2. Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Abstract

An attempt is made to model numerically the transport of dissolved substances caused by a difference in groundwater densities. It is supposed that initially at the surface of the aquifer a sector exists with high concentration of а pollutant (sulphates) while it is zero elsewhere in it. As a result, there is a higher water density near the surface. Due to this difference, a density driven flow arises and starts slow upwelling and downwelling movement of the water. The pollution located initially at the surface moves down and after a period of time reaches the bottom of the aquifer. Unsteady Darcy equation for creeping subsurface flow and mass transfer equation in a porous media were solved simultaneously in 2D area by the finite element method. The geometry of the area used in the calculations follows approximately the real contour of the aquifer. The aim of this study is to predict time needed for given amount of pollution coming from surface water into Quaternary aquifer to reach the lower Neogene aquifer. Plots representing the streamlines of the flow and concentration spreading for different times are shown.

Publisher

Geological Institute, Bulgarian Academy of Sciences

Reference15 articles.

1. Andrizhievskiy, A. 2014. Mechanics of liquids and gases. Vyishaya shkola, Minsk, 208 p. (in Belarusian).

2. Antonov, D. 2017. Assessment of strontium transport in clay medium by using a reactive transport modelling approach - an HP1 case study model. Geologica Balcanica, 46(2), Sofia, 23-26.

3. Antonov, D., D. Karastanev, D. Mallants. 2012. Determination of soil hydrological parameters of a multi-layered loess complex using HYDRUS-2D and field infiltration experiments. Compte rendus de l’Ácademie bulgare des Sciences, 65, 12, 1717-1724.

4. Benderev, A., V. Spasov, N. Kostova, T. Kotsev, V. Nikolov, A. Mitev, V. Stoyanova, E. Damyanova, K. Kroumova, I. Pandurski, A. Toteva, M. Trayanova. 2017. Arsenic contamination of Kobilyak karst spring, NW Bulgaria – state and reasons. National Conference with international participation “GEOSCIENCES 2017”, Short Communications, 133-134 (in Bulgarian with English abstract).

5. Elder, J.W. 1967. Тransient Convection in a Porous Medium. J. Fluid Mech., 27, no.3, 609-623.

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3