Modelling of Contaminant Mass Transport in Groundwater Flow Polluted by Sulphuric Goudron Pools of Incukalns
Datormodelēšana un robežproblēmas 2016
Aivars Spalviņš, Kaspars Krauklis, Inta Lāce, Tatjana Sorokina, Henning Wallner

sulphuric acid and oil products). The dump sites were named as the Northern and Southern pools. The Northern pool was filled by sand. Presently, the Southern pool contains goudron as a liquid, a paste and a stone. During sixty years, the pools are polluting groundwater that moves towards the Gauja river. Excavation of the goudron body of the Southern pool continues. The contaminated sand of the Northern pool will be taken away. In order to optimize the ongoing process of environmental recovery of the place, specialists of Riga Technical university carried out computer based modelling of mass transport of contaminants (especially surface active substances (SAS)) by the groundwater flow. The research was done as the task drawn up by the company INTERGEO. It was found out that the SAS plumes of the Northern and Southern pools will reach the river, after 25 and 80 years (since 2015), accordingly. The SAS mass of the plumes was evaluated, respectively, 8000kg and 30000kg, for the Northern and Southern pool in 2015.The rate of the SAS inflow from the Northern pool plume into the Gauja river was estimated during 2039-2099 if no SAS destruction took place: 660kg – (2039-2054); 2800kg – (2059-2079); 4000kg – (2079-2099). After 2119, the mass of zone SAS plume will be 540kg. The unevenness of the SAS inflow rate is due to the small SAS concentration for the exterior part of the plume than for its central part. This fact was also confirmed by hydrographs for the SAS concentration of the virtual monitoring wells. It was found out that the SAS inflow into the Gauja river will have no real influence (even without SAS destruction) on the quality of water of the river, because its flow is much more stronger than of the contaminated groundwater flow from the Northern pool. Keyword: hydrogeological model, modelling of contaminant mass transport, surface active substance


Keywords
hidroģeoloģiskais modelis, masas transporta modelēšana, virsmas aktīvās vielas

Spalviņš, A., Krauklis, K., Lāce, I., Sorokina, T., Wallner, H. Modelling of Contaminant Mass Transport in Groundwater Flow Polluted by Sulphuric Goudron Pools of Incukalns. Datormodelēšana un robežproblēmas, 2016, 55, pp.19-27. ISSN 2255-9124. e-ISSN 2255-9132.

Publication language
Latvian (lv)
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