Description and Verification of the Contaminat Transport Models in Groundwater (Theory And Practice)

Abstract

This paper presents a general overview of 2D mathematical models for both the inorganic and the organic contaminants moving in an aquifer, taking into consideration the most important processes that occur in the ground. These processes affect, to a different extent, the concentration reduction values for the contaminants moving in a groundwater. In this analysis, the following processes have been taken into consideration: reversible physical non-linear adsorption, chemical and biological reactions (as biodegradation/biological denitrifi cation) and radioactive decay (for moving radionuclides). Based on these 2D contaminant transport models it has been possible to calculate numerically the dimensionless concentration values with and without all the chosen processes in relation to both the chosen natural site (piezometers) and the chosen contaminants.In this paper, it has also been possible to compare all the numerically calculated concentration values to the measured concentration ones (in the chosen earlier piezometers) in relation to both the new unpublished measurement series of May 1982 and the new set of parameters used in these 2D contaminant transport models (as practical verifi cation of these models).

Adsorption capacity of chosen sandy ground with respect to contaminants relocating with groundwater

“…The above-mentioned parameter values related to the measurement series of October 1982 differ from the ones related to the two earlier measurement series. One can say, for example, that in all cases the dispersion parameter values (D x , D y ) are smaller than those calculated in the two earlier measurement series (presented by Aniszewski 2009 andAniszewski 2013).…”

“…The updated numerical values of the K and N parameters are: K = 0.3098 m 3 • g -1 and N = 0.4978 for the chloride indicator and K = 1.0645 m 3 • g -1 and N = 0.7269 for the sulfate indicator, respectively. All these above numerical values of the K and N parameters differ (as smaller ones) from the K and N parameters related to the two earlier measurement series presented by Aniszewski 2009 andAniszewski 2013. So, using the parameters K and N, the general equation describing the dimensionless retardation factor (R) in equation (2) takes the form:…”

“…More details concerning both the applied numerical solution and method of numerical calculations used by the author are given by Szymkiewicz 2010, Aniszewski 2009and Aniszewski 2013.…”

“…2. Nonetheless, taking also into consideration the numerical values of (R a , u x /R a ) parameters for the two earlier series of November 1981 (Aniszewski 2009) and May 1982 (Aniszewski 2013), one can fi nally mention a gradual depletion in time of the adsorbing capacity for the analysed ground. This above-mentioned remark can only be related to a more or less one year period of time (as the series: November1981 -May 1982-October 1982, chosen indicators (i.e., chlorides and sulfates) as well as the fi ne sandy ground.…”

“…All of the calculations presented here concern the unpublished measurement series of October 1982. Additionally, the parameters calculated here (R a , u x /R a ) are also compared to the same parameters in relation to the two earlier measurement series for the same studied sandy ground presented by Aniszewski 2009(November 1981 and Aniszewski 2013(May 1982.…”