A FLOW AND TRANSPORT MODEL AS A TOOL FOR SOLVING THE PROBLEM OF GROUNDWATER POLLUTION IN THE VICINITY OF CELSA HUTA OSTROWIEC

2018 ◽  
Vol 471 ◽  
pp. 147-158
Author(s):  
Grzegorz SINICYN ◽  
Maria GRODZKA-ŁUKASZEWSKA
Keyword(s):  
Environmental Problem ◽  
Transport Model ◽  
Water Environment ◽  
Three Dimensional ◽  
Pollution Source ◽  
Transport Models ◽  
Flow And Transport ◽  
Model Studies ◽  
Contaminant Release ◽  
Soil And Water

The article presents the environmental problem that occurred in the vicinity of Celsa Huta Ostrowiec, where concentrations of trichloroethene and tetrachloroethene in wells were detected. The three-dimensional numerical groundwater flow and transport models were calibrated against trichloroethene measurements. Model studies were carried out for different scenarios taking into account the type of pollution source (point and spatial distributed) and the nature of the source itself (incidental and continuous in time). The modelling results made it possible to indicate the most likely place and time of contaminant release into the soil and water environment.

scholarly journals On the ability of chemical transport models to simulate the vertical structure of the N<sub>2</sub>O, NO<sub>2</sub> and HNO<sub>3</sub> species in the mid-latitude stratosphere

2005 ◽  
Vol 5 (6) ◽  
pp. 12373-12401
Author(s):  
G. Berthet ◽  
N. Huret ◽  
F. Lefèvre ◽  
G. Moreau ◽  
C. Robert ◽  
...  
Keyword(s):  
Transport Model ◽  
Three Dimensional ◽  
Chemical Transport ◽  
Chemical Transport Model ◽  
Transport Models ◽  
One Dimensional ◽  
Chemical Transport Models ◽  
Dimensional Version ◽  
The Impact

Abstract. In this paper we study the impact of the modelling of N2O on the simulation of NO2 and HNO3 by comparing in situ vertical profiles measured at mid-latitudes with the results of the Reprobus 3-D CTM (Three-dimensional Chemical Transport Model) computed with the kinetic parameters from the JPL recommendation in 2002. The analysis of the measured in situ profile of N2O shows particular features indicating different air mass origins. The measured N2O, NO2 and HNO3 profiles are not satisfyingly reproduced by the CTM when computed using the current 6-hourly ECMWF operational analysis. Improving the simulation of N2O transport allows us to calculate quantities of NO2 and HNO3 in reasonable agreement with observations. This is achieved using 3-hourly winds obtained from ECMWF forecasts. The best agreement is obtained by constraining a one-dimensional version of the model with the observed N2O. This study shows that modelling the NOy partitioning with better accuracy relies at least on a correct simulation of N2O and thus of total NOy.

3D hydrogeological modeling of Deep Geological Disposal in the Nizhnekansky Rock massif

2020 ◽  
Author(s):  
Georgii Neuvazhaev ◽  
Alexander Rastorguev ◽  
Oleg Morozov ◽  
Ivan Kapyrin ◽  
Fedor Grigorev
Keyword(s):  
Groundwater Flow ◽  
Three Dimensional ◽  
Model Verification ◽  
Structural Elements ◽  
Three Dimensional Model ◽  
Hydrogeological Model ◽  
Transport Models ◽  
Geological Disposal ◽  
Flow And Transport ◽  
Deep Geological Disposal

&lt;p&gt;Russian Federation has a selected site for Deep Geological Disposal in the Nizhnekansky massif (Krasnoyarsk territory). The current work is devoted to justification of its suitability. One of the main parts of the safety case of is the prediction of radionuclides migration in the environment which requires development and application of groundwater flow and transport models. This work presents the evolution of the hydrogeological model.&lt;/p&gt;&lt;p&gt;The granitoid rock of Nizhnekansky massif is complicated by presence of such geological structural elements as dykes, faults and crushing zones which influence significantly permeability features. Currently all available geological data are consolidated with the use of the MICROMINE program into a structural geological model. The three-dimensional model of the distribution of the main structural elements in the area of the DGD site is more detailed. The corresponding dykes appear to have a north trend and a steep fall (about 70 &amp;#176; east).&lt;/p&gt;&lt;p&gt;Using the geometry of structural elements one can assess their role in the structure of groundwater flow on the basis of profile model. Verification of the model was carried out on the basis of measured hydraulic heads.&lt;/p&gt;&lt;p&gt;The preliminary calculations showed that including into the model additional structural elements (to a greater extent dykes and crushing zones) leads to a better matching between observed and model heads. This implies the need to take into account the structural elements&amp;#160; more accurately. The migration of a conservative tracer was calculated as well using the developed flow model.&lt;/p&gt;&lt;p&gt;Moreover, the heterogeneity near the Deep Geological Disposal is three-dimensional in nature and it is impossible to implement it accurately in a two-dimensional setting without approximations. This requires three-dimensional modeling, such 3D numerical flow and transport models are developed using the GeRa code.&lt;/p&gt;

scholarly journals On the ability of chemical transport models to simulate the vertical structure of the N<sub>2</sub>O, NO<sub>2</sub> and HNO<sub>3</sub> species in the mid-latitude stratosphere

2006 ◽  
Vol 6 (6) ◽  
pp. 1599-1609 ◽  
Author(s):  
G. Berthet ◽  
N. Huret ◽  
F. Lefèvre ◽  
G. Moreau ◽  
C. Robert ◽  
...  
Keyword(s):  
Transport Model ◽  
Three Dimensional ◽  
Chemical Transport ◽  
Chemical Transport Model ◽  
Transport Models ◽  
One Dimensional ◽  
Chemical Transport Models ◽  
Dimensional Version ◽  
The Impact

Abstract. In this paper we study the impact of the modelling of N2O on the simulation of NO2 and HNO3 by comparing in situ vertical profiles measured at mid-latitudes with the results of the Reprobus 3-D CTM (Three-dimensional Chemical Transport Model) computed with the kinetic parameters from the JPL recommendation in 2002. The analysis of the measured in situ profile of N2O shows particular features indicating different air mass origins. The measured N2O, NO2 and HNO3 profiles are not satisfyingly reproduced by the CTM when computed using the current 6-hourly ECMWF operational analysis. Improving the simulation of N2O transport allows us to calculate quantities of NO2 and HNO3 in reasonable agreement with observations. This is achieved using 3-hourly winds obtained from ECMWF forecasts. The best agreement is obtained by constraining a one-dimensional version of the model with the observed N2O. This study shows that the modelling of the NOy partitioning with better accuracy relies at least on a correct simulation of N2O and thus of total NOy.

Groundwater flow and transport model of the Estonian Artesian Basin and its hydrological developments

2016 ◽  
Vol 47 (4) ◽  
pp. 814-834
Author(s):  
L. Vallner ◽  
A. Porman
Keyword(s):  
Transport Model ◽  
Water Environment ◽  
Three Dimensional ◽  
Computer Code ◽  
Base Flow ◽  
Visual Modflow ◽  
Artesian Basin ◽  
Dimensional Distribution ◽  
Groundwater Exchange ◽  
Continental Glaciation

The sophisticated research and management problems of the Estonian water environment are considered by means of holistic modelling. The model elaborated is based on the computer code Visual MODFLOW Classic. The model encompasses the entire Estonian Artesian Basin (EAB) and the border districts of Russia and Latvia. It involves all main aquifers and aquitards on an area of 88,000 km2. The main hydrogeological and hydrological characteristics of the study area, including the time-dependent three-dimensional distribution of groundwater heads, the direction, velocity and rate of subsurface fluxes, itemised water budgets, volumes of hydrogeological units, and durations of groundwater exchange have been determined by modelling. The palaeohydrological situation during the last continental glaciation of the EAB was reconstructed and the principal problems of the sustainable management of water environment were elucidated. The model has been used to simulate the local and cumulative rates of the base flow.

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