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Geostatistical hydrogeochemical 3D model for Kłodzko underground water intake area. Part I., Estimation of basic statistics on quality parameters of underground waters

Namysłowska-Wilczyńska B.

Studia Geotechnica et Mechanica

2013

Vol. 35, nr 1

157--182

The paper presents the first stage of research on a geostatistical hydrogeochemical 3D model dedicated to the horizontal and vertical spatial and time variation in the topographical, hydrological and quality parameters of underground water in the Kłodzko water intake area. The research covers the period 1977–2012. For this purpose various thematic databases, containing original data on coordinates X, Y (latitude and longitude) and Z (terrain elevation and time – years) and on regionalized variables, i.e., the underground water quality parameters in the Kłodzko water intake area determined for different analytical configurations (22 wells, 14 wells, 14 wells + 3 piezometers), were created. The data were subjected to spatial analyses using statistical methods. The input for the studies was the chemical determination of the quality parameters of underground water samples taken from the wells in the water intake area in different periods of time. Both archival data (acquired in the years 1977–1999, 1977–2011) and the latest data (collected in November 2011 and in January 2012) were analyzed. First, the underground water intake area with 22 wells was investigated. Then in order to assess the current quality of the underground water, 14 wells out of the 22 wells were selected for further chemical analyses and a collection siphon wall was included. Recently, three new piezometers were installed in the water intake area and so new water samples were taken, whereby the databases were supplemented with new chemical determinations. The variation in the topographical parameter (terrain elevation) and in the hydrogeological parameters: water abstraction level Z (with and without the land layout being taken into account) and the depth of occurrence of the water table, was examined. Subsequently, the variation in quality parameters was studied on the basis of data coming from 22 wells, then 14 wells and finally from 14 wells and 3 piezometers. The variation in: Fe, Mn, ammonium ions NH4+, nitrite anion NO3 – and phosphate anion PO4 –3 content values, total organic carbon (TOC) C content, the pH reaction and temperature (°C) of the water was investigated. The basic statistics and distribution histograms of the topographical, hydrogeological and quality parameters (22 wells, 14 wells, 14 wells + 3 piezometers; the years: 1977–1999, 2011, 2011–2012) were estimated and detailed characteristics of the variation in the parameters in the whole underground water intake area over the years were obtained. Generally, the behaviour of the underground water quality parameters has been found to vary in space and time. Thanks to the multidirectional spatial analyses of the variation in the quality parameters in the Kłodzko underground water intake area some regularities in the variation in water quality have been identified.

Model oddziaływania z utworami izolującymi CO2 zatłaczającego do poziomów wodonośnych karbonu GZW

Labus K.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

2008

z. 285

137-150

Zaprezentowano hydrogechemiczny model oddziaływania CO2 ze skałami izolujacymi potencjalne repozytorium sekwencyjne dwutlenku węgla w obrębie serii paralicznej. Modelowanie kinetyki reakcji przeprowadzono dla przedziału czasowego 20000 lat. Oszacowano ilość wiązanego dwutlenku węgla, zmiany porowatości skał izolujących oraz określono zmiany składu mineralogicznego matrycy skalnej na skutek kontaktu z zatłaczanym CO2.

The paper presents a hydrogeochemical model of carbon dioxide impact on rocks insulating a possible CO2 repository within the Paralic Series of the Upper Silesian Coal Basin. The conceptual model of hydrogeological was set basing on mineralogical analyses, pore space characteristics and chemical analyses of groundwater representing the Paralic Series. Modeling the kinetic reactions comprised the period of 20000 years. Modeling results comprise quantities of sequestered gas, changes in insulating rocks' porosity, and characteristics of mineralogical transformations of the rock matrix due to the contact of the CO2 injected.