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The FEM model of groundwater circulation in the vicinity of the Świniarsko intake, near Nowy Sącz (Poland)

Zdechlik Robert, Kałuża Agnieszka

Geologos

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2019

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Vol. 25, No. 3

255--262

EN

Modern hydrogeological research uses numerical modelling, which is most often based on the finite difference method (FDM) or finite element method (FEM). The present paper discusses an example of application of the less frequently used FEM for simulating groundwater circulation in the vicinity of the intake at Świniarsko near Nowy Sącz. The research area is bordered by rivers and watersheds, and within it, two well-connected aquifers occur (Quaternary gravelly-sandy sediments and Paleogene cracked flysch rocks). The area was discretized using a Triangle generator, taking into account assumptions about the nature and density of the mesh. Rivers, wells, an irrigation ditch and infiltration of precipitation were projected onto boundary conditions. Conditions of groundwater circulation in the aquifer have been assessed based on a calibrated model, using water balance and a groundwater level contour map with flow path lines. Application of the program based on FEM, using smooth local densification of the discretization mesh, has allowed for precise mapping of the location of objects that significantly shape water circulation.

2

Delineating spring recharge areas inferred from morphological, lithological, and hydrological datasets on Quaternary volcanic landscapes at the southern flank of Rinjani Volcano, Lombok Island, Indonesia

Setiawan Ogi, Sartohadi Junun, Hadi M. Pramono, Mardiatno Djati

Acta Geophysica

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2019

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Vol. 67, no. 1

177--190

EN

Springs are a vital source of water supply in Quaternary volcanic environments, such as Rinjani Volcano on Lombok Island, and yet little is known about their emergence and recharge areas. Knowledge of spring recharge area can substantially support further spring analysis and management. This study was performed in two spring zones on the southern flank of Rinjani Volcano. It combined the available morphological, lithological, and hydrological datasets to build a conceptual model of the spring recharge areas. According to the analysis results, the conceptual model allowed to describe the flow medium, the aquifer type, and the characteristics of the flow system. The local morphology controlled the direction and gradient of groundwater flow to the springs. The analysis also revealed that the spring water in the study area was meteoric water, which mainly came from rainwater infiltration. Therefore, the boundaries of the spring recharge areas were represented by the morphological divides.

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Wody podziemne Piwnicznej-Zdroju, ich wiek i obszary zasilania, według danych izotopowych

Porwisz B., Radwan J., Chowaniec J., Zuber A.

Biuletyn Państwowego Instytutu Geologicznego

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2011

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nr 445 Hydrogeologia z. 12/2

485--493

PL

Wody podziemne Piwnicznej-Zdroju są głównie szczawami typu: HCO3–Ca–Mg, HCO3–Ca–Mg–Na, HCO3–Mg–Na–Ca i HCO3–Na–Mg–Ca. W wodach współczesnych wśród kationów dominuje Ca2+, a w wodach przedwspółczesnych obserwuje się podwyższoną mineralizację i zwiększone zawartości Mg2+ i Na+. Granice obszarów zasilania wyznaczono na podstawie rozpoznanej budowy geologicznej i średniej wysokości ich położenia nad poziomem morza, oszacowanej z badań izotopowych.

EN

Therapeutical waters of the Piwniczna-Spa are of HCO3–Ca–Mg, HCO3–Ca–Mg–Na, HCO3–Mg–Na–Ca and HCO3–Na–Mg–Ca types, rich in CO2. In modern waters, Ca2+ dominates among cations whereas in older waters Na+ and Mg2+ dominate and mineralization is higher. Boundaries of the recharge areas were determined from the known geology and the mean elevation of recharge area estimated from the isotope data.

4

The thermal waters of Podhale, southern Poland: history of research, genesis and utility

Małecka D.

Geological Quarterly

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2003

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Vol. 47, No 2

195-210

EN

This paper outlines hypotheses relating the dip of Tatra strata beneath the Podhale Flysch to deep groundwater flow through the systems of fissures and karst caverns. Attempts by J. Gołąb and S. Sokołowski to constrain hypotheses through a series of exploratory-exploitational drillings led to the discovery in 1963 of thermal artesian waters in the Tatra foreland. These are of meteoric origin with total dissolved solids from 0.2 g/dm3 in the Tatra area to 3.0 g/dm3 in the central and near-Pieniny parts of the basin. Palaeogene strata are important in controlling the hydrogeology of the Podhale artesian basin. The Tatra Mountains are a recharge area for the Podhale basin whereas the Pieniny Klippen Belt seems to be an impermeable shield preventing further groundwater flow to the north. Within the southern flank of the basin the groundwaters are used as a local source of drinking water as well as to supply thermal baths in Zakopane. Furthermore, the geothermal energy from the Podhale basin provides a supply of clean, environment-friendly domestic heating.