Long-term Water-rock Interaction in the Bohemian Cretaceous Basin (Central Europe): Field Evidence and Modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F17%3A00000347" target="_blank" >RIV/00025798:_____/17:00000347 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scitechnol.com/hydrogeology-hydrologic-engineering.phpJ" target="_blank" >https://www.scitechnol.com/hydrogeology-hydrologic-engineering.phpJ</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4172/2325-9647.1000155" target="_blank" >10.4172/2325-9647.1000155</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Long-term Water-rock Interaction in the Bohemian Cretaceous Basin (Central Europe): Field Evidence and Modelling

Popis výsledku v původním jazyce

Two models of reversible and irreversible water mineral interaction are developed to simulate geochemical evolution of old groundwater in the Cenomanian and Turonian sandstone aquifers in the Bohemian Cretaceous Basin in Central Europe. The kinetic constants of dissolution and equilibrium constants of reversible reactions are results of laboratory experiments published in literature. Reactive surface areas of minerals are calculated. The model simulates the evolution of the chemical composition of groundwater whose age was derived from isotopic data. The results are compared to the chemical composition of groundwater along the trajectory of the prevailing flow. The model represents the interaction between groundwater and sandstones containing quartz, amorphous silica, a mixture of clay minerals, calcite and traces of residual feldspars. The three processes of waterrock interaction are the irreversible dissolution of feldspars and carbonate, aluminium and silica equilibrium. The composition of groundwater in the Cenomanian aquifer with a confined water table is a result of geochemical evolution during the last 26,000 years, while the groundwater in the Turonian aquifer with a free water table is a mixture of old groundwater and recent water infiltrated from the surface. The proposed models are applicable to confined aquifers with residual rock matrix derived from granitic rocks decomposed by weathering without mixing of waters of different ages.

Název v anglickém jazyce

Long-term Water-rock Interaction in the Bohemian Cretaceous Basin (Central Europe): Field Evidence and Modelling

Popis výsledku anglicky

Two models of reversible and irreversible water mineral interaction are developed to simulate geochemical evolution of old groundwater in the Cenomanian and Turonian sandstone aquifers in the Bohemian Cretaceous Basin in Central Europe. The kinetic constants of dissolution and equilibrium constants of reversible reactions are results of laboratory experiments published in literature. Reactive surface areas of minerals are calculated. The model simulates the evolution of the chemical composition of groundwater whose age was derived from isotopic data. The results are compared to the chemical composition of groundwater along the trajectory of the prevailing flow. The model represents the interaction between groundwater and sandstones containing quartz, amorphous silica, a mixture of clay minerals, calcite and traces of residual feldspars. The three processes of waterrock interaction are the irreversible dissolution of feldspars and carbonate, aluminium and silica equilibrium. The composition of groundwater in the Cenomanian aquifer with a confined water table is a result of geochemical evolution during the last 26,000 years, while the groundwater in the Turonian aquifer with a free water table is a mixture of old groundwater and recent water infiltrated from the surface. The proposed models are applicable to confined aquifers with residual rock matrix derived from granitic rocks decomposed by weathering without mixing of waters of different ages.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hydrogeology & Hydrologic Engineering

ISSN

2325-9647

e-ISSN

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Svazek periodika

6

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

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EID výsledku v databázi Scopus

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