Inverse modeling of natural tracer transport in a granite massif with lumped-parameter and physically based models: case study of a tunnel in Czechia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F21%3A00008912" target="_blank" >RIV/46747885:24220/21:00008912 - isvavai.cz</a>

Alternative codes found

RIV/46747885:24620/21:00008912 RIV/60460709:41330/21:88585

Result on the web

<a href="http://link.springer.com/article/10.1007/s10040-021-02389-x" target="_blank" >http://link.springer.com/article/10.1007/s10040-021-02389-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10040-021-02389-x" target="_blank" >10.1007/s10040-021-02389-x</a>

Result language

angličtina

Original language name

Inverse modeling of natural tracer transport in a granite massif with lumped-parameter and physically based models: case study of a tunnel in Czechia

Original language description

This study deals with numerical modelling of hydraulic and transport phenomena in granite of the Bohemian massif in Bedrichov, Czechia (Czech Republic). Natural tracers represented by stable isotopes δ18O and δ2H were collected at the tunnel outflow points and nearby catchment and their concentrations were monitored for seven years. The study compared transport simulations by a two-dimensional (2D) physically based model (advection-dispersion) developed in Flow123d software and a simpler lumped-parameter model, calculated with FLOWPC. Both variants were calibrated with UCODE software, either fitting the concentration data alone, or including the tunnel inflow rates in the case of the 2D model calibration (either in separate steps or within a single optimization problem). Since each of the models describes the tracer transport with different parameters, the models were compared based on the mean transit time as a postprocessed quantity. Besides this, two different options for processing the recharge data (input for both models) were evaluated. Calibration and data interpretation were possible for three of the four observed places in the tunnel, thus determining the depth limit of applicability of the stable isotopes. The estimates for discharge sampling at 25–35 m depth based on inverse modelling provide reasonable values of mean transit time (20–40 months) for the lumped parameter models, little revising the results of previous studies at the site. The resulting transport parameters of the advection-dispersion model (porosity and dispersivity) are in accordance with the hydrogeological structures present at the sampling sites.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10500 - Earth and related environmental sciences

Project

<a href="/en/project/EF16_013%2F0001792" target="_blank" >EF16_013/0001792: RINGEN - Research Infrastructure Upgrade</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Name of the periodical

Hydrogeology Journal

ISSN

1431-2174

e-ISSN

—

Volume of the periodical

29

Issue of the periodical within the volume

8

Country of publishing house

DE - GERMANY

Number of pages

22

Pages from-to

2633–2654

UT code for WoS article

000691229500001

EID of the result in the Scopus database

2-s2.0-85113852534