Inverse Hydraulic And Transport Model of Groundwater Recovery Experiment Using Mixed-dimensional Concept

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24220%2F21%3A00008888" target="_blank" >RIV/46747885:24220/21:00008888 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41330/21:88586

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1365160921001209" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1365160921001209</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijrmms.2021.104734" target="_blank" >10.1016/j.ijrmms.2021.104734</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Inverse Hydraulic And Transport Model of Groundwater Recovery Experiment Using Mixed-dimensional Concept

Popis výsledku v původním jazyce

Understanding evolution of groundwater hydraulic and chemical conditions is important for safety assessment of radioactive waste disposal. Perturbations to groundwater can occur due to the construction and operation of the underground facility. The initial perturbations and their recovery after the tunnel closure were observed in the Groundwater REcovery Experiment in Tunnel (GREET) in Mizunami, Japan, at 500-m depth in granite. In a 100-m-long tunnel, 50 m was isolated by building a plug. Aside from other measurement and exploration data, groundwater pressures and chemical composition were monitored in boreholes with 24 packer sections. This work used numerical modelling to better understand and be able to predict the observed water flow and solute transport phenomena. The model covered 100-m scale around the tunnel and was divided into a continuum far-field domain and a near-field domain with deterministic discrete fractures and matrix blocks. A mixed-hybrid finite element solution was used with independent degrees of freedom for 3D and 2D elements. Modelling started with a blind prediction followed by a calibration (inverse model) for drainage and flooding experiment phases. The inverse hydraulic model fitted the more/less communicating sections and estimated transmissivity and conductivity parameters that are consistent for the two phases. The model sensitivity on transport parameters was insufficient for the inverse model, which can use only simplified measured evolution to avoid noisy data.

Název v anglickém jazyce

Inverse Hydraulic And Transport Model of Groundwater Recovery Experiment Using Mixed-dimensional Concept

Popis výsledku anglicky

Understanding evolution of groundwater hydraulic and chemical conditions is important for safety assessment of radioactive waste disposal. Perturbations to groundwater can occur due to the construction and operation of the underground facility. The initial perturbations and their recovery after the tunnel closure were observed in the Groundwater REcovery Experiment in Tunnel (GREET) in Mizunami, Japan, at 500-m depth in granite. In a 100-m-long tunnel, 50 m was isolated by building a plug. Aside from other measurement and exploration data, groundwater pressures and chemical composition were monitored in boreholes with 24 packer sections. This work used numerical modelling to better understand and be able to predict the observed water flow and solute transport phenomena. The model covered 100-m scale around the tunnel and was divided into a continuum far-field domain and a near-field domain with deterministic discrete fractures and matrix blocks. A mixed-hybrid finite element solution was used with independent degrees of freedom for 3D and 2D elements. Modelling started with a blind prediction followed by a calibration (inverse model) for drainage and flooding experiment phases. The inverse hydraulic model fitted the more/less communicating sections and estimated transmissivity and conductivity parameters that are consistent for the two phases. The model sensitivity on transport parameters was insufficient for the inverse model, which can use only simplified measured evolution to avoid noisy data.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

International Journal of Rock Mechanics and Mining Sciences

ISSN

1365-1609

e-ISSN

—

Svazek periodika

144

Číslo periodika v rámci svazku

AUG

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000675895200004

EID výsledku v databázi Scopus

2-s2.0-85107152479