Geophysical Survey as a Tool to Reveal Subsurface Stratification at within a Small Agricultural Headwater Catchment: a Case Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00352374" target="_blank" >RIV/68407700:21110/21:00352374 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/CEJ.2021.03.0059" target="_blank" >https://doi.org/10.14311/CEJ.2021.03.0059</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/CEJ.2021.03.0059" target="_blank" >10.14311/CEJ.2021.03.0059</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Geophysical Survey as a Tool to Reveal Subsurface Stratification at within a Small Agricultural Headwater Catchment: a Case Study

Popis výsledku v původním jazyce

Managers use the catchment as a basic spatial unit in landscape hydrology to estimate local water balance and manage water resources. The catchment drainage area is commonly delineated based on the surface topography, which is determined using a digital elevation model. Therefore, the surface outflow only is implicitly considered. However, a substantial portion of the rainfall water infiltrates and percolates through the soil profile towards the groundwater, where geological structures control the drainage area instead of the soil surface topography. The discrepancy between the surface topography-based and bedrock-based drainage area can cause larger discrepancies in water balance calculations. It this paper, we present the investigation of the subsurface media stratification within the headwater catchment, located in the central part of the Czech Republic using a geophysical survey method - electrical resistivity tomography (ERT). Results indicate that the complexity of the subsurface geological layers cannot be estimated solely from the land surface topography. Although the shallow layers follow the shape of the surface, the deeper layers do not. This finding has a strong implication on the water flow regime since it suggests that the deep drainage may follow different pathways and other preferential directions as compared to the water flow within the shallow subsurface.

Název v anglickém jazyce

Geophysical Survey as a Tool to Reveal Subsurface Stratification at within a Small Agricultural Headwater Catchment: a Case Study

Popis výsledku anglicky

Managers use the catchment as a basic spatial unit in landscape hydrology to estimate local water balance and manage water resources. The catchment drainage area is commonly delineated based on the surface topography, which is determined using a digital elevation model. Therefore, the surface outflow only is implicitly considered. However, a substantial portion of the rainfall water infiltrates and percolates through the soil profile towards the groundwater, where geological structures control the drainage area instead of the soil surface topography. The discrepancy between the surface topography-based and bedrock-based drainage area can cause larger discrepancies in water balance calculations. It this paper, we present the investigation of the subsurface media stratification within the headwater catchment, located in the central part of the Czech Republic using a geophysical survey method - electrical resistivity tomography (ERT). Results indicate that the complexity of the subsurface geological layers cannot be estimated solely from the land surface topography. Although the shallow layers follow the shape of the surface, the deeper layers do not. This finding has a strong implication on the water flow regime since it suggests that the deep drainage may follow different pathways and other preferential directions as compared to the water flow within the shallow subsurface.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

10503 - Water resources

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

The Civil Engineering Journal

ISSN

1210-4027

e-ISSN

1805-2576

Svazek periodika

30

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

13

Strana od-do

766-778

Kód UT WoS článku

000711780900006

EID výsledku v databázi Scopus

—