Cave airflow mechanism of a crevice-type cave: A case study from Czechia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F20%3AA21024XP" target="_blank" >RIV/61988987:17310/20:A21024XP - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27350/20:10245013

Výsledek na webu

<a href="https://scholarcommons.usf.edu/ijs/" target="_blank" >https://scholarcommons.usf.edu/ijs/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5038/1827-806X.49.1.2285" target="_blank" >10.5038/1827-806X.49.1.2285</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cave airflow mechanism of a crevice-type cave: A case study from Czechia

Popis výsledku v původním jazyce

At present, crevice-type caves are investigated mainly by means of geomorphic and geophysical methods. Microclimatic research of this type of caves is underrepresented and is often limited to temperature and humidity measurement only. Yet, microclimatic research of such caves can significantly help in the management and conservation of caves, speleological exploration or analysis of speleothems. Being the first ever research of ventilation within a crevice-type cave, a complex analysis of cave ventilation was performed within the Velká Ondrášova Cave, a crevice-type cave in the Outer Western Carpathians, Czechia. Longterm temperature recording, airflow tracing within the cave, and a total of nine monitoring field sessions (conducted between February and April 2015, in August 2015, and March 2018) provided data on temperature and airflow inside and outside the cave, serving as a basis for an analysis of ventilation rates, airflow routes within the cave, instability of the cave airflow, and the general ventilation mechanism of the cave. Based on the data, the average cave airflow velocity 0.27–0.61 m∙s−1 corresponding to the ventilation rates 540–1,260 m3∙h−1 (~13,000–30,000 m3/day) was estimated as a rough value of the ventilation, given the complex morphology of the cave. The Helmholtz resonator appeared to be an unsuitable model for an explanation of the instability within the cave airflow velocity. A regression analysis of the cave airflow highlighted the temperature gradient as an important predictor explaining almost 80% of the analyzed cave airflow variability. However, statistical testing suggested the outdoor wind to be also a relevant driving force of the cave ventilation, accounting for the active cave airflow regime during summer.

Název v anglickém jazyce

Cave airflow mechanism of a crevice-type cave: A case study from Czechia

Popis výsledku anglicky

At present, crevice-type caves are investigated mainly by means of geomorphic and geophysical methods. Microclimatic research of this type of caves is underrepresented and is often limited to temperature and humidity measurement only. Yet, microclimatic research of such caves can significantly help in the management and conservation of caves, speleological exploration or analysis of speleothems. Being the first ever research of ventilation within a crevice-type cave, a complex analysis of cave ventilation was performed within the Velká Ondrášova Cave, a crevice-type cave in the Outer Western Carpathians, Czechia. Longterm temperature recording, airflow tracing within the cave, and a total of nine monitoring field sessions (conducted between February and April 2015, in August 2015, and March 2018) provided data on temperature and airflow inside and outside the cave, serving as a basis for an analysis of ventilation rates, airflow routes within the cave, instability of the cave airflow, and the general ventilation mechanism of the cave. Based on the data, the average cave airflow velocity 0.27–0.61 m∙s−1 corresponding to the ventilation rates 540–1,260 m3∙h−1 (~13,000–30,000 m3/day) was estimated as a rough value of the ventilation, given the complex morphology of the cave. The Helmholtz resonator appeared to be an unsuitable model for an explanation of the instability within the cave airflow velocity. A regression analysis of the cave airflow highlighted the temperature gradient as an important predictor explaining almost 80% of the analyzed cave airflow variability. However, statistical testing suggested the outdoor wind to be also a relevant driving force of the cave ventilation, accounting for the active cave airflow regime during summer.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

International Journal of Speleology

ISSN

0392-6672

e-ISSN

—

Svazek periodika

49

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

55-67

Kód UT WoS článku

000527402000006

EID výsledku v databázi Scopus

—