التفاصيل البيبلوغرافية
| العنوان: |
A CASE STUDY OF ANTHROPOGENIC IMPACT ON THE CO2 LEVELS IN LOW-VOLUME PROFILE OF THE BALCARKA CAVE (MORAVIAN KARST, CZECH REPUBLIC). |
| Alternate Title: |
ŠTUDIJ VPLIVA OBISKOVALCEV NA KONCENTRACIJE CO2 V MANJŠIH IN SLABO POVEZANIH JAMSKIH PROSTORIH:PRIMER IZ JAME BALCARKA NA MORAVSKEM KRASU V REPUBLIKI ČEŠKI. (Slovenian) |
| المؤلفون: |
LANG, Marek, FAIMON, Jiří, EK, Camille |
| المصدر: |
Acta Carsologica; 2015, Vol. 44 Issue 1, p71-80, 10p |
| مصطلحات موضوعية: |
CAVES, CARBON dioxide, AIR flow, VENTILATION |
| مصطلحات جغرافية: |
MORAVIAN Karst (Czech Republic), CZECH Republic |
| Abstract (English): |
Anthropogenic impact on CO2 levels was studied in the lowvolume chamber connected with the low-profile corridor in Balcarka Cave, the show cave in Moravian Karst, during the period of limited ventilation. Modeling showed that the natural CO2 levels were controlled by the CO2 fluxes (up to ~ 3.14 × 10-2 mol s-1) from adjacent spaces. These fluxes changed with cave airflows and ventilation modes. Two main components of anthropogenic impact were recognized: (1) visitor breathing and (2) visitor movement. The CO2 input derived from individual visitor groups varied from 1.96 × 10-4 to 2.45 × 10-3 mol s-1, which was the significant part of the CO2 fluxes from adjacent spaces. The visitor movement induced the airflows up to 0.2 m3 s-1. They exceeded the natural airflows (up to 3.2 × 10-3 m3 s-1) by factor of more than 60. These airflows caused cave ventilation mode's switching and, significant drop of CO2 fluxes/levels due to changed ventilation. The study therefore indicates that various anthropogenic influences in show cave can balance and neutralize each other, in dependence on cave morphology and seasonal conditions. [ABSTRACT FROM AUTHOR] |
| Abstract (Slovenian): |
Raziskovali smo vpliv obiskovalcev na koncentracijo CO2 v jamski dvorani z majhno prostornino v turistični jami Balcarka na Moravskem krasu. Dvorana je z drugimi deli jame povezana z manjšim rovom, raziskave pa so potekale v času, ko je naravno prezračevanje majhno. Z modeliranjem smo pokazali, da so naravne vrednosti CO2 določene s tokom iz sosednjih prostorov. Te dosegajo vrednosti do ~ 3.14 × 10-2 mol s-1 in se spreminjajo z intenzivnostjo naravnega prezračevanja. Obiskovalci na koncentracijo CO2 vplivajo z dihanjem in gibanjem po jami. Tok CO2, ki ga prispevajo skupine obiskovalcev, znaša med 1,96 × 10-4 mol s-1 in 2,45 × 10-3 mol s-1, kar je primerljivo z naravnimu dotokom. Zračni tok zaradi gibanja obiskovalcev pa znaša do 0,2 m3 s-1, kar je 60 krat toliko, kot je tok naravne ventilacije v času meritev. Tako prisilno prezračevanjen na opazovanem mestu pomembno znižuje koncentracijo CO2. Obiskovalci torej na različne način vplivajo na koncentracijo CO2, pri čemer se ti vplivi lahko tudi izničijo. [ABSTRACT FROM AUTHOR] |
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