Monitorización de las condiciones microambientales, hidrogeoquímicas y de conservación del sistema kárstico subterráneo de Ojo Guareña (Burgos)

  1. Ángel Fernández-Cortés 1
  2. Soledad Cuezva 1
  3. Elena García-Antón 1
  4. Miriam Álvarez- Gallego 1
  5. Beatriz Cabeza 2
  6. Consuelo Temiño 2
  7. José-María Calaforra 3
  8. Sergio Sánchez-Moral 1
  1. 1 Museo Nacional de Ciencias Naturales
    info

    Museo Nacional de Ciencias Naturales

    Madrid, España

    ROR https://ror.org/02v6zg374

  2. 2 Servicio Territorial de Medio Ambiente de Burgos
  3. 3 Universidad de Almería
    info

    Universidad de Almería

    Almería, España

    ROR https://ror.org/003d3xx08

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Book:
Iberoamérica subterránea: CUEVATUR 2014, I Congreso Iberoamericano y V Congreso Español sobre Cuevas Turísticas
  1. Calaforra Chordi, José María (coord.)
  2. Durán Valsero, Juan José (coord.)

Publisher: Asociación de Cuevas Turísticas Española ; Instituto Geológico y Minero de España

ISBN: 978-84-617-1908-2

Year of publication: 2014

Pages: 241-250

Congress: Congreso Español sobre Cuevas Turísticas (5. 2014. Aracena)

Type: Conference paper

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Abstract

As part of the project for adapting and tourist use of Ojo Guareña subterranean system (Burgos), in particular the northeast sector: Palomera, Dolencia, Cacique and Museo de Cera, an environmental monitoring program began in 2013 through a research collaboration between the National Museum of Natural Sciences (CSIC) and the Natural Heritage Foundation (regional government of Castilla y León). This research aims to determine the natural environmental dynamic of this subterranean karst system, as well as to establish the basic monitoring infrastructure to assess the environmental impact of visitors groups. The first results reveal the strong natural variations of the main control parameters of cave air: temperature, relative humidity and gas concentration (CO2 and radon). These variations affect to a wide proportion of the tourist route under environmental monitoring, both on a daily scale as seasonal, especially in those areas close with direct connection to the exterior (Sima Dolencias sinkhole and Palomera doline) and they are controlled by external weather conditions, mainly the temperature difference between cave air and the atmosphere. The CO2 contents of cave air are approximately near to the atmospheric background (400-450 ppm), however some significant daily oscillations have been registered, ranging from 680 to 1900 ppm/day on average. Daily oscillations of CO2 concentration of cave air disappear once exterior air temperature is clearly lower than cave air temperature and the air flow by advection favors the cave air renewal. The amplitude of circadian cycles of CO2 and other trace gases such as radon (222Rn) is reduced in the most remote galleries cave far from main entrances (Museo de Cera). In these areas, the variations in concentration of both gases are correlated with changes in barometric pressure, becoming areas of particular interest when assessing the environmental impact of visitors.

Data source: Dialnet