龙门石窟游客数量与二氧化碳浓度动态变化规律研究

开展对龙门石窟潜溪寺窟内CO2浓度和游客数量的长期监测,建立了洞窟CO2浓度自动监测系统,探究了CO2对石窟文物的侵蚀作用以及游客数量与CO2浓度的相关性;并提出了针对性防治措施。结果表明:CO2气体主要借助凝结水对石窟岩体进行侵蚀;潜溪寺内游客数量与CO2浓度变化呈正相关,游客高峰时段CO2浓度约为600×10-6(ppm),比正常水平偏高50%;游客稀少时段CO2浓度约为400×10-6(ppm)。一天内潜溪寺内由游客呼出CO2气体的增量达4 765.28 L,对石窟微气候环境影响严重。该研究成果可为定量研究CO2气体劣化碳酸盐岩机理提供实地参数依据,并且在如何对龙门石窟游客分流管理方面提供参考。

Study on Dynamics about Carbon Dioxide Concentration and Visitors in Longmen Grottoes

This paper carried out the long-term monitoring on CO2 concentration and the number of tourists in longmen grottoes temple grottoes, established automatic monitoring system about CO2, researched mechanism about CO2 corrosion as well as the correlation between visitors and CO2 concentration, then putting forward corresponding prevention measures. The results show that :CO2 erosion is mainly reacted by condensate water. Tourist numbers in Qianxi temple and CO2 concentration changes were positively correlated, CO2 concentration is about 600 ppm during tourists peak, which is 50% higher than normal and the influence is obvious. The research results can provid practical reference for quantitatively study the CO2 degradation on carbonate, and also provid the basis for management in longmen grottoes.