Quantitative description theory of water migration in rock sites based on infrared radiation temperature

In order to solve the problem of quantitative description of water migration in a stone artifacts site, we have investigated the dynamic migration process of water and established a quantitative descriptive theory system based on infrared radiation temperature through the infrared thermal imaging method. We propose the criterion of water movement initiation based on entropy theory. A quantitative relationship equation between infrared radiation temperature and water content is established using the first law of thermodynamics. A method of identifying the moisture migration wetting front is proposed. The above theory is verified by laboratory experimental thermal imaging results of moisture migration of siltstone from the Mogao Grottoes cliff. Therefore, our method can quantitatively describe the start and migration of water at a rock site using our theoretical system and infrared thermography in a non-destructive and real-time manner. Here, we provide a new method for quantitative description of moisture migration in a stone artifacts site.