| Issue |
E3S Web Conf.
Volume 195, 2020
4th European Conference on Unsaturated Soils (E-UNSAT 2020)
|
|
|---|---|---|
| Article Number | 03010 | |
| Number of page(s) | 4 | |
| Section | Experimental Evidence and Techniques | |
| DOI | https://doi.org/10.1051/e3sconf/202019503010 | |
| Published online | 16 October 2020 | |
Image-based measurements of degree of saturation
1 Centre de Metodes Numerics en Enginyeria (CIMNE), Barcelona, Spain
2 Department of Civil and Environmental Engineering. Universitat Politècnica de Catalunya (UPC), Barcelona, Spain
* Corresponding author: ferran.parera@upc.edu
A method based on SWIR images is proposed for measuring the degree of saturation in soils. This method is especially suitable for use in experiments conducted in the facilities of a common geotechnical laboratory. The method uses images on the short-wave infrared (SWIR) (wavelength: 1400– 1550 nm), which is highly absorbed by water compared with the other bands of the light spectrum (visible and near-infrared). The paper presents the basis of the method and the procedure to measure the degree of saturation in a massive and non-invasive way. A relation curve to transform the pixel intensity values to the degree of saturation is provided for samples of a beach sand. The non-linearity of this curve is discussed and related to the optical path length.
© The Authors, published by EDP Sciences 2020
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