Spectral Reflectance Characteristics of Laboratory-Grown Salt Crusts on Silty Clay and Sandy Soils Academic Article uri icon


  • Copyright Taylor & Francis Group, LLC. Salinization of soils has led to the loss of cropland and represents a major threat to food production. Hyperspectral imaging may prove to be useful for characterizing the spectral behavior of salt-affected soils but the methodology needs to be better evaluated. In this study, we characterized the spectral behaviors of four types of chloride salt crusts [calcium chloride dehydrate, magnesium chloride dehydrate, potassium chloride, and sodium chloride (CaCl22H2O, KCl, and NaCl)] formed in the laboratory. We found that (1) as salt concentration increased, the reflectance intensity decreased for both soil types, and the decreases were especially pronounced for the soils leached with the CaCl22H2O and MgCl22H2O solutions; (2) soil texture had little if any effect on reflectance; and (3) reflectance intensity decreased in the order CaCl22H2O MgCl22H2O KCl NaCl. By clarifying the spectral behavior of chloride salt crusts on soils, our work demonstrates hyperspectral imaging may differentiate some types of salts and determine relative salt concentrations.

published proceedings


altmetric score

  • 2.5

author list (cited authors)

  • Medeiros Pessoa, L. G., Galvao Dos Santos Freire, M. B., Wilcox, B. P., Rossi, C. G., De Oliveira Souza, A. M., & Galvincio, J. D.

citation count

  • 2

complete list of authors

  • Medeiros Pessoa, Luiz Guilherme||Galvao Dos Santos Freire, Maria Betania||Wilcox, Bradford Paul||Rossi, Collen Green||De Oliveira Souza, Anderson Mailson||Galvincio, Josicleda Domiciano

publication date

  • August 2015