Review of factors affecting formation of cracks in clay layers

Image analysis is the principal way to measure characteristics of cracked soil. Recent technological advances permit trough the quantification of pixels in binary image determine the quantity of pixels that corresponds to cracking and non-cracking zones (Trabelsi et al., 2011; Tang et al., 2008; Vogel et al., 2005; Yesiller et al., 2000; Serra 1982). Furthermore, fractal dimension allow to characterize the degree of cracking and the interconnectivity of cracks (Vallejo 2009).