Proposition for a new classification of gully erosion using multifractal and lacunarity analysis: a complex of gullies in the Palmital stream watershed, Minas Gerais (Brazil) - Real, Ligia Sampaio Corte; Crestana, Silvio; Ferreira, Rogério Resende Martins; Sígolo, Joel Barbujiani; Rodrigues, Valéria Guimarães Silvestre (CATENA, 2020)