Scale Dependence of Waviness and Unevenness of Natural Rock Joints through Fractal Analysis

Figure 2

Illustration of the triangular prism surface area method (after Clarke [35]). is the grid size, ₁, ₂, ₃, and ₄ represent the areas of four triangles; , , and (, ) are, respectively, the coordinates of the four points of the triangular prism, denotes the elevation at the center of the grid cell, and , , , and are the elevations of the four points, respectively.