Akademik Veri Yönetim Sistemi
4th International Civil Engineering & Architecture Conference, Trabzon, Türkiye, 17 - 19 Mayıs 2025, cilt.1, sa.108, ss.761-769, (Tam Metin Bildiri)
Abstract: Rockfall is defined as the detachment of a rock block from the main rock mass due to physical or
biological weathering, followed by its downward movement through rolling, sliding, or bouncing along the slope.
Today, various methods are employed to assess rockfall hazards however, two dimensional (2D) and threedimensional
(3D) statistical simulations that model rockfall behavior are commonly preferred. In these analyses,
the morphology of the terrain surface plays a critical role. For this purpose, in the present study, a total of twelve
2D rockfall simulations were performed along four different cross sections extracted from three terrain models
prepared at scales of 1/1, 1/1000, and 1/5000. The parameters obtained from the analyses such as bounce height,
velocity, and kinetic energy were comparatively evaluated. The results demonstrate that as the resolution of the
terrain model increases, significant changes occur in both the bounce height of the rock block and the trajectory it
follows. In contrast, when the terrain model resolution decreases, the rock block tends to roll rather than bounce,
even on very steep slopes. These findings clearly indicate that the outcomes of rockfall analyses are directly
influenced by the accuracy of the terrain model, and that higher-resolution models provide more reliable and safer
solutions for engineering applications. The study highlights the importance of high precision terrain modeling in
accurately assessing rockfall risks and developing effective mitigation measures.