Figure 55- - uploaded by Dogan Perincek
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The mudflow (earthflow) occurred in March 2010 in the gardens located to the north of the Güleçler village. The earth and the trees have glided down towards the valley. (For location; see Figure 53).
Source publication
ABSTRACT
Purpose of this study is to locate the landslides that can threaten the settlement areas around the Çetin dam
reservoir is situated in vicinities of Pervari town of Siirt city. The Çetin Dam is going to be constructed in
Botan Çayı (Ulu Çay) valley. The Çetin dam crest, reservoir areas are all located on allochthonous units.
The Maden Comp...
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Hypsometry is widely used for inferring tectonic effects and erosion status of landscapes. Tectonics, structural inhomogeneity, lithologic differences, and climatic variations lead to topographic undulations discerned into discrepancies in the values. Hypsometric index (and curve), indicative of frequency distribution of proportional elevation with...
Citations
... Active tectonism, lithology, morphology, and climatic properties of the region increase the risk of landslides. Hence, in the case of a landslide due to an earthquake or sudden heavy precipitation in the dam reservoir, landslide-generated impulse waves can threaten the dam body and settlements near the reservoir area (Perinçek 2016). In addition, it is of great importance to determine the risks due to the cumulative effects of impulse waves that will occur because of the movement of multiple landslides together into the reservoir. ...
... After the dam construction was planned, studies on landslides in the region increased. In a detailed study by Perinçek (2016), many landslides were mapped along the reservoir area near the villages of Çukur, Ayvalıbağ, and Narsuyu. The cause of the landslides in the northeast of Çukur Village is the Maden Complex outcropping in the northwest of the village. ...
... . reason is the mudstone layers in the Maden Complex (Perinçek 2016). Because of factors such as the reservoir geometry and the distance to the dam body of landslides (more than 10 km), impulse waves generated from these landslides are thought to have very small effects in this region. ...
This study used 3D numerical simulations to model the potential risk of impulse waves originating from concurrent landslides in Çetin Dam reservoir in Southeast Turkey, which is near an active orogenic belt and related uplift system. A volume of fluid (VOF) model based on the Reynolds averaged Navier–Stokes equations was used to accurately simulate the free-surface/solid interaction, landslide deformation, and wave propagation. A renormalization group (RNG)-based k-ε turbulence model was used to create a fluid coupled model, and a drift-flux model was selected to simulate the potential landslide. A partially submerged landslide located 4900 m from the dam and another subaerial landslide located 800 m from dam were first modelled separately. 3D numerical models show that the impulse wave triggered by the subaerial landslide reaches 4 m in height at 34 seconds right in front of the dam, whereas the wave induced by the partially submerged landslide reaches 4.2 m in height at 205 seconds. After the effects of both landslides were modelled separately, the cumulative effect of impulse waves was evaluated in the case of the two landslides occurring simultaneously. As predicted, the highest wave reaching the dam body occurred 15 seconds later due to the interference of the two waves. However, contrary to expectations, the height of the new wave increased, which was probably due to the constructive interference of the original waves, and it reached 5.6 meters at the dam body. Numerical analysis shows that when more than one landslide occurs simultaneously in the reservoir, the resulting interference affects the wave properties considerably.
