Physical Modelling of Dam Overtopping from Landslide Generated Waves
| dc.contributor.advisor | Kemal, Jabir (PhD) | |
| dc.contributor.author | Netsanet, Nigatu | |
| dc.date.accessioned | 2021-03-30T09:13:55Z | |
| dc.date.accessioned | 2023-11-11T08:32:31Z | |
| dc.date.available | 2021-03-30T09:13:55Z | |
| dc.date.available | 2023-11-11T08:32:31Z | |
| dc.date.issued | 2020-12 | |
| dc.description.abstract | Landslide generated waves may have disastrous impact on the surrounding environment. The catastrophic event such as Vajont disaster occurred in Italy, 1963 and caused the loss of more than 2000 human lives, is among the reasons that landslide generated wave and consequences is of great deal. This study is based on a physical model test in laboratory of Hydraulic Engineering at NTNU which simulates a landslide released, fall into reservoir, propagates and overtops a dam. This thesis is a parametrical study on landslide generated impulse waves based on experiments conducted in a laboratory on a 1: 190 scale model. The model has three major parts: the slide, the reservoir and the dam. The slides are simulated with rigid blocks sliding over the slide ramp, falling into reservoir, generating wave, runs up and overtops a dam. All the parameters are measured with different sensors installed. To investigate the parameters which define the wave generation and overtopping of a dam due to slide generated waves, a systematic variation of parameters like slide volume, slide release height, still water depth and upstream dam slope, were applied. Based on the results from this study, the slide volume is found to be the most dominant parameter that defines the overtopping volume due to impulse waves. In addition, freeboard is found to be another parameter that has significant impact on overtopping volume. For a fixed setup, an increase in freeboard decreases the overtopping volume. The other parameter investigated is the slide impact velocity, where results show that the slide release height is the most dominant factor to define it. The most important part of the study is that the overtopping volume and the overtopping depth is not uniform along the five dam crest sections, where the maximum is recorded with the ultrasonic sensors installed at the edges namely, CH11 and CH16. Finally, it is observed that it is difficult to apply the results from the literature to this study due to the different model setup used in this study. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/25786 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Impulse waves | en_US |
| dc.subject | Landslide | en_US |
| dc.subject | wave generation | en_US |
| dc.subject | wave propagation | en_US |
| dc.subject | overtopping | en_US |
| dc.subject | Impulse product parameter | en_US |
| dc.title | Physical Modelling of Dam Overtopping from Landslide Generated Waves | en_US |
| dc.type | Thesis | en_US |