Heidarzadeh, M. and Heller, V. and Zhao, T. and Goff, C. (2024) Lessons for dam safety in the UK from the landslide-generated waves incident in the Apporo dam reservoir, Japan. In: British Dam Society Conference 2024, 11-14 September 2024, Keele, UK.
Full text not available from this repository.Abstract
We report and analyse the damage caused by landslide-generated waves in the Apporo reservoir (Japan) and take lessons for dam safety in the UK. The incident occurred in September 2018 following an M6.6 earthquake and typhoon Jebi. Apporo dam is a trapezoidal Cemented Sand and Gravel dam with a height of 47.2m. The simultaneous occurrence of the earthquake and the typhoon triggered thousands of landslides. Through field surveys, we identified several landslides on the banks of the reservoir at a close distance to the dam, causing a runup height of 5.3m at the shore. Visible damage, confirmed by site engineers, indicated that the waves damaged the reservoir bank revetments. Here, we model the landslide using Plaxis 3D, replicate the landslide-generated waves applying empirical equations, and discuss the lessons for dam safety in the UK. Using GIS data on elevation, rainfall, and seismicity, we identified the UK regions most susceptible to landslides. Region 3, the highest risk area, contains 252 large reservoirs, indicating the need to include landslide-generated wave risks in assessments of potential failure modes. We discuss prediction capabilities that can be applied for hazard and risk assessment of UK reservoirs regarding landslide-generated waves and propose a four-step methodology for such assessments.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Floods > Dams and reservoirs Water > General |
| Divisions: | Floods Water |
| Depositing User: | Helen Stevenson |
| Date Deposited: | 06 Sep 2024 13:21 |
| Last Modified: | 06 Sep 2024 13:41 |
| URI: | http://eprints.hrwallingford.com/id/eprint/1642 |
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