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Impact of Mesh and DEM Resolutions in SEM Simulation of 3D Seismic Response

2017; Seismological Society of America; Volume: 107; Issue: 5 Linguagem: Inglês

10.1785/0120160213

1943-3573

Saad Khan, M. van der Meijde, H.M.A. van der Werff, Muhammad Shafique,

High-pressure geophysics and materials

Research Article| September 25, 2017 Impact of Mesh and DEM Resolutions in SEM Simulation of 3D Seismic Response Saad Khan; Saad Khan aFaculty of Geo‐Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, s.khan@utwente.nlm.vandermeijde@utwente.nlcAlso at Department of Geology, Bacha Khan University Charsadda, P.O. Box 20, Charsadda, Khyber Pakhtunkhwa, Pakistan. Search for other works by this author on: GSW Google Scholar Mark van der Meijde; Mark van der Meijde aFaculty of Geo‐Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, s.khan@utwente.nlm.vandermeijde@utwente.nl Search for other works by this author on: GSW Google Scholar Harald van der Werff; Harald van der Werff aFaculty of Geo‐Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, s.khan@utwente.nlm.vandermeijde@utwente.nl Search for other works by this author on: GSW Google Scholar Muhammad Shafique Muhammad Shafique bNational Centre of Excellence in Geology (NCEG), University of Peshawar, 25120 Peshawar, Khyber Pakhtunkhwa, Pakistan Search for other works by this author on: GSW Google Scholar Author and Article Information Saad Khan aFaculty of Geo‐Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, s.khan@utwente.nlm.vandermeijde@utwente.nlcAlso at Department of Geology, Bacha Khan University Charsadda, P.O. Box 20, Charsadda, Khyber Pakhtunkhwa, Pakistan. Mark van der Meijde aFaculty of Geo‐Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, s.khan@utwente.nlm.vandermeijde@utwente.nl Harald van der Werff aFaculty of Geo‐Information Science and Earth Observation (ITC), University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands, s.khan@utwente.nlm.vandermeijde@utwente.nl Muhammad Shafique bNational Centre of Excellence in Geology (NCEG), University of Peshawar, 25120 Peshawar, Khyber Pakhtunkhwa, Pakistan Publisher: Seismological Society of America First Online: 27 Sep 2017 Online Issn: 1943-3573 Print Issn: 0037-1106 Bulletin of the Seismological Society of America (2017) 107 (5): 2151–2159. https://doi.org/10.1785/0120160213 Article history First Online: 27 Sep 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Saad Khan, Mark van der Meijde, Harald van der Werff, Muhammad Shafique; Impact of Mesh and DEM Resolutions in SEM Simulation of 3D Seismic Response. Bulletin of the Seismological Society of America 2017;; 107 (5): 2151–2159. doi: https://doi.org/10.1785/0120160213 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract This study shows that the resolution of a digital elevation model (DEM) and model mesh strongly influences 3D simulations of seismic response. Topographic heterogeneity scatters seismic waves and causes variation in seismic response (amplification and deamplification of seismic amplitudes) at the Earth's surface. DEM resolution influences the accuracy and detail with which the Earth's surface can be represented and hence affects seismic simulation studies. Apart from the spatial resolution of a DEM, the mesh resolution, adopted in the creation of a 3D spectral element meshing, also changes the detailedness of surface topography. Working with high‐resolution data is in most cases not possible on a regional scale because of its costliness in terms of time, money, and computation. In this study, we evaluate how low the resolution of DEM and mesh can become before the results are significantly affected. We simulated models with different combinations of DEM and mesh resolutions. The peak ground displacement (PGD) obtained from these simulations was compared with the PGD of the model with the finest mesh and DEM resolution. Our results show that any mesh or DEM resolution of 540 m or coarser will give unrealistic results. These results are valid for similar terrains as studied here and might not be directly applicable to regions with significantly different topography. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.