scholarly journals DEM-Based Vs30 Map and Terrain Surface Classification in Nationwide Scale—A Case Study in Iran

2019 ◽  
Vol 8 (12) ◽  
pp. 537
Author(s):  
Sadra Karimzadeh ◽  
Bakhtiar Feizizadeh ◽  
Masashi Matsuoka

Different methods have been proposed to create seismic site condition maps. Ground-based methods are time-consuming in many places and require a lot of manual work. One method suggests topographic data as a proxy for seismic site condition of large areas. In this study, we mainly focused on the use of an ASTER 1c digital elevation model (DEM) to produce Vs30 maps throughout Iran using a GIS-based regression analysis of Vs30 measurements at 514 seismic stations. These maps were found to be comparable with those that were previously created from SRTM 30c data. The Vs30 results from ASTER 1c estimated the higher velocities better than those from SRTM 30c. In addition, a combination of ASTER 1c and SRTM 30c amplification maps can be useful for the detection of geological and geomorphological units. We also classified the terrain surface of six seismotectonic regions in Iran into 16 classes, considering three important criteria (slope, convexity and texture) to extract more information about the location and morphological characteristics of the stations. The results show that 98% of the stations are situated in six classes, 30% of which are in class 12, 27% in class 6, 17% in class 9, 16% in class 3, 4% in class 3and the rest of the stations are located in other classes.

2005 ◽  
Vol 9 (4) ◽  
pp. 363-373 ◽  
Author(s):  
Chandra Shekhar Dubey ◽  
Manoj Chaudhry ◽  
Braj Kishore Sharma ◽  
Arvind Chandra Pandey ◽  
Bhoop Singh

Measurement ◽  
2016 ◽  
Vol 91 ◽  
pp. 276-287 ◽  
Author(s):  
B. Kršák ◽  
P. Blišťan ◽  
A. Pauliková ◽  
P. Puškárová ◽  
Ľ. Kovanič ◽  
...  

Author(s):  
Michał Wasilewski ◽  
Jarosław Chormański

The Shuttle Radar Topography Mission Digital Elevation Model as an alternative data source for deriving hydrological characteristics in lowland catchment — Rogożynek catchment case study This paper describes possibility of supplementing digital topography data needed for hydrologic modeling (WetSpa model) of lowland catchment with existing, freely available DEM data obtained from Shuttle Radar Topography Mission launched on February 11th, 2000. Rogożynek basin (Upper Biebrza) as case study is given. Authors compared three DEMs: topographic — TOPO DEM 20 (20 m resolution), radar — SRTM DEM 90 (90 m res.) and resampled radar — SRTM DEM 20 (20 m res.). There were several characteristics compared and analyzed like: relative height differences, slopes, generated river network and generated subwatersheds (subbasins).


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