Influence of DEM spatial resolution on the susceptibility mapping with SHALSTAB in the Rio Garcia hydrographic basin, municipality of Blumenau/SC / Influência de la resolución espacial del MDE en la cartografía de susceptibilidad con SHALSTAB en la cuenca hidrográfica del Río García, municipio de Blumenau/SC
| Autor: | Gisele Marilha Pereira Reginatto, Regiane Mara Sbroglia, Camilo Andrade Carreño, Bianca Rodrigues Schvartz, Pâmela Betiatto, Rafael Augusto dos Reis Higashi |
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| Jazyk: | portugalština |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Brazilian Applied Science Review; Vol. 5 No. 3 (2021); 1475-1491 Brazilian Applied Science Review; v. 5 n. 3 (2021); 1475-1491 Brazilian Applied Science Review Brazilian Journals Publicações de Periódicos e Editora Ltda instacron:FIEP |
| ISSN: | 2595-3621 |
| DOI: | 10.34115/basr.v5i3 |
| Popis: | In translational landslide susceptibility analysis with SHALSTAB (Shallow Landsliding Stability Model), the resolution of the digital elevation model (DSM) is determinant for defining the type of mapping generated (preliminary or not). In this study, in order to verify the influence of the SDM scale on the SHALSTAB stability classes, susceptibility maps were prepared at two scales: 1:50,000 and 1:10,000. The study area was the Garcia River watershed, belonging to the municipality of Blumenau, Santa Catarina, affected by landslides in the 2008 catastrophe, which enabled the validation of the simulations with the scars mapped in the field. Thus, the influence of scale on the distribution of the model's stability classes and on its performance was verified. SHALSTAB performed better at the 1:10,000 scale, predicting 70% of the instabilities in a percentage of unstable area approximately three times smaller than at the 1,50,000 scale. |
| Databáze: | OpenAIRE |
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