en:risk_knowledge
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
en:risk_knowledge [2023/02/09 16:10] – t-breuninger | en:risk_knowledge [2023/02/23 10:04] (current) – m-gamperl | ||
---|---|---|---|
Line 1: | Line 1: | ||
===== Risk Knowledge ===== | ===== Risk Knowledge ===== | ||
- | The risk assessment | + | The risk assessment |
- | The following steps were taken to assess the probability and size of potential landslides and, therefore, the risk in all parts of the study area. | + | |
+ | In our pilot project | ||
+ | The following steps were taken to assess the probability and size of potential landslides and, therefore, the hazard | ||
==== Mapping of Past Events ==== | ==== Mapping of Past Events ==== | ||
Line 11: | Line 13: | ||
All mapped events were plotted with size against age and divided into three groups representing the three scenarios. A landslide representing the 300 year event or residual hazard was not mapped. Therefore, its dimensions can only be presumed. | All mapped events were plotted with size against age and divided into three groups representing the three scenarios. A landslide representing the 300 year event or residual hazard was not mapped. Therefore, its dimensions can only be presumed. | ||
{{graph_szenarien.jpg}} | {{graph_szenarien.jpg}} | ||
- | |||
**30 year event:**\\ | **30 year event:**\\ | ||
- area of up to 4000 m²\\ | - area of up to 4000 m²\\ | ||
Line 28: | Line 29: | ||
==== Modelling of Selected Events ==== | ==== Modelling of Selected Events ==== | ||
+ | Several of the events mapped in August 2019 (landslide map) were used for backmodelling. Different parameters influencing the behavior and shape of a landslide (depth and shape of the sliding surface, sliding angle etc.) were changed throughout the modelling process. This allowed for the determination of the most probable ranges of values of these parameters, that could have shaped the modelled landslide. | ||
+ | The parameters and values determined by the backmodelling were then used to model possible future landslides in Bello Oriente, including the possible runout of those events. | ||
- | + | ==== Hazard | |
- | ==== Risk Map ==== | + | The results from the modelling in combination with the slope angle and the geology were visualized in a hazard map. The 30 year event hazard zone and the 100 year event hazard zone are depicted in the same color (red), since both are defined as high hazard. The residual hazard is depicted in yellow.\\ |
+ | Most steep areas above the inhabited zone down to the uppermost road of Bello Oriente are in the high hazard/high risk zone. The runout of a possible event could even reach the main road of the barrio.\\ | ||
+ | {{layout_hazardsynthesis_pm.jpg}} |
en/risk_knowledge.1675959037.txt.gz · Last modified: 2023/02/09 16:10 by t-breuninger