Figure - available from: Natural Hazards and Earth System Sciences
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Empirical thresholds obtained from the calibration procedure. Panel (a) Lisbon area and panel (b) the north of Lisbon region. In the bottom right the equation of the regression curve with the average parameters is reported.
Source publication
Landslides are complex phenomena that cause important impacts in vulnerable areas, including the destruction of infrastructure, environmental damage, and loss of life. The occurrence of landslide events is often triggered by rainfall episodes, single and intense ones or multiple ones occurring in sequence, i.e., clustered in time. Landslide predict...
Citations
... As a result of climate change consequences, not only are the frequency and magnitude of similar or dissimilar types of hydrological extremes (e.g., floods and droughts) increasing in some regions, but the transitions between these events are also becoming more frequent and abrupt, accelerating economic and societal impacts (Chen and Wang, 2022;Bai et al., 2023;Xi et al., 2023;Banfi et al., 2024;Bowers et al., 2024). Based on observations spanning more than seven decades , Sudha et al. developed a statistical framework to define meteorological extremes-wet (i.e., abundance of water) and dry (i.e., lack of water) events-and investigated the transitions between them using a case study of the Meuse River basin in the Netherlands. ...
... S. Hencher (2006) and S. R. Hencher et al. (2011) describe how infiltrating water can expand joints in weathered rock, increasing the risk of translational movement in unstable areas. As the water pressure within these joints varies across storms, groundwater can generate pressure surges through sheeting joints, a process documented by Richards & Cowland (1986), as well as Banfi et al. (2024), who explain that water surges may lead to delayed mass movement, sometimes occurring even after precipitation has ceased. This phenomenon of irregular pressure dissipation aligns with the conditions observed in Sarwodadi Village, where mass sliding was induced despite the lack of significant rainfall ( Figure 15). ...
Banjarnegara is known as a regency highly susceptible to landslides, with over half of its territory classified as having a high to very high level of landslide hazard. Mass movements in Banjarnegara, particularly within the Merawu Sub-watershed, are predominantly categorized as slides. Rainfall stands out as the primary triggering factor for landslides in this region. This study aims to dissect the causes and mechanisms behind a unique landslide event that occurred in Sarwodadi Village, Pejawaran Sub-regency, Pejawaran Regency, Central Java Province, on July 6, 2022, around 10:30 PM. Unlike typical occurrences, this landslide was not propelled by precipitation, which is commonly the principal catalyst for landslides in Banjarnegara. Employing a three-stage methodology involving secondary data collection, field observation, and data analysis, we have identified two potential explanations for the landslide event: the loss of support from the stress barrier and mass sliding. Given that the area remains an active mining site with inherent dynamics, proactive measures are imperative to mitigate the risk of future landslides. This is essential for safeguarding the safety of local mining activities, which constitute the primary source of income for many households in Sarwodadi and its environment. A comprehensive mapping and assessment initiative targeting areas with geological characteristics akin to those in Sarwodadi should be undertaken across Banjarnegara. Such endeavors would not only diminish the occurrence of landslides but also enhance public awareness concerning atypical landslide occurrences.
