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Item type:Publication, 2017 Coastal El Niño in Peru: an opportunity to analyze the influence of hazard mitigation plans on local resilience(Elsevier, 2021-01-01)This research proposes an ex post methodology for analyzing the influence of Hazard Mitigation Plans in the level of resilience in localities affected by an extreme event. For verifying its applicability, the case of heavy rainfalls of the 2017 coastal El Niño event in Peru is analyzed. The methodology consists of two analysis levels. The first one correlates the quality of existing plans with damages and recovery rapidity. The second analysis level focuses on one sample of the localities selected for performing a deeper qualitative-territorial analysis. The methodology applicability was verified, and we determined that the reduction of direct damages after an event is correlated to the existence of actions such as land use regulation and the structural reinforcement. Moreover, the identification of those responsible for these processes, the verification of possible financing funds and the estimation of intervention costs positively influence on the reconstruction rapidity. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Semi-Supervised Segmentation for Mapping Urban Expansion and Hazard Exposure in Lima, Peru(2026-01-22)Abstract. Urban expansion in rapidly growing cities increases exposure to natural hazards but remains difficult to monitor in regions with limited data. This challenge is amplified in places such as Metropolitan Lima, where global datasets of urban areas lack precision along complex and rapidly changing city boundaries. As a result, recent growth in informal and peripheral zones is not well defined. This study introduces a practical application of a semi-supervised mapping approach that combines satellite imagery with partially labeled information and targeted manual refinement to identify new built-up areas in Metropolitan Lima from 2016 to 2025. The method improves the detection of small and fragmented structures, including emerging informal settlements that global datasets frequently miss. Results show that Metropolitan Lima expanded by approximately 76 km2 during the study period. A portion of this growth occurred in coastal zones exposed to tsunamis, in areas with medium to high landslide susceptibility, and on soil types where strong ground shaking is amplified during large earthquakes. These findings highlight the continued concentration of people and infrastructure in hazard-prone terrain.