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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. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Maritime Peoples of the Western Andes(Oxford University Press, 2026-05-21)Maritime adaptation on the Pacific coast of the Central Andes started as early as the peopling of this region during the terminal Pleistocene. Several archaeological sites between Ecuador and Chile show an early colonization of the western central Andes by well-adapted foraging groups. These initial coastal establishments led to more diversified settlement patterns, complex subsistence economies, and dynamic social interactions during the early Holocene. All the available archaeological evidence must be understood within the changing climatic and environmental context that characterized the western central Andes throughout this time. In particular, studying the nature of interactions between El Niño and maritime communities of the Central Andes is key to understanding the development of specialized economies, more permanent settlements, population growth, social resilience, and the development of social complexity.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Improving habitability in informal settlements in the Global South: Exploring the impact of community urban green infrastructure on outdoor heat stress(Elsevier Ltd, 2026-01-01)Over 1 billion people currently live in informal settlements, which have become the predominant form of urbanisation, especially in the Global South. They are characterised by dense housing with inadequate access to infrastructure and services. Due to fragmented efforts to create and maintain urban green spaces the possibility of improving outdoor thermal conditions is limited. This study investigates the impact of small community parks on outdoor heat stress in José Carlos Mariátegui, an informal hillside settlement in Lima, Peru. A mixed-methods approach was employed, combining ground-based fixed-point measurements and satellite-derived land surface temperature data. Air temperature, humidity, wind speed, and solar radiation were recorded using a weather station on a sun-exposed rooftop and a compact data logger in a nearby shaded park. Spot solar radiation measurements were taken using a portable pyranometer. Satellite thermal imagery from Landsat 8 was processed using QGIS to assess spatial thermal patterns. The Universal Thermal Climate Index was applied to evaluate heat stress under both sun-exposed and shaded conditions. Results showed that the small park reduced average air temperature by 0.5 °C, with peak cooling of 3 °C in the morning hours. However, afternoon warming was observed, likely due to local topography and tree canopy effects. Despite this, shaded areas significantly reduced heat stress exposure—from 60 % to less than 20 % of daytime hours. The study highlights the importance of low-cost, context-sensitive green infrastructure in mitigating heat stress in resource-scarce urban environments. It offers actionable planning insights, essential for protecting public health in marginalised, low-income communities in the Global South.Scopus© Citations 8 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Exploring the Impact of Community Urban Green Infrastructure on Outdoor Heat Stress in Informal Settlements in the Global South(RELX Group (Netherlands), 2025-01-01)1 - Some of the metrics are blocked by yourconsent settings
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