DOI:
AUTHOR(S)
Moshfiqur Robin, Sajib Sarker, Shajahan Alam, Shakawat Hossain
ABSTRACT
Landslides constitute a significant natural hazard in Bangladesh, particularly within the Chattogram metropolitan region, where uncontrolled urban expansion and complex topographical conditions exacerbate vulnerability. This study employs integrated geospatial analysis and network modeling techniques to optimize evacuation routes and emergency response pathways for landslide-affected areas within Chattogram City Corporation (CCC) boundaries, utilizing comprehensive landslide incident data spanning from 2014-2024. The best evacuation paths from high-risk areas to nearby medical facilities and the shortest emergency access routes from fire stations to disaster locations were identified by methodical mapping and spatial analysis of past landslide incidents. Network analysis revealed evacuation distances ranging from 0.563 to 8.849 km (mean: 2.73 km), while emergency access routes extended between 1.204 and 11.002 km (mean: 4.82 km). Critical findings identified Venom Hill as a priority intervention zone due to maximum evacuation and response distances. Bijoynagar, Hathazari, Cantonment, and 3 no Bazar emerged as high-frequency incident locations with prolonged emergency response times. The analysis further revealed service concentration around Bayazid Fire Station, indicating spatial inequality in emergency service coverage distribution. The findings highlight the necessity of strategically decentralizing emergency services and improving transportation infrastructure connectivity in high-risk areas. The methodology contributes to developing resilient emergency response systems and improving disaster risk reduction capacity in vulnerable urban environments.
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