Preprints
https://doi.org/10.5194/nhess-2021-153
https://doi.org/10.5194/nhess-2021-153

  15 Jul 2021

15 Jul 2021

Review status: this preprint is currently under review for the journal NHESS.

Brief communication: Radar images for monitoring informal urban settlements in vulnerable zones in Lima, Peru

Luis Moya1,3, Fernando Garcia2, Carlos Gonzales1, Miguel Diaz1, Carlos Zavala1, Miguel Estrada1, Fumio Yamazaki4, Shunichi Koshimura3, Erick Mas3, and Bruno Adriano5 Luis Moya et al.
  • 1Japan-Peru Center for Earthquake Engineering Research and Disaster Mitigation, National University of Engineering, Tupac Amaru Avenue 1150, Lima 25, Peru
  • 2Graduate School of Civil Engineering, National University of Engineering, Av. Túpac Amaru 280, Lima 25, Peru
  • 3International Research Institute of Disaster Science, Tohoku University, Aoba 468-1, Aramaki, Aoba-ku, Sendai 980-8572, Japan
  • 4National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Ibaraki 305-0006, Japan
  • 5Geoinformatics Unit, RIKEN Center for Advance Intelligence Project, Japan

Abstract. Lima city, Peru's capital, has about 9.6 million inhabitants and keeps attracting more residents searching for a better life. Many citizens, without access to housing subsidies, live in informal housing and shack settlements. A typical social phenomenon in Lima is the sudden illegal occupation of areas for urban settlements. When such areas are unsafe against natural hazards, it is important to relocate such a population to avoid significant future losses. In this communication, we present an application of Sentinel-1 SAR images to map the extension of a recent occupation of an area with unfavorable soil conditions against earthquakes.

Luis Moya et al.

Status: open (until 26 Aug 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-153', Anonymous Referee #1, 19 Jul 2021 reply
    • RC2: 'Reply on RC1', Anonymous Referee #2, 25 Jul 2021 reply

Luis Moya et al.

Luis Moya et al.

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Short summary
Informal occupation of unused lands for settlements is a critical issue in Peru. In most cases, such areas are unsafe against natural hazards. We performed a time-series analysis of Sentinel-1 images at recent informal settlements in Lima city. The result suggests that a low-cost and sustainable monitoring system of informal settlements can be implemented.
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