Dominican Republic Disasters

Average GPM IMERG data (2018) combined with landslide susceptibility calculated using SRTM imagery (2000) serve as inputs for the Landslide Hazard Assessment for Situational Awareness (LHASA) model for the Dominican Republic Cordillera Central mountain range. This LHASA “nowcast” respectively shows high and moderate landslide potential in red and yellow, as well as high to low susceptibility to rainfall-triggered landslides in dark and light orange. With LHASA nowcasts, landslide hazard can be assessed in near real-time.

Mapping Landslide Susceptibility and Exposure in the Dominican Republic Using NASA Earth Observations

Rainfall-triggered landslides associated with tropical storms cause devastating damage to the communities in the Dominican Republic and surrounding Caribbean islands. With the predicted increase in the frequency and intensity of storms, the region would benefit from reliable disaster monitoring. Partnering with Servicio Geológico Nacional (SGN) and Oficina Nacional de Meteorología (ONAMET), the team created local landslide susceptibility maps and used them in combination with NASA Earth observations as inputs to the Landslide Hazard Assessment for Situational Awareness (LHASA) model to visualize potential landslide activity in near real-time. Susceptibility maps were based on slope derived from elevation data from the Shuttle Radar Topography Mission (SRTM), geology, road networks, fault lines, and forest loss. In LHASA, each map was combined with near real-time rainfall data from the Global Precipitation Measurement (GPM) mission. Using model outputs, the team identified areas of moderate and high potential landslide activity in a northern region of interest identified by our partners. Additionally, exposure maps were generated using a bivariate method that combined susceptibility with population and critical infrastructure data. The team created a LHASA standard operating procedure document for the end users at SGN and ONAMET. The partners can use this to update the susceptibility maps as new data becomes available and run the LHASA model independently to monitor near real-time landslide potential.

Location
Virginia – Langley
Term
Summer 2019
Partner(s)
Servicio Geológico Nacional (Dominican Republic)
Oficina Nacional de Meteorología (Dominican Republic)
NASA Earth Observations
GPM IMERG
SRTM
Team
Sarah Aldama (Project Lead)
Chelsea Dandridge
Kyung “Robin” Kim
Gigi Pavur
Advisor(s)
Dr. Dalia Kirschbaum (NASA Goddard Space Flight Center)
Dr. Kenton Ross (NASA Langley Research Center)