JP

Organization

Research Division

Risk Evaluation and Disaster Mitigation Research Division
Computational Safety Engineering Lab
Assistant Professor
Ph.D.(Engineering)
Research Subject(s)
My research focuses on the computational modeling of rainfall-induced hazards, specifically landslides, floods, and debris flows. I am interested in combining geological, hydrologic, and geotechnical engineering concepts to develop numerical frameworks for multihazard disaster risk reduction.
Key Words
Computational Mechanics / Geomechanics / Hydrology
Website
Research Activities

Numerical modeling and simulation of debris flows
I work on developing numerical frameworks, specifically using smoothed particle hydrodynamics (SPH), to simulate the complex dynamics of landslides and debris flows. My work focuses on applying SPH to discretize the depth integrated shallow water equations to conduct efficient and practical regional-scale simulations. These simulations aim to provide computationally-derived runout estimates depicting flow depth, velocity, and depositional extent to improve hazard assessment for sediment-related disasters.

Multihazard assessment of rainfall-induced hazards
I develop catchment-scale multihazard assessment methods that unify the analysis of flooding and shallow landslides triggered by extreme rainfall. By integrating hydrological surface flow models, infiltration equations, and deterministic slope stability analyses, I can simulate the spatio-temporal response of multiple hazards simultaneously. I use these models to generate time-series hazard maps, validated against real-world events like Typhoon Hagibisa and Typhoon YunYeung, to enhance regional-scale  disaster risk reduction.

Selected Works

Dolojan, N. L. J., et al. (2025). Integrated multihazard study combining qualitative and quantitative analyses of floods, landslides, and debris flows. International Journal of Disaster Risk Reduction, 105647. https://doi.org/10.1016/j.ijdrr.2025.105647

Dolojan, N. L. J., et al. (2023). Hydrologic-geotechnical modelling of shallow landslide and flood hazards caused by heavy rainfall. Engineering Geology, 323, 107184. https://doi.org/10.1016/j.enggeo.2023.107184

Dolojan, N. L. J., et al. (2021). Mapping method of rainfall-induced landslide hazards by infiltration and slope stability analysis. Landslides, 18(6), 2039-2057. https://doi.org/10.1007/s10346-020-01617-x

 

Selected Memberships
  • The International Association of Computational Mechanics
  • Japan Society for Computational Engineering and Science
  • Japanese Geotechnical Society
  • Geological Society of the Philippines
Selected Awards
  • Japanese Government (MEXT) Scholarship Award (Master's and PhD)