Verisk Inland Flood Model for Malaysia and Indonesia

Introducing the Verisk Inland Flood Model for Malaysia and Indonesia.

Scope

New model estimates losses from inland flooding (on- and off-floodplain) caused by tropical cyclone (TC) and non-TC precipitation across Malaysia and Indonesia.

General model updates

Model domain
  • Malaysia
  • Indonesia (including the Islands of Java, Sumatra, and Borneo)1
Peril(s)
  • Inland flood (on- and off-floodplain)
Model resolution
  • 30 m
Hazard
  • Precipitation is simulated using a statistical perturbation approach.
  • Hydrology model captures both large-scale and highly-localized floods, including flash floods.
  • Model accounts for the hydrological response to rainfall, including the space-time patterns of rain, effects of a highly variable climate, topography, local geology, soil type, antecedent conditions, land use and land cover, flow routing, effects of lakes, man-made flood defenses and flood regulation, diversions, and other local factors.
  • Flood intensity is determined based on inundation (water) depth.
  • On-floodplain inundation depth is calculated using a one-dimensional hydraulic model combined with a two-dimensional (2D) shallow water flood mapping tool.
  • Off-floodplain and small catchment inundation depth is calculated using a 2D shallow water model.
  • Event definition is based on a 504-hour duration clause.
Vulnerability
  • All flood damage functions (buildings and contents) use a component-based approach that assesses damage at a granular level, rather than for a building as a whole.
  • Supported primary risk characteristics include construction, occupancy, and height.
  • Support for demand surge
Catalogs and event sets
  • Stochastic catalog(s)
    • 10,000-year catalog
  • Historical event set
    • Six events
      • 2006 Malaysia Flood
      • 2007 Jakarta Flood
      • 2013 Jakarta Flood
      • 2014 Malaysia Flood
      • 2019 Jakarta Flood
      • 2021 Malaysia Flood

Touchstone-specific details

  • Support for specialized risk types
    • Builder's risk
    • Infrastructure
    • Large industrial facilities
    • Marine
  • Supported construction and occupancy codes
    • Construction: 140 classes (including 20 marine asset classes)
    • Occupancy: 128 classes (including 62 large industrial facility and 12 marine storage classes)
  • Support for 12 secondary risk characteristics
    • Backwater valve protection
    • Base flood elevation
    • Basement finish type
    • Basement level count
    • Content vulnerability
    • Custom elevation
    • Custom flood standard of protection
    • First floor height
    • Floor of interest
    • Foundation type
    • Service equipment protection
    • Wet floodproofing
  • Touchstone geographic resolutions
    • Country
    • CRESTA
    • Area
    • Sub area
    • Postal code
    • User-specified latitude/longitude
  • Geographic variability of exposure distribution for buildings with unknown characteristics and combinations is captured by accounting for local building attributes.
  • Support for flood hazard maps/geospatial layers (20-, 50-, 100-, 200-, 250-, and 500-year return periods).
  • Support for 1-km disaggregation.

Touchstone Re-specific details

  • New and updated Industry Exposure Databases
    • Malaysia - new
      • Vintage: 2024
      • Resolution: 1 km
    • Indonesia - updated
      • Vintage updated/indexed to 2024
      • Resolution: 1 km
  • Touchstone Re lines of business and coverages
    • Residential (buildings, contents, building and contents)
    • Commercial and industrial (building, contents, building and contents)
    • Automobile
    • Agriculture
  • Touchstone Re geographic resolutions
    • Country
    • CRESTA
1 Model does not include all islands in Indonesia.