Government of the People's Republic of Bangladesh logo Hazard Risk
25-year return periods 50-year return periods 100-year return periods 150-year return periods
Opacity
25-year return periods 50-year return periods 100-year return periods
Opacity
due to rainfall due to earthquake
Opacity
Pre-Monsoon Drought 10-year return periods 50-year return periods 100-year return periods Kharif Drought 10-year return periods 50-year return periods 100-year return periods
Opacity
PGA corresponding to earthquake 50-year return periods 100-year return periods 200-year return periods 500-year return periods 1000-year return periods
Opacity
50-year return periods 100-year return periods 200-year return periods 500-year return periods 1000-year return periods
Opacity Flood 25-year return periods Flood 50-year return periods Flood 100-year return periods Flood 150-year return periods Storm surge 25-year return periods Storm surge 50-year return periods Storm surge 100-year return periods Landslide due to rainfall Landslide due to earthquake Pre-Monsoon drought 10-year return periods Pre-Monsoon drought 50-year return periods Pre-Monsoon drought 100-year return periods Kharif drought 10-year return periods Kharif drought 50-year return periods Kharif drought 100-year return periods Earthquake 50-year return periods Earthquake 100-year return periods Earthquake 200-year return periods Earthquake 500-year return periods Earthquake 1000-year return periods Tsunami 50-year return periods Tsunami 100-year return periods Tsunami 200-year return periods Tsunami 500-year return periods Tsunami 1000-year return periods Population (MRVA Project, DDM) Female Population (MRVA Project, DDM) Male Population (MRVA Project, DDM) Cyclone Shelter (MRVA Project, DDM) Educational Institution (MRVA Project, DDM) Health Facilities (MRVA Project, DDM) Police Station (MRVA Project, DDM) Fire Station (MRVA Project, DDM) Power Stations (MRVA Project, DDM) Bridge (MRVA Project, DDM) Road (MRVA Project, DDM) Railway (MRVA Project, DDM) Power Lines (MRVA Project, DDM)
Hazard:
Flood 25-year return periods
Exposure:
Population
  • The darkest brown values show where high values of both population density and hazard.
  • The darkest red values show where hazard areas, but less likely to have people.
  • The darkest green values show where there is a high amount of population density, but fewer people live in hazard areas.
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Understanding risk map (bivariate map)

Risk maps are a new way to visualize and combine hazard and exposure data. It allows you to map two patterns within a single map and help you see if two things are related.

This is done using a technique known as bivariate choropleth mapping, where two color ramps combine into a hexagons-grid legend showing all pattern combinations.

When making a bivariate choropleth map, the goal is to show a sequence of two variables and their combinations.