Tomorrow's Cities Multi-Hazard Risk Assessment Dataset for Chattogram (Bairag), Bangladesh

Multi-hazard risk data package for the Bairag area in Chattogram, Bangladesh, providing earthquake and flood hazard layers, synthetic future urban exposure datasets (buildings, households, individuals, land use, road networks) for four community planning scenarios (Civil Society, Farmers/Fishermen, Informal Working, Landless), vulnerability/fragility functions for buildings and infrastructure, and impact assessment results. Developed as part of the Tomorrow's Cities GCRF Urban Disaster Risk Hub project for risk-informed decision making in urban planning.

Resources

Chattogram Multi Hazard Dataset GeoTIFF (tif) (Details)

Multi-hazard dataset containing: (1) Earthquake hazard rasters for two scenarios - Sc1 using NGA-West2 GMPEs (Abrahamson et al 2014, Boore et al 2014, Campbell & Bozorgnia 2014, Chiou & Youngs 2014) for active shallow crustal sources, and Sc2 using subduction zone GMPEs (Atkinson & Boore, Zhao et al), each providing PGA and SA at 0.3s, 0.7s, 1.0s periods in 32-bit and 64-bit precision (48 rasters total); (2) Flood hazard rasters for riverine and pluvial scenarios with water depth; (3) Terrain DEM from NASADEM; (4) Vulnerability/fragility functions for buildings, roads, and power networks. Data formats: GeoTIFF for hazard rasters, Shapefile for vector flood data, Excel (XLSX) for vulnerability/fragility functions.

Reference coordinate system	EPSG:4326

Chattogram Future Exposure Dataset - Civil Society GeoJSON (geojson) (Details)

Future urban exposure dataset for Civil Society community planning scenario, including building footprints with structural taxonomy, household socio-economic data, individual demographic data, land use plan, and road network. Data formats: GeoJSON for spatial data (buildings, landuse, road network), JSON for tabular data (households, individuals).

Reference coordinate system	EPSG:4326

Chattogram Future Exposure Dataset - Farmers Fishermen GeoJSON (geojson) (Details)

Future urban exposure dataset for Farmers/Fishermen community planning scenario, including building footprints with structural taxonomy, household socio-economic data, individual demographic data, land use plan, and road network. Data formats: GeoJSON for spatial data (buildings, landuse, road network), JSON for tabular data (households, individuals).

Reference coordinate system	EPSG:4326

Chattogram Future Exposure Dataset - Informal Working GeoJSON (geojson) (Details)

Future urban exposure dataset for Informal Working community planning scenario, including building footprints with structural taxonomy, household socio-economic data, individual demographic data, land use plan, and road network. Data formats: GeoJSON for spatial data (buildings, landuse, road network), JSON for tabular data (households, individuals).

Reference coordinate system	EPSG:4326

Chattogram Future Exposure Dataset - Landless GeoJSON (geojson) (Details)

Future urban exposure dataset for Landless community planning scenario, including building footprints with structural taxonomy, household socio-economic data, individual demographic data, land use plan, and road network. Data formats: GeoJSON for spatial data (buildings, landuse, road network), JSON for tabular data (households, individuals).

Reference coordinate system	EPSG:4326

Chattogram Impact Results - Civil Society File Geodatabase (gdb) (Details)

Impact assessment results for earthquake and flood hazards under the Civil Society community planning scenario, including building damage states and affected population. Data formats: ESRI File Geodatabase (GDB) and GeoJSON.

Reference coordinate system	EPSG:4326

Chattogram Impact Results - Farmers File Geodatabase (gdb) (Details)

Impact assessment results for earthquake and flood hazards under the Farmers/Fishermen community planning scenario, including building damage states and affected population. Data formats: ESRI File Geodatabase (GDB) and GeoJSON.

Reference coordinate system	EPSG:4326

Chattogram Impact Results - Informal Working File Geodatabase (gdb) (Details)

Impact assessment results for earthquake and flood hazards under the Informal Working community planning scenario, including building damage states and affected population. Data formats: ESRI File Geodatabase (GDB) and GeoJSON.

Reference coordinate system	EPSG:4326

Chattogram Impact Results - Landless File Geodatabase (gdb) (Details)

Impact assessment results for earthquake and flood hazards under the Landless community planning scenario, including building damage states and affected population. Data formats: ESRI File Geodatabase (GDB) and GeoJSON.

Reference coordinate system	EPSG:4326

Metadata markdown
Metadata json

RDL Hazard Info

Hazard type
Processes	Fluvial Flood, Ground Motion
Intensity	PGA:g, wd:m
Hazard Analysis Type	Deterministic
Calculation Method	Simulated

RDL Exposure Info

RDL Vulnerability Info

Primary hazard type
Primary process type	Fluvial Flood, Ground Motion
Hazard Analysis Type	Deterministic
Category of exposed asset	Buildings, Infrastructure
Taxonomy	Custom, HAZUS
Impact Metric	Damage ratio
Impact Base Data Type	Simulated
Impact Approach
Metric Approach
Metric relationship	discrete, math_parametric

RDL Loss Info

Hazard Type
Process Type	Fluvial Flood, Ground Motion
Description	Affected population results from earthquake impact assessment for each community planning scenario, derived from building damage states and residential occupancy., Affected population results from flood impact assessment for each community planning scenario, derived from building inundation and residential occupancy., Building damage ratio results from flood impact assessment for each community planning scenario (Civil Society, Farmers/Fishermen, Informal Working, Landless). Damage ratios derived by applying depth-damage vulnerability functions to flood water depth hazard., Building damage state results from earthquake impact assessment for each community planning scenario (Civil Society, Farmers/Fishermen, Informal Working, Landless). Damage states derived by convolving spectral acceleration hazard with building fragility functions.

Additional Info

ID of dataset	rdls_hevl-bgdtmrwcities_chattogram
Publisher of dataset	Tomorrow's Cities
Dataset version	1
Data purpose	To support multi-hazard risk assessment and risk-informed urban planning decision making for Chattogram by providing spatial hazard, synthetic future exposure, vulnerability functions, and impact assessment datasets for participatory community planning scenarios.
Project that produced the dataset	Tomorrow's Cities - GCRF Urban Disaster Risk Hub
Additional details	The dataset includes: (i) earthquake hazard GeoTIFFs for two scenarios - Sc1 using NGA-West2 GMPEs (Abrahamson et al 2014, Boore et al 2014, Campbell & Bozorgnia 2014, Chiou & Youngs 2014) representing active shallow crustal sources, and Sc2 using subduction zone GMPEs (Atkinson & Boore, Zhao et al), each providing PGA and Spectral Acceleration at 0.3s, 0.7s, 1.0s periods in 32-bit and 64-bit precision (48 rasters total); (ii) flood hazard rasters for riverine and pluvial (rainfall) scenarios with water depth as intensity measure, plus NASADEM terrain; (iii) four future exposure dataset variants representing different community planning scenarios, each containing building footprints with structural taxonomy (lateral resistance system, code level, storeys, occupancy), household socio-economic attributes, individual demographic data, land use plans, and road network topology; (iv) fragility functions for earthquake (45 building typologies with 4 damage states) and depth-damage vulnerability functions for flood (495 building typologies at 9 water depths); (v) infrastructure fragility for roads (HAZUS HWB) and power networks (HAZUS ESS); and (vi) impact results for earthquake and flood hazards by community scenario.
Creator	Tomorrow's Cities
Contact Point	Menteşe, E.Y. - Anofa Engineering, Planning and Informatics Ltd.
License	CC0-1.0