Tomorrow's Cities Flood Risk Assessment Dataset for Nairobi, Kenya
Flood risk data package for Nairobi, Kenya, providing 100-year return period flood hazard (vector-based depth points), synthetic future urban exposure datasets (buildings, households, individuals, land use) for five community planning scenarios (Business, Elders, Women, Youth1, Youth2), flood depth-damage vulnerability functions for buildings, and flood 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
-
Nairobi Multi Hazard Dataset
GeoJSON (geojson)Flood hazard dataset containing: (1) 100-year return period flood depth GeoJSON (127,422 point features with IM/depth values); (2) Flood depth-damage vulnerability functions for 6,300 building typologies in JSON columnar dict format. Note: Only flood hazard present despite Multi Hazard naming.
Show details →Reference coordinate system EPSG:4326 -
Nairobi Future Exposure Dataset - Business
GeoJSON (geojson)Future urban exposure dataset for Business community planning scenario, including building footprints (5,815 buildings, 116 typologies) with structural taxonomy, household data, individual demographics, and land use plan (110 zones). Data formats: GeoJSON for spatial data, XLSX for tabular data.
Show details →Reference coordinate system EPSG:4326 -
Nairobi Future Exposure Dataset - Elders
GeoJSON (geojson)Future urban exposure dataset for Elders community planning scenario. Data formats: GeoJSON, XLSX.
Show details →Reference coordinate system EPSG:4326 -
Nairobi Future Exposure Dataset - Women
GeoJSON (geojson)Future urban exposure dataset for Women community planning scenario. Data formats: GeoJSON, XLSX.
Show details →Reference coordinate system EPSG:4326 -
Nairobi Future Exposure Dataset - Youth1
GeoJSON (geojson)Future urban exposure dataset for Youth Group 1 community planning scenario. Data formats: GeoJSON, XLSX.
Show details →Reference coordinate system EPSG:4326 -
Nairobi Future Exposure Dataset - Youth2
GeoJSON (geojson)Future urban exposure dataset for Youth Group 2 community planning scenario. Data formats: GeoJSON, XLSX.
Show details →Reference coordinate system EPSG:4326 -
Nairobi Impact Results - Business
File Geodatabase (gdb)Flood impact assessment results for Business scenario, including building damage states and impact metrics. Data formats: GeoJSON, File Geodatabase (GDB).
Show details →Reference coordinate system EPSG:4326 -
Nairobi Impact Results - Elders
File Geodatabase (gdb)Flood impact assessment results for Elders scenario. Data formats: GeoJSON, File Geodatabase (GDB).
Show details →Reference coordinate system EPSG:4326 -
Nairobi Impact Results - Women
File Geodatabase (gdb)Flood impact assessment results for Women scenario. Data formats: GeoJSON, File Geodatabase (GDB).
Show details →Reference coordinate system EPSG:4326 -
Nairobi Impact Results - Youth1
File Geodatabase (gdb)Flood impact assessment results for Youth Group 1 scenario. Data formats: GeoJSON, File Geodatabase (GDB).
Show details →Reference coordinate system EPSG:4326 -
Nairobi Impact Results - Youth2
File Geodatabase (gdb)Flood impact assessment results for Youth Group 2 scenario. Data formats: GeoJSON, File Geodatabase (GDB).
Show details →Reference coordinate system EPSG:4326
Hazard Component
| Hazard type | Flood |
|---|---|
| Processes | Fluvial Flood |
| Intensity | wd:m |
| Hazard Analysis Type | Probabilistic |
| Calculation Method | Simulated |
Exposure Component
| Exposure category | Buildings, Population |
|---|---|
| Taxonomy | GED4ALL |
| Metric Dimension | Population, Structure |
| Metric Quantity Kind | Area, Count, Currency |
Vulnerability Component
| Primary hazard type | Flood |
|---|---|
| Primary process type | Fluvial Flood |
| Hazard Analysis Type | Probabilistic |
| Category of exposed asset | Buildings |
| Taxonomy | Custom |
| Impact Metric | Damage ratio |
| Impact Base Data Type | Simulated |
| Impact Approach | Analytical |
| Metric Approach | Analytical |
| Metric relationship | discrete |
Loss Component
| Hazard Type | Flood |
|---|---|
| Process Type | Fluvial Flood |
| Description | Affected population results from flood impact assessment for each community planning scenario., Building damage state results from flood impact assessment for each community planning scenario (Business, Elders, Women, Youth1, Youth2). |
Dataset Info
| ID of dataset | rdls_hevl-kentmrwcities_nairobi |
|---|---|
| Publisher of dataset | Tomorrow's Cities |
| Dataset version | 1 |
| Data purpose | To support flood risk assessment and risk-informed urban planning decision making for Nairobi 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) 100-year return period flood hazard as vector point grid (127,422 point features) with water depth (IM) values in GeoJSON format, plus flood depth-damage vulnerability functions for 6,300 building typologies at 9 water depths (0-6m) in JSON columnar format; (ii) five future exposure dataset variants representing different community planning scenarios, each containing building footprints (5,815 buildings, 116 typologies in MultiPolygon geometry) with structural taxonomy, household data, individual demographics, and land use plans (110 zones, 25 categories); and (iii) flood impact results per scenario including building damage states, impact metrics, and nearest road node connectivity. Note: Only flood hazard is present despite the Multi Hazard Dataset naming. No road, power, or other infrastructure data in exposure datasets. |
| Creator | Tomorrow's Cities |
| Contact Point | Menteşe, E.Y. - Anofa Engineering, Planning and Informatics Ltd. |
| License | CC0-1.0 |