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.

Organization
Tomorrow's Cities
Version
1

Resources

  • Nairobi Multi Hazard Dataset

    application/geo+json

    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.

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    Media Type application/geo+json
    Reference coordinate system EPSG:4326

  • Nairobi Future Exposure Dataset - Business

    application/geo+json

    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.

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    Media Type application/geo+json
    Reference coordinate system EPSG:4326

  • Nairobi Future Exposure Dataset - Elders

    application/geo+json

    Future urban exposure dataset for Elders community planning scenario. Data formats: GeoJSON, XLSX.

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    Media Type application/geo+json
    Reference coordinate system EPSG:4326

  • Nairobi Future Exposure Dataset - Women

    application/geo+json

    Future urban exposure dataset for Women community planning scenario. Data formats: GeoJSON, XLSX.

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    Media Type application/geo+json
    Reference coordinate system EPSG:4326

  • Nairobi Future Exposure Dataset - Youth1

    application/geo+json

    Future urban exposure dataset for Youth Group 1 community planning scenario. Data formats: GeoJSON, XLSX.

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    Media Type application/geo+json
    Reference coordinate system EPSG:4326

  • Nairobi Future Exposure Dataset - Youth2

    application/geo+json

    Future urban exposure dataset for Youth Group 2 community planning scenario. Data formats: GeoJSON, XLSX.

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    Media Type application/geo+json
    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).

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    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).

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    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).

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    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).

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    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).

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    Reference coordinate system EPSG:4326

Dataset Info

ID of dataset rdls_hevl-ken_tmrwcities_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

Hazard Component

Event Set Analysis Type Calculation Method
event_set_flood_nairobi Probabilistic Simulated
Event Start End Hazard Type Hazard Process
event_flood_nairobi_100yr Flood Fluvial Flood

Exposure Component

Exposure Category
exposure_buildings Buildings
Metric Dimension Unit
metric_building_count Structure Count
metric_building_replacement_value Structure
metric_building_footprint_area Structure
Exposure Category
exposure_population Population
Metric Dimension Unit
metric_population_residents Population Count
metric_population_households Population Count
metric_population_individuals Population Count
Exposure Category
exposure_landuse
Metric Dimension Unit
metric_landuse_area Structure

Loss Component

Loss Loss Type Impact Unit
loss_flood_buildings Ground up
loss_flood_population Ground up

Vulnerability Component

Vulnerability Function Category Analysis Type Approach
vulnerability_function_flood_buildings Buildings Probabilistic Analytical