E4DRR/rim2d-simulations

RIM2D East Africa Flood Simulations

Event-based 2D hydraulic inundation simulations for the GHACOF flood storyline workshop (May 2026), produced under the ICPAC E4DRR / CRAF'D project.

Cases

Each <case>/ directory is self-contained and can be re-run with RIM2D:

<case>/
├── input/
│   ├── dem.nc                  Copernicus GLO-30 DEM → reference grid
│   ├── buildings.nc            Overture Maps building fraction raster
│   ├── channel_mask.nc         channel mask (WorldCover-derived)
│   ├── iwd.nc                  initial water depth
│   ├── roughness.nc            Manning's n (from WorldCover class)
│   ├── pervious_surface.nc     GHSL-derived pervious fraction
│   ├── sealed_surface.nc       GHSL-derived sealed fraction
│   ├── sewershed.nc            sewershed extent (currently uniform)
│   ├── outflowlocs.txt         outflow point list
│   ├── fluvial_boundary_none.txt
│   └── rain/imerg_t*.nc        per-30-min IMERG V07 rainfall frames
├── output/
│   ├── case_v1_wd_<t>.nc       water depth at sim second <t>
│   ├── case_v1_vel_<t>.nc      flow velocity at sim second <t>
│   ├── case_v1_wd_max.nc       max-depth envelope
│   ├── case_v1_vel_max.nc      max-velocity envelope
│   ├── case_v1_wd_max_t.nc     time of max depth (s since start)
│   └── case_v1_mask.nc
└── simulation_v1.def           RIM2D model definition (flex format)

This dataset holds only the science inputs/outputs + model config. Viewer assets, curated storyline narratives, and stakeholder validations are co-production artefacts and live in a separate repo (https://github.com/HillaryKoros/DevOps-hazard-modeling).

Cases included (initial release)

Case slug	Country	Event date	Sim duration	Domain
nairobi_2026-03-06	Kenya	06 Mar 2026	24 h	Nairobi metro
nile_2024_abu_hamad	Sudan	25–30 Aug 2024	6 d	Abu Hamad
ssd_2025-10-05	South Sudan	05 Oct 2025	24 h	Upper Nile (Renk area)
eth_2021-08-16	Ethiopia	16–18 Aug 2021	3 d	Addis Akaki river
uga_2019-05-26	Uganda	26–28 May 2019	3 d	Central Uganda (Kampala)
eri_2019-08-10	Eritrea	10–15 Aug 2019	5 d	Asmara plateau highlands
som_2023-11-19	Somalia	19–21 Nov 2023	3 d	Lower Shabelle
dji_2019-11-21	Djibouti	21–23 Nov 2019	3 d	Djibouti City
tza_2024-04-10	Tanzania	10–17 Apr 2024	7 d	Dar es Salaam metro
rwa_2023-05-01	Rwanda	01–06 May 2023	5 d	Western + Northern provinces
bdi_2024-04-01	Burundi	01–22 Apr 2024	21 d	Bujumbura + central Burundi
tza_2024-04-10	Tanzania	10–17 Apr 2024	7 d	Dar es Salaam

Preview animations

Each case ships with a preview.gif showing the water-depth evolution.

Case	Preview
Nairobi (KEN)
Sudan Nile (SDN)
South Sudan (SSD)
Addis Akaki (ETH)
Uganda Central (UGA)
Eritrea Highlands (ERI)
Somalia Lower Shabelle (SOM)
Djibouti City (DJI)
Dar es Salaam (TZA)
Rwanda W/N (RWA)
Burundi (BDI)

All cases share a common pipeline: GEE (DEM/MERIT/WorldCover/GHSL) + Overture (buildings/roads) + TDX-Hydro (rivers) + IMERG V07 (rainfall) → prepare_rim2d_case.py → RIM2D GPU.

Reproduce a case

cd <case>
# rain frames live at ../<case>/input/rain/ relative to v1/
RIM2D simulation_v1.def --def flex

Source code for the pipeline: https://github.com/icpac-igad/DevOps-hazard-modeling/tree/main/hazard-model-api

Storyline schema

Each storyline.json is structured for workshop co-production:

• event — title / date / country / trigger / description
• hydromet — auto-extracted rainfall + RIM2D statistics
• forecast_signal — counterfactual EPS analysis (TODO)
• impact — population, displacement, fatalities, sectors (TODO from EM-DAT/IFRC)
• mobility — IDP camps in inundated zone (TODO from IOM DTM / IDMC)
• narrative — setup / peak / response / lesson (curated)

License

CC BY 4.0 — please cite as:

ICPAC E4DRR / GHACOF (2026). RIM2D East Africa Flood Simulations dataset. HuggingFace Datasets: E4DRR/rim2d-simulations.

Contact

ICPAC E4DRR project — Hillary Koros

• hillary.koros@igad.int
• koroshillary12@gmail.com