Drain Mapping for Flood Modelling.

Ramani Huria 2.0 is collecting drainage information in the most flood prone areas across Dar es salaam. This information is used to develop a flood model which requires accurately collected specifications of drains such as depth, width, blockage (by either vegetation or material), connectivity, and diameter (typically for culverts). To develop this model, Ramani Huria is working with a hydrologist in Deltares- Netherlands, Hessel Winsemius. Dr Hessel is an expert in the field of hydrology, with particular applications in global and regional flood risk modelling. This week he was in Dar es Salaam,…Read more

Building Open Tools to Map Drains

Ramani Huria's goal is resilience: to reduce the human impact of flooding. The most obvious way to do this is to reduce the likelihood of floods! Drainage is one of the ways to do so. Culvert                                                                                  Concrete Drain Silt Trap                           …Read more

Participatory Mapping for Historical Flood Inundation Extents

As the neighbourhoods of Ramani Huria have been mapped, it is now possible to start building upon these maps. This can take many forms, but the community is at the heart of how these maps are being used. One approach is participatory mapping, where community members and local government leaders work together to sketch out the extents of historical flood events, drainage systems, ultimately mapping out flood prone areas. By sharing their historical flooding information, it is then possible to more accurately identify at-risk zones and propose temporary evacuation centers. So far, this…Read more

Mapping Drainage in Dar es Salaam

Every year during the rainy season, Dar suffers from devastating floods that wipe out roads, destroy houses, and result in deaths, sickness, and millions of dollars worth of damages. By helping communities to map their wards, Ramani Huria is able to support disaster prevention and response to areas that were previously off the map, literally. One key element of these maps is drainage systems. We have dedicated mappers working to ensure these, as well as wetland zones and flood-prone areas, are included accurately in our maps. Some areas of Dar es Salaam are…Read more

Recent flooding in Dar shows need for maps

For the past 5 days it has been raining non-stop in Dar es Salaam, causing damaging floods across the city. Schools and hospitals have been closed, roads washed out, and business forced to a standstill, making the city lose billions of shillings. In Jangwani neighborhood, a bridge that connects the city to its outskirts was totally submerged in water, causing the police to close the road for more than 24 hours. In the last week, 3 people were reported dead as a result of their houses being submerged underwater. The floods come every…Read more

Drainage in Tandale

Tandale is an administrative ward in the Kinondoni district of the Dar es Salaam Region of Tanzania. According to the 2002 census, the ward has a total population of 45,058 people. It’s the Second Ward under Community Mapping For Flood Resilience project to be mapped to OpenstreetMap. A lot can be observed from the last time this area was massively mapped on OpenStreetMap by The GroundTruth Initiative led by Mark Iliffe in 2011. Tandale Ward Office CREDIT: Ramani Huria Settlement in Tandale has increased drastically making accessibility to clean water and proper sanitation…Read more