On June 3rd 2015, heavy rains created flooding that impacted many parts of the Greater Accra Region. Over 200 people lost their lives and many more were displaced and lost property and livelihoods. The floods costs millions as it completely disrupted traffic and economic activities. Read more about the floods in the news here and here or check out Accra Flood Report on facebook
The surface of the city has transformed into a nearly impervious area due the strong increase of the city's population. There is hardly any infiltration of rainwater and retention capacity for flood water is limited. This leads to larger run-off flows that need to drain out of the neighborhoods. In extreme situations like above, roads become devastating rivers.
"The starting point for reducing disaster risk and for promoting a culture of disaster resilience lies in the knowledge of the hazards and the physical, social, economic and environmental vulnerabilities to disasters that most societies face, and of the ways in which hazards and vulnerabilities are changing in the short and long term, followed by action taken on the basis of that knowledge."
Building a drainage model in developing countries is often complicated because of the lack of field data. In this project we build a hydrodynamic model with remote sensing data and optimize it using good quality data gathered through smart field surveys. During fieldwork, the student team will study the impact of waste on the discharge capacity of the urban drainage system. Using Accra as a case study, we aim to develop a methodology for urban flood risk assessment in African cities facing similar problems.