Case Study n°1 - Co-evolution Between Mega-Cities’ Development and the Vulnerability to Floods: Lessons from the Yangtze and the Yellow River


The Geneva Water Hub’s Case Studies offer teaching material as a base to facilitating discussion. This first case study explores interlinkages between urban development patterns and the vulnerability to floods. These co-evolution processes are illustrated by the case of two adjacent watersheds, the one of the Yangtze river (Chang Jiang) and the one of the Yellow river (Huang He). The case study sheds light on three structural characteristics that positively impact on the vulnerability to floods: maturity, anthropization and centrality. The case study is supported by a robust and user-friendly set of illustrations highlighting co-evolution processes through maps and graphs. Furthermore, it leads to the discussion around the consideration of both the territorial contingencies and the structural aspects of the design of water governance.

The complete information is available for download in PDF format below. It is composed of two documents in French. The first one “Problematic and Visuals” is addressed to the public. It is designed for projection on a big screen and includes various short texts and visuals (maps, infography, graphs…). The second one “Teaching Annex”) is structured for the facilitator and helps to structure the discussion. It provides a train of thoughts for the presentation. The correspondence between the parts treated in both documents is indicated by the symbols of different colours from the Geneva Water Hub logo: blue, green and black. This symbolism allows the facilitator to structure his remarks and finally to start a discussion with his audience.

Problematic and Visuals

Teaching Annex