Controlling floods to protect historic buildings

What we propose: collect and drain rainwater upstream of vulnerable buildings and harmoniously integrate hydraulic works with the architecture and environment of historic sites

Water damage on the Petra monument in Jordan

Some applications of this approach:

In Jordan, UNESCO asked the Global Devlopment group to reconstruct the water management systems put in place by the Nabataeans to allow the development of Petra, their capital city, 2,000 years ago. The ruin of these systems leads to water runoff on the facades of the Royal Tombs and their degradation. Bernard Collignon has identified and diagnosed the canals and reservoirs whose restoration would allow the preservation of this emblematic site.

In Vietnam, the Syndicat d'Assainissement de Paris has entered into a long-term partnership with the city of Hue, the former imperial capital. The floods of the La Y river invade the citadel every year and eat away at the foundations of the buildings. Bernard Collignon, at Hydroconseil, has studied a system of inflatable dams designed to protect this historic center from flash floods.

What others do better: engineering large dams
and large water treatment plants
Photo: Wastewater treatment plant