The Potomac River is among the wildest rivers in the world and it relatively often reaches flood stages because of events in distant areas of its watershed.
On behalf of the Department of Energy and Environment in Washington DC ( DoEE) Ramboll has therefore assisted with technical advice, financial analysis and training in the development of master plan, guidelines and pilot project for fire protection and stormwater protection using LAR, nature-based coastal protection and green infrastructure in an existing building at Buzzard Point in Washington, South of Capitol Hill.
Through advanced hydraulic modelling Ramboll illustrated that the planned level of resiliency towards storm surge and sea level rise only has limited effect on reducing flooding in the future.
Ramboll hence conducted a cost-benefit analysis for the currently proposed protection level and for a recommended higher protection level, to illustrate the value of increasing resilience compared to the current situation, both in terms of reduced risks, but also in terms of added value.
The riverine protection measures are proposed as a mix of grey infrastructure and BGI. Added value includes an extension of an existing Riverwalk trail, additional green space, living shoreline concept and increased access to the river.