Interior Drainage Hydrology & Hydraulics for the Design of a Federal Flood Risk Management Project in Downtown Norfolk
The U.S. Army Corps of Engineers (USACE) in cooperation with the City of Norfolk intends to build a coastal storm risk management project along the City’s Eastern Branch of Elizabeth River shoreline. This project along with other City’s flood mitigation projects such as the St. Paul’s Blue/Greenway transformation project could potentially impact the interior drainage system within this watershed.
This study intends to address the impacts concerning the interior drainage hydrological and hydraulic (H&H) processes including the pre-existing hydrology and hydraulic condition, near future land-use transformations and construction activities on the St. Paul’s area, and future climate conditions on the Federal Flood Risk Management Project.
The focus of this presentation is to:
- Describe the integration of the previously developed stormwater models for larger areas into a 1D/2D XPSWMM stormwater model covering this interior drainage system and assessment of the H&H condition.
- Discuss changes to the watershed that the St. Paul’s redevelopment and Blue/Greenway resilience projects would make by introducing land-use transformations and proposing various stormwater elements such as building resilience ponds and open channels and replacing the pre-existing stormwater systems and comparison with the existing condition.
- Evaluate the pumping capacities for multiple pump stations anticipated for the Federal Flood Risk Management Project in Downtown Norfolk using the integrated 1D/2D XPSWMM model and analysis of the impacts on the interior drainage system.