Aberdeen Gardens flood viewer

Aberdeen Gardens, Hampton, Virginia

Rain plus tide on the Southwest Branch Back River watershed (65.6 km²), simulated with the Inunda shallow-water model on a 3 m lidar grid. Pick a scenario above. In the viewer, switch between flood depth, flow velocity and depth class, and turn the exposed buildings and flooded roads on or off. Switching scenario keeps your view and mode.

Exposure by scenario (peak depth ≥ 0.1 m)

Depth classes

Read the maps with these in mind

• Exposure uses each scenario's peak depth over the whole event. A building is exposed when water at its footprint reaches 0.1 m; the model terrain has no buildings, so this is the water at its walls, not inside.
• Creeks, tidal water and ponds show as water in every mode. They are left out of the exposure counts, so bridges and lakeshores are not flagged.
• Storm drains are a capacity-limited sink (25 mm/h over the served area) returning water at 81 creek outfalls. Tidal backflow through outfalls is not modelled.
• The design storms hold the tide at 4.3 ft NAVD88 throughout, as the City's Hazen & Sawyer study did, so low land beside the creeks is wet from the first minute.
• Hurricane Matthew uses gauge-corrected MRMS rain and the observed Sewells Point tide. The design storms are NOAA Atlas 14 depths ×1.2, the study's convention.