The diagram shows this better than I can explain it. At a gage height of 1 foot, our stream has the amount of water (flow) represented by the blue area. Let's say it rains and the water rises to 2 feet. The additional flow is represented by the green area.
Closest Airport to Washington, D. C., DC. The closest airport to Washington, D. C. is Ronald Reagan Washington National Airport (DCA). Distance from Ronald Reagan Washington National Airport to Washington, D. C., DC is 4,8 kilometers (3,0 miles).
Reagan National Airport is located just across the Potomac River in Virginia and is the closest airport to DC. It is accessible via its own Metro stop on the Blue and Yellow Lines. (Itâs also the airport youâre most likely to spot senators and representatives heading home to their districts).