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).
Niagara Falls International Airport is obviously the closest airport to the city. It only flies charters and tourism flights and is located on the US side. 2. The closest commuter airport on the US side is Buffalo International Airport. 3. The closest commuter airport on the Canadian side is John C Munro Hamilton International Airport.