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).
The closest international airport is Sea-Tac, the airport serving Seattle and Tacoma. From the airport, it takes about 15 to 30 minutes to get to Pier 66 by taxi and 30 to 60 minutes to reach Pier 91. Two shuttle services are available between the airport and cruise terminals, Gray Line of Seattle and Shuttle Express. By King County Metro bus, you can reach Pier 66 via bus route 99 and Pier 91 via bus routes 15, 19, 24 and 33 to Magnolia Bridge.