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Summaryedit
Description |
English: This astronaut photograph shows a 29-kilometre stretch of the Paraná, downstream of the small city of Goya, Argentina (just off the top left of the image).
The Paraná River ranges up to 3 kilometres wide along the reach illustrated in this image. The main channel is deep enough to allow smaller ocean-going ships to pass north to the capital city of Asunción, Paraguay, fully 1,200 kilometres inland and well out of the image. The river’s dark brown shading indicates a heavy load of muddy sediment; smaller side channels also carry this mud. Numerous lakes are typical on active floodplains, and appear here as irregular bodies of water. Some appear brown, indicating that they probably have been refilled during recent rises and floods of the active channels. The Paraná floodplain occupies the entire image; it is so wide—18 kilometres in this view—that its banks are not visible. Numerous curved, meandering channels are the most prominent characteristic of the floodplain, indicating prior positions of the river and its channels. As riverbeds move laterally by natural processes, they leave remnants of their channels, which appear as lakes and finally fill with mud. This is an excellent image for illustrating these meander forms. From a geological standpoint, it is interesting that almost all of the old channels are similar in curvature to today’s side channels. However, almost none of them seem to show prior positions of the main, wide Paraná channel. |
Date | |
Source | NASA Earth Observatory |
Author | ISS Expedition 27 crew |
Camera location | View this and other nearby images on: OpenStreetMap - Google Maps - Google Earth |
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This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: ISS027-E-11058. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing for more information. |
Image acquired with a Nikon D2Xs digital camera using a 400 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center.
Licensingedit
This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |
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Warnings:
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Annotations | This image is annotated: View the annotations at Commons |
Public Domain
EXIF data: | |
File name | parana__river_floodplain__northern_argentina.jpg |
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Size, Mbytes | 3.890205078125 |
Mime type | image/jpeg |
Camera manufacturer | NIKON CORPORATION |
Camera model | NIKON D2Xs |
Orientation of image | 1 |
Image resolution in width direction | 240 |
Image resolution in height direction | 240 |
Unit of X and Y resolution | 2 |
Exposure time | 1/500 sec (0.002) |
F number | f / 8 |
Exposure program | 4 |
ISO speed rating | 200 |
Exif version | 0221 |
Lens focal length | 400 mm |
Date and time original image was generated | 2011:04:09 14:53:40 |
Date and time image was made digital data | 2011:04:09 14:53:40 |
Shutter speed | 8.965784 |
Aperture | 6 |
Exposure bias | 0 |
Maximum lens aperture | 3 |
Metering mode | 3 |
User comments | ASCII NASA 1112 81.9F |
Color space information | 1 |
Exif image width | 4288 |
Exif image length | 2850 |
Sensing method | 2 |
Scene type | |
CFA pattern | |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 600 mm |
Contrast | 1 |
Software used | Microsoft Windows Photo Gallery 6.0.6001.18000 |
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