File:Paraná River Floodplain, Northern Argentina.jpg
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Summary[edit]
DescriptionParaná River Floodplain, Northern Argentina.jpg |
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 | 29° 12′ 00″ S, 59° 24′ 00″ W | View this and other nearby images on: OpenStreetMap | -29.200000; -59.400000 |
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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. Other languages:
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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.
Licensing[edit]
Public domainPublic domainfalsefalse |
This file is in the public domain in the United States 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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Annotations InfoField | This image is annotated: View the annotations at Commons |
past channels
active side channel
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current | 11:54, 2 May 2011 | 4,288 × 2,850 (3.8 MB) | Originalwana (talk | contribs) |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D2Xs |
Exposure time | 1/500 sec (0.002) |
F-number | f/8 |
ISO speed rating | 200 |
Date and time of data generation | 14:53, 9 April 2011 |
Lens focal length | 400 mm |
Orientation | Normal |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Software used | Microsoft Windows Photo Gallery 6.0.6001.18000 |
File change date and time | 12:47, 2 May 2011 |
Exposure Program | Shutter priority |
Exif version | 2.21 |
Date and time of digitizing | 14:53, 9 April 2011 |
APEX shutter speed | 8.965784 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Spot |
Light source | Unknown |
Flash | Flash did not fire |
DateTime subseconds | 81 |
DateTimeOriginal subseconds | 81 |
DateTimeDigitized subseconds | 81 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 600 mm |
Scene capture type | Standard |
Contrast | Soft |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |