File:Merced River, Near Yosemite National Park, California (21385127118).jpg
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Summary
[edit]DescriptionMerced River, Near Yosemite National Park, California (21385127118).jpg |
The Merced River, in the central part of the U.S. state of California, is a 145-mile (233 km)-long tributary of the San Joaquin River flowing from the Sierra Nevada into the Central Valley. It is most well known for its swift and steep course through the southern part of Yosemite National Park, and the world-famous Yosemite Valley. The river's character changes dramatically once it reaches the foothills and the lowlands, becoming a slow-moving waterway meandering through irrigated fields. When tectonic activity first led to the uplift of the Sierra, the river formed as a steep stream eroding into the range's western flank, carrying sediments that would later help form the floor of the Central Valley. A rich riparian zone around the Merced once supported millions of migratory birds along the Pacific Flyway, and the river had one of the southernmost runs of salmon in North America. Indigenous people, including the Miwok and Paiute tribes, lived along the river for thousands of years, thriving on the bountiful flora and fauna supported by the river and its diverse lower course, aided by fertile soils eroded from the mountains. Military expeditions sent by the government of Mexico which then held sovereignty over Alta California passed through the Merced River region in the early 19th century. Later settlers were predominantly American, who discovered gold in the Sierra Nevada, leading to the establishment of a railroad along the river, bringing minerals and lumber to towns that had been established on the lower Merced, and helping increase tourism to the future national park area. Conflicts between whites and indigenous peoples prompted wars, resulting in the expulsion of the Ahwahnechee tribe from Yosemite Valley. In the 20th century, the river saw further development that would change its state forever. Large-scale irrigated agriculture was introduced to the Central Valley in the late 19th century, and led to the construction of numerous state, federal and privately owned dams. Water demand has often been higher than the river's environment can sustain. Salmon have been blocked from migrating and riverside habitat has declined dramatically. Recent years have seen habitat conservation work, mimicking of historic streamflow patterns, and the establishment of a salmon hatchery, in the hopes that the river's health can be protected from further damage. en.wikipedia.org/wiki/Merced_River en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_... |
Date | |
Source | Merced River, Near Yosemite National Park, California |
Author | Ken Lund from Reno, Nevada, USA |
Camera location | 37° 38′ 49.3″ N, 119° 36′ 30.73″ W | View this and other nearby images on: OpenStreetMap | 37.647027; -119.608537 |
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This image was originally posted to Flickr by Ken Lund at https://flickr.com/photos/75683070@N00/21385127118. It was reviewed on 4 December 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
4 December 2015
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current | 04:52, 4 December 2015 | 4,000 × 3,000 (2.72 MB) | INeverCry (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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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 | Canon |
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Camera model | Canon PowerShot SX280 HS |
Exposure time | 1/640 sec (0.0015625) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 09:27, 19 September 2015 |
Lens focal length | 5.84 mm |
Latitude | 37° 38′ 49.3″ N |
Longitude | 119° 36′ 30.73″ W |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 09:27, 19 September 2015 |
Y and C positioning | Co-sited |
Exif version | 2.3 |
Date and time of digitizing | 09:27, 19 September 2015 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 9.3125 |
APEX aperture | 4 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,393.442622951 |
Focal plane Y resolution | 16,393.442622951 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Custom process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
GPS time (atomic clock) | 16:27 |
Receiver status | Measurement in progress |
Geodetic survey data used | WGS-84 |
GPS date | 19 September 2015 |
GPS tag version | 0.0.3.2 |
Rating (out of 5) | 0 |