File:Gariep Dam, South Africa ESA23222985.tiff
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[edit]DescriptionGariep Dam, South Africa ESA23222985.tiff |
English: The Gariep Dam, the largest dam in South Africa, is featured in this false-colour image captured by the Copernicus Sentinel-2 mission. Zoom in to see this image at its full resolution or click on the circles to learn more about the features in it. The Gariep Dam, visible in the bottom right of the image, lies along the Orange River, bordering the Free State and Eastern Cape provinces. The dam’s primary purpose is for irrigation, domestic and industrial use as well as power generation. The wall of the Gariep Dam, which is around 88 m high and 900 m long, holds back the Gariep Reservoir and, when full, the reservoir covers an area of around 360 sq km. This image has been processed in a way that highlights vegetation in shades of green and water bodies in black. The water on the east side of the Gariep Dam appears in royal blue owing to a large quantity of sediments coming from the Orange River, therefore appearing brighter than the water flowing out of the west side of the dam. The Orange River plays an important role in the South African economy by providing water for irrigation and hydroelectric power. It rises in the Drakensberg mountains in Lesotho, flowing westwards through South Africa to the Atlantic Ocean. The river is said to be one of the world’s most turbid, and is estimated to deliver around 60 million tonnes of sediment each year to the western margin of South Africa. A significant quantity of this sediment is believed to be from soil erosion, an increasing environmental threat to sustainability in southern Africa. On the northern shore of the dam lies the Gariep Dam Nature Reserve, home to the largest number of Springbok in the country as well as other animals such as zebras, black wildebeest and ostrich. The bright green circular shapes along the Orange River are an example of centre-pivot irrigation systems, where equipment rotates around a centre pivot and crops are fed with water from the centre of the arc. In the left of the image lies the Doornkloof Nature Reserve, at the southern shore of the Vanderkloof Dam (not visible). The reserve is home to kudu, brown hyena and around 170 bird species. The rest of the image is dominated by bare soil and rocky terrain which appear in different shades of pink and red. Straight lines in the image are roads which connect this area to other parts of South Africa. Data from the Copernicus Sentinel-2 mission can help monitor changes in urban expansion, land-cover change and agriculture monitoring. The mission’s frequent revisits over the same area and high spatial resolution also allow changes in inland water bodies to be closely monitored. This image, captured on 30 January 2020, is also featured on the Earth from Space video programme. |
Date | 26 March 2021 (upload date) |
Source | Gariep Dam, South Africa |
Author | European Space Agency |
Other versions |
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Activity InfoField | Observing the Earth |
Mission InfoField | Sentinel-2 |
Set InfoField | Earth observation image of the week |
System InfoField | Copernicus |
Licensing
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This image contains data from a satellite in the Copernicus Programme, such as Sentinel-1, Sentinel-2 or Sentinel-3. Attribution is required when using this image.
Attribution: Contains modified Copernicus Sentinel data 2020
Attribution
The use of Copernicus Sentinel Data is regulated under EU law (Commission Delegated Regulation (EU) No 1159/2013 and Regulation (EU) No 377/2014). Relevant excerpts:
Free access shall be given to GMES dedicated data [...] made available through GMES dissemination platforms [...].
Access to GMES dedicated data [...] shall be given for the purpose of the following use in so far as it is lawful:
GMES dedicated data [...] may be used worldwide without limitations in time.
GMES dedicated data and GMES service information are provided to users without any express or implied warranty, including as regards quality and suitability for any purpose. |
Attribution
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This media was created by the European Space Agency (ESA).
Where expressly so stated, images or videos are covered by the Creative Commons Attribution-ShareAlike 3.0 IGO (CC BY-SA 3.0 IGO) licence, ESA being an Intergovernmental Organisation (IGO), as defined by the CC BY-SA 3.0 IGO licence. The user is allowed under the terms and conditions of the CC BY-SA 3.0 IGO license to Reproduce, Distribute and Publicly Perform the ESA images and videos released under CC BY-SA 3.0 IGO licence and the Adaptations thereof, without further explicit permission being necessary, for as long as the user complies with the conditions and restrictions set forth in the CC BY-SA 3.0 IGO licence, these including that:
See the ESA Creative Commons copyright notice for complete information, and this article for additional details.
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![]() ![]() ![]() This file is licensed under the Creative Commons Attribution-ShareAlike 3.0 IGO license. Attribution: ESA, CC BY-SA IGO 3.0
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:27, 26 March 2021 | ![]() | 5,490 × 5,490 (86.26 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2021/03/gariep_dam_south_africa/23222975-1-eng-GB/Gariep_Dam_South_Africa.tif via Commons:Spacemedia |
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Width | 5,490 px |
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Height | 5,490 px |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Image data location | 31,332 |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 5,490 |
Bytes per compressed strip | 90,420,300 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 22.1 (Windows) |
File change date and time | 10:04, 4 February 2021 |
Color space | Uncalibrated |