Deciphering the Palette of Lake Nasser: A Tale of Two Banks

by Hiroshi Tanaka
8 comments
Lake Nasser's Color Contrast

The striking color disparities on the east and west shores of Egypt’s Lake Nasser are a result of varying quantities of sand coverage. The higher the sand concentration, the lighter the shades, while a lower concentration reveals darker earth.

The dramatic color differences between the lake’s western and eastern shores are attributed to variations in sand cover.

A snapshot of a brief 30-kilometer (approximately 20-mile) stretch of Lake Nasser—one of the largest man-made lakes globally—was taken by an astronaut aboard the International Space Station. This colossal 500-kilometer (300-mile) reservoir came into existence after the construction of the Aswan High Dam on the Nile River in Aswan, Egypt. The dam’s development, primarily spearheaded by Egypt’s ex-president Gamal Abdel Nasser, after whom the northern two-thirds of the lake in Egypt is named. The Sudanese portion also goes by the name of Lake Nubia.

One remarkable characteristic noticeable in this image is the contrasting landscape on both sides of the lake. The geological structure in this vicinity comprises medium to coarse-grained sandstone. The west and east shores’ color discrepancy is due to the tan sand, sourced from the west, overlaying the bedrock on that shore. In comparison, the eastern shore showcases exposed rock surfaces with little to zero sand cover. This is because the wind’s strength isn’t sufficient to transfer sand across the Nile Valley.

The astronaut photograph labeled ISS069-E-442 was captured on April 1, 2023, with a Nikon D5 digital camera, employing a 50-millimeter focal length. It is supplied by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit at the Johnson Space Center. The image was snapped by a member of the Expedition 69 crew. To enhance the picture’s contrast and remove lens distortions, the image has been cropped and adjusted. The International Space Station Program facilitates this laboratory as part of the ISS National Lab. This initiative assists astronauts in photographing Earth’s images of utmost scientific and public value and ensures these images are freely accessible on the internet. The caption was provided by Minna Adel Rubio, GeoControl Systems, JETS Contract at NASA-JSC.

Frequently Asked Questions (FAQs) about Lake Nasser’s Color Contrast

What causes the color contrast on the banks of Lake Nasser?

The stark contrast in color on the east and west banks of Lake Nasser is caused by the varying amounts of sand coverage. More sand leads to lighter hues, while less sand reveals darker soil.

Who took the photograph of Lake Nasser?

The photograph of Lake Nasser was taken by an astronaut aboard the International Space Station during the Expedition 69 mission.

When was the photograph of Lake Nasser taken?

The photograph was taken on April 1, 2023.

What equipment was used to capture the photograph of Lake Nasser?

The photograph was captured using a Nikon D5 digital camera with a focal length of 50 millimeters.

Why is Lake Nasser named so and how did it form?

Lake Nasser, one of the world’s largest artificial lakes, is named after Egypt’s former president, Gamal Abdel Nasser, who initiated the construction of the Aswan High Dam on the Nile River. The dam resulted in the formation of the lake.

How is the eastern bank of Lake Nasser different from the western bank?

The western bank of Lake Nasser is covered by tan sand from sources to the west, covering the underlying rock, resulting in a lighter color. In contrast, the eastern bank is characterized by exposed rock surfaces with little to no sand coverage, resulting in a darker appearance.

More about Lake Nasser’s Color Contrast

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8 comments

HistoryBuff July 18, 2023 - 10:24 am

Nasser’s vision gave us more than just a dam, it created a whole lake. Talk bout leaving a legacy.

Reply
StarGazer July 18, 2023 - 11:40 am

Theres something special bout seeing our planet from space’s perspective…its like all the differences just blend together into one gorgeous pic.

Reply
NatGeoLover July 18, 2023 - 1:40 pm

Always been fascinated by Lake Nasser, its construction history is so cool. What a sight from space!

Reply
DustyTrails July 18, 2023 - 4:17 pm

So it’s the wind, or lack thereof, that makes the east bank darker…nature’s wild, ya know?

Reply
SpaceIsAwesome July 18, 2023 - 7:43 pm

Wow, ISS photographs are just… wow. Blows my mind how they capture these details from so far above.

Reply
James4Science July 18, 2023 - 8:09 pm

Amazing how something as simple as sand can make such a difference! Nature’s own paintbrush, huh?

Reply
GeoGeek July 19, 2023 - 2:24 am

This is y i love geology. Its like the earth is a big art canvas n nature is the artist!

Reply
WanderlustDreams July 19, 2023 - 5:53 am

would love to see this in person one day! Egypt’s on my bucket list… such rich history and beautiful landscapes.

Reply

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