Libya – A Brazilian English-language website, “Calcadao Petróleo e Gás,” published a report. It discussed visible signs from space. These signs are in one of the driest regions on Earth. The report mentioned giant agricultural circles in southeastern Libya. They reveal extensive human activity. This activity relies on groundwater deep within the Sahara Desert.
Giant Circles in Al-Kufra Oasis
Al-Marsad newspaper followed and translated key parts of the report. It clarified that these signs appear as circles. Each circle measures about one kilometer in diameter. They are located in the Al-Kufra oasis region. These circles reveal massive sites. They pump fossil groundwater buried under the desert for thousands of years.
The report noted these circles are clearly visible from space. This is based on records and images from NASA’s Earth Observatory. Astronaut observations from the International Space Station also confirm this. The unusual scene in Al-Kufra draws attention. This is due to the sharp contrast between green areas and the surrounding desert.
Pivot Irrigation and High-Tech Agricultural Engineering
According to the report, NASA describes these formations as agricultural areas. They are irrigated using a pivot irrigation system. This is clearly visible in orbital images taken over the Sahara Desert.
These circles are not natural phenomena. They are irrigated areas within a high-tech agricultural system. This system relies on extracting water from a massive underground reservoir. Agriculture in this environment is only possible through hydraulic engineering.
The report confirmed Al-Kufra Oasis sits atop one of the world’s largest irrigation projects. This project is linked to the Nubian Sandstone Aquifer. It has transformed part of the desert into a productive area. Satellite images show what the report called an artificial mosaic. This represents a prime example of agricultural engineering in a harsh desert environment.
Why Do Farms Appear Circular?
The report explained the circular shape of these agricultural areas. It is directly due to the pivot irrigation system. A rotating device evenly distributes water around a fixed point. This is done via a long metal arm equipped with sprinklers. The arm continuously rotates around a central axis.
Water distribution occurs radially. A near-perfect circle forms when the device completes its rotation. This makes these areas easily distinguishable in satellite images. They are also visible to the naked eye from space. They appear as a very clear geometric pattern.
Agriculture in a Riverless Region
The report described Al-Kufra Oasis as an extremely isolated area. Vast expanses of desert surround it. It has no permanent rivers. There are also no natural surface water sources.
The image shows dozens of regularly distributed circles. They resemble a vast industrial project more than a familiar land formation. These areas are used for cultivating food crops. This includes wheat, alfalfa, and other grains. These are essential for local food security.
Fossil Water and Man-made River
The report clarified that the water for this system comes from the Nubian Sandstone Aquifer. This aquifer extends across several North African countries. It is one of the world’s largest underground reservoirs.
These waters are fossil waters. They differ from aquifers replenished by recent rainfall. This means they accumulated thousands or even millions of years ago. This occurred during climatic periods vastly different from current conditions. Farms access this water through deep wells used for irrigation.
The Great Man-Made River Project expanded the utilization of these resources. It is one of the world’s largest hydraulic engineering projects. It uses an underground pipeline network. This transports water from the aquifer to various regions in Libya. This has allowed for the expansion of agricultural land in desert areas. It also supplies urban centers far from water sources.
Striking View from Space and Sustainability Concerns
According to the report, the combination of the Great Man-Made River Project and pivot irrigation created an agricultural belt. This is located in the heart of the Sahara Desert. This scene embodies a stark contrast. It exists within one of the driest environments on Earth.
The visual impact of these circles is largely due to the contrast with the surrounding environment. Any vegetation cover in this region relies entirely on artificial irrigation. This makes these precisely defined green areas clearly prominent in satellite images.
Different colors appearing in these circles reflect the stages of crop growth. Darker green shades indicate active plants. Lighter colors represent harvesting, soil preparation, or rest periods. In some cases, red hues may appear. These are linked to crop type or soil characteristics.
The report viewed this color diversity as transforming the landscape into a dynamic pattern. Each circle functions as an independent production unit. It has its own agricultural cycle. NASA confirmed these patterns are easily observable from space.
Conversely, the report highlighted increasing sustainability concerns. The success in establishing these agricultural areas does not negate worries about groundwater depletion. This aquifer does not significantly replenish under current climatic conditions. This opens a discussion about balancing agricultural expansion with natural resource preservation.