Why does the water of the Nile change color?

The Nile River originates in central Africa, flows through ancient civilizations such as Sudan and Egypt, and flows north into the Mediterranean Sea, making it the longest river in the world. The Nile is another river that changes color, and over the course of the year, the water changes from clear to green to reddish-brown before finally returning to its basic color. Why is that?

The upper reaches of the Nile are divided into two ends, the White Nile and the Blue Nile, and the two rivers merge with each other, and when the water flows through Cairo, it forms a huge delta with abundant products on both sides. Every year from February to May, it is the dry season, and the river water is clear. Since June, the White Nile River has been flowing with floating reeds and grass, so that the water is green.

In July, the Nile River entered the flood period, and the Blue Nile, which accounts for 4 7 of the flow, increased in water at this time, and a lot of sediment made the Nile a reddish-brown color, and the river was the reddest in September. By November, the water level has dropped and the Nile is crystal clear again.

The life and cultivation of the people on both sides of the Nile have a lot to do with the discoloration of the Nile. When people saw the change in the color of the water, they immediately knew the movement of the river and quickly moved away from the flood or sowed grain for farming. The discoloration of the Nile River makes the land on both sides of the river a treasure land of abundance.

The content comes from the title of the work: Dream of Red Mansions The alias of the work: Stone Records, Love Monk Records, Fengyue Baojian, Jinling Twelve Hairpins, Jin Yuyuan Creation Year: Qing Dynasty Literary Genre** Author: Cao Xueqin, etc. (controversial) Theme: Human Feelings** First edition time: 56th year of Qianlong (1791) Word count: about 960,000 (120 times of Cheng Gaoben).

The reason why the Nile floods regularly is because of the seasonal rainstorms on the Ethiopian plateau. Whenever a rainstorm comes, the Blue Nile, one of the sources of the Nile, crosses Lake Tana and then plummets downwards to form a stream of water that floods the Nile.

The Nile is characterized by regular flooding:

In northern Sudan, water usually rises in May, reaches its highest level in August, and then gradually decreases to low levels from January to May. Although flooding occurs regularly, the amount of water and the timing of high tides vary greatly. The reason for this phenomenon is the Blue Nile and Atbara rivers, which are fed by seasonal rainstorms in the Ethiopian highlands.

More than 80% of the Nile's water is supplied by the Ethiopian highlands, with the rest coming from the East African highland lakes. When the flood comes, Qiaofan Ridge will flood the farmland on both banks, and when the flood water recedes, it will leave a thick layer of silt, forming fertile soil. Four or five thousand years ago, the Egyptians knew how to grasp the laws of the flood and use the fertile land on both sides.

For a long time, the Nile River Xiaoyu Valley has been a continuous cotton field and a fragrant rice flower. Sandwiched between the Sahara Desert and the Alla Sedan Piper Desert, the meandering Nile River is like a green walkway, full of infinite vitality.