Reading Comprehension Set 27: The Nile Valley and Delta

The Nile Valley and Delta, known as the most expansive oasis on Earth, owe their existence to the Nile River, the world’s second-longest river. Without the geographical channel that allows the Nile to flow across the Sahara Desert, Egypt would consist entirely of arid land. The Nile River spans approximately 1,600 kilometers through Egypt, flowing northward from the Sudanese border to the Mediterranean Sea. This mighty river is a combination of three major tributaries: the White Nile, the Blue Nile, and the Atbarah River, all of which originate in central Africa.

The White Nile, beginning at Lake Victoria in Uganda, contributes about 28% of the Nile’s waters in Egypt. It descends significantly during its journey from Lake Victoria to Juba, located in southern Sudan, where its channel drops by more than 600 meters. However, as the river flows 1,600 kilometers from Juba to Sudan’s capital, Khartoum, it drops only 75 meters, meandering slowly through vast swamps covered with dense vegetation. In this region, the river slows almost to a standstill.

In contrast, the Blue Nile, originating from Lake Tana in Ethiopia, supplies an average of 58% of the Nile’s waters. It descends at a steeper gradient and flows more swiftly than the White Nile. At Khartoum, the two rivers converge, forming a striking visual contrast: the Blue Nile’s sediment-rich, muddy waters blend with the White Nile’s clearer flow. The Blue Nile’s heavier sediment load plays a crucial role in enriching the soils of Egypt, particularly in the Nile Delta.

The third tributary, the Atbarah River, contributes significantly to the Nile during the rainy season but dries up almost entirely for the rest of the year. Together, these rivers form a life-giving system that sustains millions of people and supports Egypt’s agricultural productivity.