That one part that is up there.!!!
The yalu river forms part of the boundary between China and North korea
through the upper and lower part of the river Nile
Since the Nile River flows upward, Egypt is practically upside down. As a result, the ruling Pharaohs preferred the upper or Northern part of the river and country. This part of the country was crucial to their respective kingdoms and trade routes.
The Louisiana Purchase expanded the southern part of the United States. It included many future states, but did not include the upper part of the Mississippi River.
The region of Northern Egypt is termed Lower Egypt because it is further downstream on the Nile River. Conversely, the region of Southern Egypt is termed Upper Egypt because it is further upstream on the Nile River. The Nile River flows from south to north.
The upper course and the middle course of the Yellow River. Not including Tibet and Xinjiang Province while their rival--the Kuomintang ruled the area of the northeast, the south of Yangtze River and the lower reaches of Yellow River, including the next capital--Peking.
Usually it is the upper reaches (often termed as mountain streams) that flow the fastest. In the lower, flatter valleys, rivers tend to slow down (except in spate, when the river is in flood)).
Which river?
Lake Nasser is in Upper Egypt which is the southern part of Egypt. The terms Upper and Lower Egypt date back to the ancient kingdoms. Upper refers to the upper reaches of the Nile River in the southern, higher elevations of Africa. Lower refers to the lower levels of the river around the Nile Delta in the north, where Cairo is located.
upper
The yalu river forms part of the boundary between China and North korea
South China.
The amur river
Huang He River is in China. This is part of Asia.
The Upper Nile is the southernmost part of the river, in southern Egypt and the Sudan.
The Mississippi River's upper reaches were sighted by French-Canadian explorer Louis Jolliet and French Jesuit missionary Jacques Marquette in 1673. They traveled downriver by canoe to a point near the mouth of the Arkansas River.
Jesus was baptised in the River Jordan. (Which today marks the border between Israel and (Trans)Jordan)