For example, one does not say I was very tired yesterday, due to not having slept well last night: last night in that sentence refers to the night before the speaker is speaking, not the night before the "yesterday" to which he refers.
The long profile of a river is a way of displaying the channel slope (gradient) of a river along its entire length. Therefore, it illustrates how a river loses height with increasing distance from the source towards the sea.
River profiles - cross profiles and long profiles Long profile A long profile shows how the river changes over its course from its source (where it starts) to its mouth (where it meets...
Long profile: The long profile of a river is the elevation profile of the river from its source to its mouth, which shows the changes in elevation over the length of the river.
The long profile of a river made SIMPLE - The geography teacher
The long profile of a river shows changes in the height (altitude) of the course of a river from its source to its mouth. A long profile is usually concave and the slope becomes more gentle towards the mouth of the river.
The long profile of a river marks its change in gradient and altitude from its source to its mouth. It shows how a river changes throughout its course. Long profiles are concave in shape and depict how a river’s slope becomes gentler as it nears the sea.
The long profile of a river is a way of displaying the channel slope of a river along its entire course. Therefore, it shows how a river loses height with increasing distance towards the sea. The diagram above shows how the long profile changes downstream.