Draw a sketch to show the shape of the long profile of a river.
1.1 On the sketch, label the source and the mouth.
1.2 At the correct stage of the river on the long profile, draw simple sketches
to show the transverse profiles in the upper, middle and lower courses of
the river
Unfortunately, I am not able to draw images as I am a text-based AI. However, I can describe the sketch to you.
The long profile of a river typically shows a curved shape, with higher elevation at the source (start) and lower elevation at the mouth (end) of the river. The source is usually located at a high elevation point, such as a mountain or hill, while the mouth is located at a lower elevation, often where the river meets an ocean or lake.
For the transverse profiles in the upper, middle, and lower courses of the river:
- In the upper course, the river is often narrow, with steep sides and a V-shaped valley.
- In the middle course, the river widens, with a wider, flatter valley and gentler slopes.
- In the lower course, the river is widest, with a broad, flat valley and very gentle slopes.
These different transverse profiles are a result of the processes of erosion and deposition that occur in different parts of the river's journey from the source to the mouth.