Answer:
Step-by-step explanation:
An old river occurs at the plain course and it is at its lower stage.
Here:
- The river gradient is very gentle as it is on a plain.
- An old river would be at its depositional phase where all the sediments its carries are being laid down.
- It has a low velocity and a very sluggish flow.
- Lateral erosion is very active at this stage.
- The volume of the river increases substantially as more river tributaries joins.
- Some of the river features are flood plains, leeves, ox-bow lakes, delta e.tc.