Question

Factors affecting the work of rivers are?
A) Velocity of river
B) Volume of water
C) Load
D) All of these

Answer 1

Hint: A river is a natural flowing freshwater or watercourse, flowing towards a lake, ocean, sea, or another river. Different factors affect the transportation, deposition, and erosion work of a river.

Complete answer:
According to Geology, the work of a river is when the water flowing from head to mouth the river streams greatly modify the topography of a region through which they are flowing. That is, the running water in the river erodes the landscape.
These are of three types:
1. Erosion: The energy in the river causes erosion. The banks and beds can be eroded making it deeper, wider, and longer.
 2. Transportation: Transportation of materials in the river begins when friction is overcome. Materials that have been loosened by the erosion then transported along the river.
3. Deposition: It is a process of eroded material being dropped. Deposition happens when the river loses energy.
Important factors that affect river work include the following:
1. Velocity of water: Transportation and erosion are both maxima when the river velocity is high. On the other hand, deposition takes place when the velocity of the river is low.
2. Volume of water: The power of Transportation and erosion is greater when the volume of water is larger. On the other hand, deposition takes place better when there is reduced water volume as well as when the load is much greater.
 3. Load: The material transported by a river is known as the load. A load of a river does all the work of deposition and erosion. Deepening of river valleys, mass wasting, and formation of landforms depend on the load the river carries.
So, the correct answer is Option D.

Note: There are many factors that are harmful to rivers. Those factors are Pollution, Overuse, Wastage and Less Rain, etc.