What is siltation ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Siltation**: Siltation is a process that occurs when fine mineral particles, such as silt or clay, are suspended in water. This leads to the water becoming dirty or polluted.

2. **Understanding the Cause**: Siltation is primarily caused by the accumulation of terrestrial materials, which are particles that originate from land. These materials can enter water bodies through various means, such as erosion, runoff, or human activities.

3. **Types of Siltation**: There are two main aspects of siltation:
- **Increased Concentration of Suspended Sediments**: This refers to the higher amount of silt or clay particles that are floating in the water.
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