Excessive sand mining in rivers can lead to:

Excessive sand mining in rivers can lead to:

• Bank erosion: When sand is removed from the riverbed, the riverbanks become unstable and can collapse. This can lead to flooding and damage to property.
• Saltwater intrusion: When sand is removed from the riverbed, the river becomes shallower. This can allow saltwater to intrude into the river, which can harm fish and other aquatic life.
• Reduced biodiversity: Sand mining can also lead to a loss of habitat for plants and animals. This can reduce the biodiversity of the river ecosystem.

In conclusion, excessive sand mining in rivers can have a number of negative consequences, including bank erosion, saltwater intrusion, and reduced biodiversity.