Tide has many effects on human life. The impact of tide discuss below-
Positive Impact of Tide:
- Shipping: Tides are helpful in making rivers navigable for large vessels. During the high tide, the amount of river water & height of river water increases. At that time, large vessels/ships can easily come to rive port. Again, during the low tide, ships can be returned from port to sea.
For example- London & Kolkata have become important ports because of the tidal waves in the Thames & the Hooghly rivers respectively.
- Pollution-free Environment: When tidal water flows, rivers are free of garbage. As a result, the environment is not pollutant near the river areas.
- Obstruction of Sediments deposited & Delta Formation: As a result of the tide, sediments not to deposited & prevents delta formation.
For example- In the Sundarbans, small creeks are capable of navigating during tides.
- Regular Water flow: During the tide, sea salt water enters the rivers, as a result river & port are often free of ice & help maintain regular flow of water.
For example- Riverside of British Island is free of snow even in winter.
- Electric Power Generation: The tidal force may also be used as a source for generating electricity.
For example- France & Japan have power stations which convert tidal energy into electricity.
Negative Impact of Tide:
i. Salt Increase: When a large amount of water enters the river during the tide, the fresh water becomes saline. As a result, water can not be used for irrigation in agriculture & industry.
ii. Fatalities: Small ships, lodge, boats sometimes sink as heavy rains come into the river & even fatalities happen.
iii. Damage to the Coast: High tide leads to coastal damage.
iv. Sediments Deposited: Many times, when the river water flow is low then sediments deposited in the rivers.
v. Flooding: When the intensity of tide increases, then coastal area is flooded.
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