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Marine Pollution

In: Other Topics

Submitted By josue2304
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Marine pollution resulting from all products released into the seas and oceans as a result of human activity. This pollution comes in the marine environment by the vector of water ways, winds, air at low altitude or is directly discharged into the sea.
 Generality on the main pollutants:

• Chemical pollution includes all minerals and organic wastes (fertilizers, detergents, hydrocarbons or phosphate)

• Thermal pollution leads to increased water temperatures by discharges from nuclear or thermal power.

• Organic pollution is the sole fact of sanitary sewage or organic waste industries (food, paper, etc.)

 State of the marine environmental situation

The human imprint is evident everywhere:

• The oceans and seas are relatively dirty

• Coastal areas are affected: habitats are being destroyed by urban development and tourism (mangroves, beaches, coral reefs, shoreline erosion)

 Scope of pollution worldwide.

• increased salinity in some rivers due to the discharge,

• Acidification of rain water due to industrial discharges,

• Dystrophisation water bodies (ponds, lakes, seas ...) and rivers.
 Impact:

• Overall deterioration in the quality and productivity of the marine environment

Several land-based activities contribute to release of contaminants into the marine environment:

• Via air emissions
• carried by streams, rivers, outfalls, industrial effluents, sewage, leach ate (leachate)

The majority of the contaminants remain in coastal waters, where water renewal is low (European estuaries, for example).

 Dispersion and diffusion of pollutants in the marine environment

Industrial activities can cause run off of pollutants that end up in the ocean. Currents and winds carry the pollutants over thousands of kilometers.

Here are some way by which pollutants travel through the seas and oceans:
• The general trends:…...

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