water pollution tania salionyk 9-v

Water pollution

As a result of intensive use of water resources by mankind, significant changes in the hydrosphere. This led to what is now the Earth has almost no major river systems of the hydrological regime and chemical composition of water, not corrupted by human activity.

Types of water pollutionChemicalPhysicalThermal pollutionBiological

Chemical pollutionChemical pollution is due to water inflow into

reservoirs of various wastewater contaminants. Most of them are toxic to the inhabitants of reservoirs. This - arsenic, lead, mercury, copper, cadmium, chromium and others.

Very dangerous source for water is mineral oil. Oil - enemy number one in modern pollution of the seas and oceans.

Oil film on the surface of the ocean - is not only distorted banks, dying marine life, birds waterfowls. This - reducing the amount of oxygen in the atmosphere as a result of pollution and destruction of plankton.

Physical pollutionPhysical water pollution associated with the

insoluble impurities radioactive substances.Sand, silt, clay particles fall into the water,

mainly due to surface run-off rain water from the fields.

Water pollution household waste."Garbage Island" is a huge pile of floating

debris - in fact most of the planet dump strip stretching from the coast of California through the northern part of the Pacific Ocean and nearly reaches distant Japan.

Thermal pollutionThermal water pollution caused by discharge

into water bodies warm waters of different power plants. Rivers, located near thermal and nuclear power plants violated terms of spawning fish dies zooplankton, fish diseases and parasites are affected.

Biological contaminationBiological water pollution is

injected into water with sewage various types of microorganisms, plants and animals (viruses, bacteria, fungi, worms), which previously was not there.