Education, Secondary education and schools
Ecological situation, or How people influence the river
At present, mankind does not imagine a life without industry. In every state that is on planet Earth, there are many factories, factories and other enterprises. They, of course, bring huge revenues, but, unfortunately, cause irreparable damage to the environment.
The technological sphere every day more and more affects the life of the planet, especially its water resources. We are used to the fact that the water flows continuously from the tap, absolutely do not know how it is - to experience a defect in it. And once, in ancient times, such rivers as the Ganges, the Nile, the Volga, the Dnieper, were considered sacred. Many believed in the healing powers of water. People were sure that it was enough to drink only a sip - and all the diseases would recede. It is not for nothing that such an important rite in a person's life, like baptism, is also taking place in the water.
All settlements have a central water supply, which is provided by rivers. Underestimate their value is not worth it. After all, water is the most important element for all life on the planet. And how many people are asking how people influence the river, whose resources are used in full? Let's try to answer it.
Human interference in nature
Since ancient times, scientists around the world have been studying the water system of our planet, trying to make the most of its resources for the development of civilizations. Pay attention, almost all cities are built near natural reservoirs. And this can be called a kind of intervention. People refer to water as an inexhaustible resource, but it is not. The consequences of irresponsible actions can be catastrophic. The canals, which used to allow ancient civilizations to blossom, eventually led to their deaths. Soils became infertile due to salts that could not flow into the sea with streams of river water. The earth turned into deserts or swamps. That is why the fate of not only a certain piece of land but the entire planet will depend on how people influence the river .
Problems
Today, the influence of man's economic activity is felt more. Chemical fertilizers are washed off agricultural land , and wastewater is not sufficiently cleaned. Great damage is caused by thermal stations. They heat water, which leads to intensive development of plankton and an increase in the color of the water. It has a smell and smack, the microflora is changing, which leads to a gradual overgrowth of the channel. Observing the deterioration of the health of the water and the way people influence the river, scientists are developing special projects in order to restore the ecosystem.
How does the hydropower plant affect the river?
Hydroelectric power plants are of great benefit to humanity, but their construction has a catastrophic effect on the overall state of the rivers. Consequences of erection of hydroelectric power stations are flooding of territories, construction of dams, damage to fishing. For example, during the construction of a similar station, more than 2 million hectares of fertile land was flooded in the USSR, and this accounted for about 6% of the total area of land suitable for agriculture. All hydro power plants have a detrimental effect on the animal world of water bodies. The flood, which should occur in the spring, comes already at the end of winter. The fish is washed out of its pits, the terms of ripening of the caviar are violated, which significantly reduces the population of certain species. After this, the question arises: "How long will such influence of people on the river be?". Is it not obvious that the dams create insurmountable obstacles to the migration of fish that go to spawn? Water in the reservoirs is stagnant, because its flow is slowed. The rise in temperature causes flooding and landslides. Also, the change in natural conditions has a big impact on groundwater.
The danger from enterprises
Rivers are particularly harmed by large enterprises. They throw in them dangerous substances that poison all living things. This problem has been raised by many scientists around the world for a long time, but it is not yet possible to transfer production to an environmentally safe one. Also it is worth paying attention to the fact that during the operation of the enterprise, large quantities of fuel are burned. For example, the use of coal leads to the formation of oxides of sulfur and nitrogen, which together with the rains fall into the water.
Responsibility of each of us
How do people influence the river? Each of us should ask this question. Many will be surprised and will ask why. But it's easy to explain. Ordinary people often inflict irreparable harm on the river, in principle, the same as enterprises. They rest during the rest of the garbage, which then pollutes the pond and kills its inhabitants. Also, the river is contaminated with phosphates, which are used in detergents. They fall into it with sewage. Algae under their influence start to grow much faster. When they die, they decompose in water and absorb oxygen. Its shortage leads to the death of river inhabitants. As can be seen from this information, the state of the rivers depends on each of us.
Let's sum up the results
The pollution of rivers has reached a truly enormous scale. Their ecosystem is a fragile mechanism, and interference in its work leads to sad consequences. So let's take care of the purity of water, since without it no living organism can exist on the planet.
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