Hydroelectric power plants are installed near major rivers, lakes or artificial water reservoirs built high above the sea level or on sites suitable for the construction of dams.
The kinetic energy of the water flowing through the dam rotates the turbine, which is connected to the electric grid via the electricity-producing generator.
Water continues to flow in its own river bed.



High gradient, abundant streams and rivers are suitable to generate hydropower. However, these kind of rivers cannot be found in Hungary, therefore it is not really possible to construct any water power plant appropriate for energy production. Less powerful hydroelectric power stations have been built before, but their energy production does not reach even one percent of domestic production.
In Hungary, the establishment of new hydroelectric power plants is strictly limited by the protection of wetlands.

Advantages
  • It is a renewable form of energy, because water cycle is continuous. As long as there is enough available water, hydropower is suitable for continuous electricity production.
  • Reservoirs allow to adapt the electricity production, the amount and time of use to actual needs. The power output can be adjusted quickly.
  • The operating costs of a hydropower are relatively low, making electricity production inexpensive.
Disadvantages
  • Sites suitable for the establishing hydropower plants are available only in limited number.
  • The construction of hydroelectric power plants and dams on rivers is extremely expensive.
  • The construction of reservoirs generate significant changes in the ecosystem on large areas.


One of the world's largest hydroelectric power plants is the Three Gorges Dam located in China, which is two and a half kilometers wide and 185 meters high. It creates a lake on the river with a flooded area larger than Budapest. While dams provide continuous energy production, massive construction projects, however, take victims as well. Damming the river comes together with flooding extensive areas, where thousands of people are losing their homes, and hundreds of animal species disappear forever.




The water mill in Túristvándi is built on the bank of River Túr’s one branch, and it is one of the few mills still operating.

Approx. 2500 m3 rain water falls per year in the area of the Zoo, which amount is not led to the conduit but to the roots of trees standing in the Zoo.

The Rose of Jericho is a desert plant, which is able to live for long years without water even in hot dry sand dunes. The secret of the plant's amazing survivability is that on hot dry days it dries out as a small ball-shaped dry weed, then it sets sail with the wind, and wanders until water is found. After receiving water, the plant starts getting greener and taking roots in minutes.
When the moisture disappears, the plant dries out and starts to wander with the wind again, even through several kilometers.



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