Artieda 2011

In many places on earth there are ravines. But not everywhere identical kovo quickly they grow and are equally dangerous. Why is formed gullies? Let's trace the drops of rain falling on the ground. On the road we climb to the mountain. Went warm rain. His rare, large drops fall heavily on the soft earth.

Discharge. You will see the fovea, which leave behind a drop of rain. Suddenly the rain came harder, and the drop is not absorbed, but drain tiny streams. On their way to get up the stem ki thick grass. They divide the streams into parts, do not allow them to merge into larger streams. Even a heavy downpour was powerless to destroy the soil surface in places thick grass. And now we find the slope a place where there is green grass and right at the surface is loose rock. Here raindrops deepened, made hollow – gully.

Each subsequent rain deepened and lengthened it gully Gradually gully stretches across the entire slope. Now it gully can not be called – there was a ravine. Gradually it became longer and deeper. And gullies are formed as a result of flowing water. Formation of gullies in the old days helped the man himself. The land was divided into small plots. The owners of plots dug on all sides by deep ditches to secede from neighboring areas. And of those that grew up gutters and gullies. Gullies often grew so fast that each year had to move from place to place bridges, new roads. And where there has recently bloomed and pleasing to the eye golden waves of grain, and where thousands of troublesome bees reaped over the Honeybees fields buckwheat and clover – dark empty ravines of the earth. Ravines and sneak to the cities, crossed the street, destroying the house. And there was, it seemed such a force that could stop the impending disaster. Ravines destroyed roads and brought harm to the fields. In places where a lot of ravines, underground water sunk so deep that the roots of plants can not reach the water. Often, dry wells, and people begin to suffer from water scarcity. Here's how ills brought along ravines! Currently, with ravines struggles. The resulting scour buried. On the slopes of ravines plant fast growing trees and shrubs, sow grass. The roots of the land they hold together and not let her destroyed, washed away by rain waters. On small slopes of plowing land and processing of crops should not be carried out along and across the slope to a refrain runoff. Each drop should be absorbed into the soil where it fell. K measures to combat the ravines are growing over all the slopes along the rivers, snow retention in the fields, sand fixation.