Groundwater

Earth's surface are ground water. Water, these are unstable, they are abundantly moisten the soil in the rainy season and almost disappear in times of drought. If rains a lot, the water from the upper layer begins to seep deeper, before meeting with the first waterproof layer. This layer is usually formed from clay. Water begins to trickle out over this layer, along the plane of inclination. This is a layer of groundwater. Groundwater and soil water moisture nourish their plants, erode, dissolve and carry, lay and pereotkladyvayut substances that make up the crust. Where a lot of precipitation falls as the water evaporates a bit, it seeps deep into the soil and feeds the groundwater. With the onset of summer the water level in rivers is reduced. The level of groundwater is above the level of groundwater. Therefore, in the dry season ground water seeping into watercourses, return them to their "duty" and protect from shoaling. Groundwater dissolved substances that make up the crust. The longer the water is underground and the deeper it runs out there, the more salts contained in it. Every 100 meters deep into the earth's crust the temperature of rocks found there is growing by about 3 degrees Celsius. This is because the depth is closer to the cinders of the magma. In Italy, the province of Tuscany, on the hot underground water works plant. On the island of Iceland most of the houses, and sometimes the sidewalks are heated by the hot underground springs. New Zealand has built several underground stations. These stations operate on the water of hot springs. In some places, mineralized groundwater themselves come to the surface. Often the water in these springs has medicinal properties. Such sources are called minerals. Water from these sources is used to treat people. In areas of high volcanic activity are not uncommon gushers hot springs. They are not all the time, but periodically. Such sources are called geysers. In permafrost regions, too, have underground water. Here, at a certain depth from the surface of the earth there are whole frozen small lake. Water finds its place everywhere - in basalt and granite, and limestone and gypsum deposits, it paves the road itself.