Karst water surface

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Karst water surface , also karst water level , is the surface of the phreatic zone , below which all rock cavities are filled with water.

A karst area consists of a soluble rock, such as B. Limestone . Existing fissures , cracks and joints allow water to move in the rock. With the widening of these gaps, karstification begins . Karst water systems react very quickly to precipitation, but also to dry periods.

In the case of karst water, in contrast to groundwater, there are often considerable differences in the water level between neighboring crevices and shafts, although one should assume that these would have to equalize according to the principle of communicating pipes . The reason for these differences is the behavior of flowing water in pipe systems with changing diameters. As the diameter widens, the flow rate slows, but the pressure increases. This means that the water is higher in further crevices leading to the surface of the ground than in narrower ones. The stronger the flow in a system, the greater these differences in water level.

The karst water area is therefore not a real area. It only shows the mean water level.

Individual evidence

Zepp (2004): Geomorphology. 3. Edition.