the Hydrogeologie (of Greek hydros water, geo earth and logos (teachings)) the science of the water is in the earth's crust, whereby reciprocal effects with aboveground influences exist. It is an applied discipline of the geological sciences. Research articles are the groundwater and all factors, the influencehave on the groundwater. The hydrology as adjacent research range is concerned with that aboveground water (see also water circulation).
Unterdisziplinen of the Hydrogeologie are
- geo hydraulics, which investigates the movement of the groundwater in the underground
- hydraulic chemistry (hydraulic geochemistry), the teachings over chemical composition of the water
substantial one Tasks of the Hydrogeologie are:
- Investigation of potential groundwater supplies
- security of groundwater supplies in qualitative and quantitative regard
- determination of the ground-water formation
- groundwater management e.g. by classification and monitoring of drinking water protected areas
- reorganization of groundwater contamination
- modelling of ground-water flow and transport in the groundwater
- hydraulicgeological consultation with building project (calculation of groundwater attitudes)
Basis of the Hydrogeologie is the knowledge of the structure of the underground. Basis for it are geological maps, results of drillings and three-dimensional models of the geological underground. Tools and methods for the investigation and monitoring (monitoring) of the groundwater are remote sensing (remote sensing), geophysical methods, drillings, groundwater measuring points, pumping tests, lab tests andwater-chemical analytics.
In the center of the hydraulicgeological interest the permeability factor ( k or key-field value) is located, which was introduced 1856 by Henry Darcy by empirical investigations. The key-field value serves the water permeability of a rock for the quantitative classification. From the key-field value leave themselves with help of other sizesfurther hydraulicgeologically important parameters derive: the Transmissivität (profile permeability), the spacer speed and transported quantities of water. For the determination of the water permeability various methods stand for order: Evaluation of particle size dis. curves, lab tests, pumping tests, tracer tests and numeric models.
The relevance from hydraulicgeological models rose in the last years enormously. By means ofnumeric groundwater models e.g. leave themselves. hydraulic measures or the effects of environmental damage first compute.
- Hölting, Bernward; Coldewey, William G.: Hydrogeologie - introduction to the general one and applied Hydrogeologie. 6. Edition. 348 sides, 144 s/w fig., 69 s/w Tab. Spectrum academic publishing house2005.ISBN 3-8274-1526-8