Hydro-geology

Definition of hydro-geological conditions by means of complementary site investigations and measurements of loads and temperatures, etc on the user side. 

Goodwin, M. J. and Gillham, R. W., 1982, Two Devices for in Situ Measurements of Geotechnical Retardation Factors In Proceedings of the Second International Hydro-geological Conference (edited by G. Ozoray), International Association of Hydrogeologists, Canadian National Chapter, pp. 91-98. 

A number of general and site-specific considerations must be made in devising a rational, cost-effective aquifer restoration program tailored to the site s unique hydro geologic setting. ... 

When selecting a site for an injection well, it is crucial to understand the hydro-geological conditions to ensure any existing or potential fresh water supplies do not become contaminated. Potable aquifers are more likely to be found at shallower depths, while deep aquifers are more likely to be lower in quality and are less likely to be used as a water source (Mickley 2006). Siting injection wells away from areas known to by seismically active also helps to reduce the possibility of contaminating aquifers. The use of injection wells should also be avoided near recoverable resources like ores, coal, oil and gas (Mickley 2006). The selected receiving aquifer must be able to contain the volume of concentrate for the expected life of the plant (Chelme-Ayala et al. 2009). 

The movement of groundwaters within crystalline environments and the numerous hydro-geologic parameters associated with these environments should have multiple controls. As discussed above, fracture generation and fracture sealing by secondary mineral phases could be a multi-phased process in the life of a crystalline... 

FAULTS POROUS ROCKS IMPERMEAB UYERS SOURCE ROCK HYDRO- GEOLOGY FISSRES... 

The bathtub effect occurs, in part, because most wastes have much higher hydraulic conductivities than the natural material into which they are placed they may also have very different unsaturated soil—moisture characteristics. The hydraulic conductivity of some wastes can be reduced by compaction. The bathtub effect also occurs because more infiltration enters the disposal excavation than would under normal undisturbed conditions. Trench covers may be constructed to achieve the desired hydraulic conductivity and to limit infiltration for the required period of containment or until compaction of the wastes occurs however, it is difficult to maintain the trench covers. The covers must withstand attack by plants, weather (freeze—thaw, wet—dry), erosion, and strains caused by consolidation within the trench. Most trench covers are not capable of meeting these demanding requirements without costly long-term maintenance programs. The cover should be designed to allow for expected consolidation and to utilize hydro-geological concepts of saturated and unsaturated flow systems present at the site. 

Local hydro-geological conditions were considered for each zone where the radionuclides transport occurs, namely for the contaminated zone, for the unsaturated zone and for the saturated zone, using different densities, porosities, hydraulic conductivities, radionuclide distribution coefficients and thicknesses. The well is located at the down-gradient edge of the contamination source. 

Sample, J., and Reid, M.R., 1998, Contrasting hydro-geological regimes along strike-slip and thrust faults in the Oregon convergent margin Evidence from the chemistry of syntectonic carbonate cements and veins GSA Bulletin, 110 48-59. 

Hydro- geological Given the through going fault, it is possible that D1 -i- D2 are one domain, and D3 -i- D4 are a different domain. 

Obviously these marginal costs of the additional use of pesticides will depend upon the extent to which the pesticides accumulate in drinking water. As we have just indicated, the property of accumulation is dependent not only upon the type of compound used and the amount applied, but also upon local and hydrogeological conditions. The marginal costs of the use of some pesticides might therefore be relatively low in some regions where the accumulation risk is low as a consequence of the specific hydro-geological condition. 

Advective mixingis a consequence of water filtration. In the Russian hydro-geological literature this mixing as a rule is called convective. However, this term was introduced by physicists for heat transfer within one medium. In Western literature, convection is understood as the motion of molecules within one medium. And transfer of the matter by a solvent is called advec-tion, i.e., advective flux. 

As well as being the basis of many fundamental biochemical and hydro-geologic processes, solvents in industry fulfil the following functions ... 

Hydro-geological conditions for coal mines in China are complicate with severe water hazards. Coal mine water hazard, the second disaster, second only to gas explosion accident, ranks the first when counting the economic losses comparing with other disasters. 

Information on the local investigations on geology and hydro-geology Nature of the sampling points... 

Ground water or water processes in hydro-geological context with gas resources ... 

---