Groundwater depletion

Karami E (2001) Extension, poverty and sustainability myths and realities. In 15th European Seminar on Extension and Education. Wageningen, The Netherlands, pp 59-61 Karami E, Hayati D (2005) Rural poverty and sustainability the case of groundwater depletion in Iran. Asian J Water Environ Pollut 2(2) 51—61... 

Electrochemical process Relies on proven technology Low 19,500 By far the most effective technique for removing Cr(VI) from groundwater depletes Cr(VI) content of gronnd water to EPA compatible level. 

In some surface waters (and shallow groundwaters) depleted in dissolved oxygen because of their organic-matter content, there is an inverse correlation between the O2 consumed by aerobic decay and respiration and the increase in CO2 found in the water over its equilibrium atmospheric value. This would be expected if changes in the dissolved oxygen and carbon dioxide contents of the water are controlled chiefly by respiration and aerobic decay (reaction 2 ). The ratio of the CO2 produced to the O2 consumed is called the respiratory coefficient, or,... 

Bouwer H. 1977. Land subsidence and cracking due to groundwater depletion. Ground Water 15 358-364. 

Nonreplenishable (fossil) groundwater can be tapped, but such extraction depletes reserves in much the same way as extractions from oil wells do. The terrestrial renewable freshwater supply, RFITTj, equals precipitation on land, which then subdivides into two major segments evapotranspiration from the land, and mnoff to the sea, T. Because groundwater and surface water are often hydrauhcaHy coimected, soil infiltration and groundwater... 

Since Ra and " Ra are both produced by recoil from the host mineral, it might be assumed that the production rates are equal. However, the relative recoil rates can be adjusted by considering that the parent nuclides near the mineral surface may not be in secular equilibrium due to ejection losses i.e., the activity of Th may be lower than that of Th due to recoil into groundwater of the intermediate nuclide Ra. Krisnaswami et al. (1982) calculated that the recoil rate of " Ra is 70% that of Ra if radionuclides are depleted along the decay chain in this way. 

In the previous chapter (Section 20.3), we showed the equation describing transport of a non-reacting solute in flowing groundwater (Eqn. 20.24) arises from the divergence principle and the transport laws. By this equation, the time rate of change in the dissolved concentration of a chemical component at any point in the domain depends on the net rate the component accumulates or is depleted by transport. The net rate is the rate the component moves into a control volume, less the rate it moves out. 

As groundwater flows along the aquifer, its sulfate content is gradually depleted by the sulfate reducers. The acetate added to the aquifer is not consumed completely by the microbes, so acetate concentration gradually rises, as required by Equation 33.15. About 100 km along the flow, acetate concentration rises to the... 

This causes sulfate and bicarbonate depletion in deep groundwaters around mineralisation. 

A reduced chimney is visible in the peat groundwater over both the Yankee and Zulu kimberlites, where elevated ORP responses correspond with low to non-detectable DO (Fig. 2). The reduced chimney model was first described by (Hamilton et al. 2004a, b). Elevated ORP and depletion of DO are due to the consumption of oxygen by ascending reduced ions from the kimberlite. 

Figure 4.15a are LNAPL obtained from two adjacent sites with different histories, and representative unaltered regular unleaded and premium unleaded gasoline samples. High BTEX hydrocarbon concentrations in LNAPL and groundwater are often indicative of gasoline presence. A noticeable depletion in benzene and toluene is evident in the LNAPL samples as compared with unaltered dispensed gasoline,... 

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