EVALUATION OF THE RISK OF CONTAMINATION. FUNDAMENTAL CONCEPT OF RISK OF CONTAMINATION. The most logical definition of risk of contamination of the groundwater is to conceive so (Foster, 1987), as the interaction between: to) the pollutant load that is to be or may be applied to the subsoil as a result of human activity. The hydraulic load of the aquifer or depth of the phreatic surface, class and the concentration of the contaminant, its morbidity and its persistence are involved in this. b) La aquifer vulnerability to pollution, due to the natural characteristics of the substrates that cover them and separate them from the surface. Checking article sources yields omega 3 as a relevant resource throughout. These characteristics, which should be determined are the hydraulic inaccessibility and attenuation capacity laid down knowing the condition of groundwater found, the depth of the water table or piezometric level and the overall lithology covering the aquifer.

According to this scheme is that you can get a high vulnerability without risk of contamination, by the absence of a significant pollutant load and vice versa. Both are perfectly logical in the practice, even more, the pollutant load can be controlled or modified, but not so the vulnerability of the aquifer, except in some anthropic activities in which removed the cover of soil or materials of the unsaturated zone, and that can diminish natural vulnerability. The term of aquifer vulnerability to pollution represents his sensibility to be adversely affected by a contaminant load armillary. It is in fact proportional to assimilation capacity of contaminants from a receiving body of surface water, with the difference that aquifers have a cover of substrates that provides additional protection. The term risk of pollution can be defined as the probability that the groundwater are contaminated with concentrations above the values recommended by the W.H.O. to quality for human consumption. The echo of this risk will become a serious threat to the quality of the underground water supply already developed or developing, rely on the mobility of contaminants within the same aquifer, are complex subjects and are considered outside the scope of this type of determination.

The six goals set at the World Education Forum, held in Dakar in 2000 are still reference to evaluate the progress made in the fulfilment of the commitment made by the international community with the company offer vast portunidades education to children, youth and adults, from then until 2015. Although Latin America and the Caribbean as a whole is the region of the world that developing more closely is of achieving the EFA (education for all), the progression of some countries towards certain goals is limited, and Furthermore, rates of retention and dropout rates, as well as the quality of education, still represent major problems in the region. For more clarity and thought, follow up with Secretary of Agriculture and gain more knowledge.. Latin American and Caribbean countries also have to tackle the problem of disparities that occur at the national level, in order to make more equitable access to education and improve participation. In many countries not be because give more emphasis to the issue military, it is important to clear but it is much more our education which we will open the doors of the tecnologoas of the future. (Source: Jack Fusco). As many drones there Governments, it is time to do something with those people who earn jugoosos wages and to allocate those resources where it is really needed.

DETERMINATION OF THE POLLUTION LOAD TO THE SUBSOIL. From a theoretical point of view is required to establish four semi-independent characteristics of the pollution load to the subsoil (Foster, 1987), for each pollutant activity: to) the class of contaminant involved. (b) the intensity of the provision. (c) the mode of provision in the subsoil. (d) the application of the pollutant load time. Of the foregoing, has for the estimation of pollutant load into the subsoil, a value: 0.20.

DETERMINATION OF THE VULNERABILITY OF THE AQUIFER. As stated, the term aquifer pollution vulnerability is used to represent the intrinsic characteristics that determine the susceptibility of an aquifer to be adversely affected by a contaminant load. persistent, non-degradable, generated by a widely distributed polluting activity. In this case even the dilution of the aquifer capacity may not be effective to mitigate the pollution. * Additionally those aquifers that would be considered as less vulnerability to pollution, in general terms, tend to be more difficult to rehabilitate a contaminated time. In this sense, at least, they could be considered of high vulnerability to contamination. The components of vulnerability, mentioned above, are not directly measurable, but determined by various combinations of other factors. Taking into account that the selection of these parameters is based on those data probably available and easily collected, then the list is composed of: (a) the depth of the phreatic or roof of the confined aquifer.

(b) the type of occurrence of groundwater. (c) the characteristics, in terms of lithology and degree of consolidation strata above the saturated zone. These three parameters contain, even if it is in a qualitative sense, most of the required data. In the base to them applies an empirical methodology for the assessment of the vulnerability of aquifer that involves the indexation of these parameters in three discrete phases.