The knowledge of the geological and geotechnical characteristics of the subsoil is a basic step, fundamental to the development of any type of research, evaluation, study or project in the areas of Civil and Environmental Engineering. In this sense are asked, from information available on the Internet:
a) Define what come to be geophysical techniques and the relevance of such employment in identifying geological and geotechnical characteristics of a given field;
b) Present in a Table 1 is a summary of the physical concepts associated with the use of techniques based on electrical resistivity, seismic refraction and penetrating radar;
c) provide, on a Table 2, advantages and disadvantages (or limitations) of using the techniques mentioned in item (b) as regards the definition of soil profiles (including water level position - NA) and detection contamination plumes / solid waste buried.
d) Identify the sources of information presented at Work.