Vol. 37 No. 3 (202) (2003)

Based on the actual materials of exploration and exploitation of deposits of the marked industrial types the limiting errors of the average contents of metals at different stages of investigation are determined. The questions of correlation between the necessary degree of objects exploration and reserves of various categories are also considered. spatial time of desertification allocation, but also give forecast possibilities.

A flow rate of ground water streams is necessary to determine for water balance calculations, as well as for setting up the locations of prospecting boreholes. In case of lack of hydrogeological data for solving the definite problems in practice it is proposed to use both hydrodynamic and geophysical data based on correlation relationships. A number of examples of ground water streams discharges discovered at Sevan Lake basin territories has been discussed in the article.