Vol. 41 No. 1 (212) (2007)

Modern approaches of ground water simulation, and also the description of constructed by authors of 3-D conceptual model of Shirak basin have been discussed in the article. The topographical map of investigated area in scale 1:100000, geological map in the same scale, and also the description of boreholes, drilled in the last 60 years. On constructed longitudinal and lateral cross-sections of the investigated area and by various interpolation methods the conceptual hydrostratigraphic model has been constructed. The feature of the model is flexibility to updating in the process of reception of new authentic actual materials of investigated area.

In this work are presented some new data about the geological structure of central part of one of the interesting and difficult structured tectonic units of Armenia – Yerevan-Vedi graben-synclinorium. For the first time are allocated and described the olistostrom horizons in the development field of paleocene sediments. Young ruptures are described, probably of seismogenic nature. Connection of modern geodynamics with geodynamic active structures of the geological past is considered.

The general order and financing sources of mineral resources' exploration, as well as methods of calculation of capital and operational expenses for the mining factory construction and reserves processing are considered in this article.

The work presents and analyses the distinctive features of restoration of the natural river runoff as well as their deficiencies. It suggests a new, mathematical statistical method of restoration of the natural river runoff, which differs from the traditional method of water intake summation by its reliability and higher accuracy.

The morphometric characteristics of relief are the most important factors influencing on the ecological conditions of the area. They influence on many natural and social processes and phenomena having some ecomorphological characteristics. Relief morphometric indices evaluation and mapping was realized in Shirak region for discovering the above-mentioned features.

In mountainous countries the nature and intensity of most eczogenic geologic processes are determined by many morphometric parameters. Indeed, this state causes the need of morphometric research work in the basin of Lake Sevan. It is a well-known fact that down gradient of the relief influences on the intensity of eczogenic and erosion processes. Rise in down gradient causes activity of plane and linear erosion. The analysis of morphometric and geomorphologic materials showed that the greatest slopes don't have shady ones, but the lighter slopes having intensive folding and activation of eczogenic processes. The tendency of rise in weighted flow is related to the slope increase of mountain rocks as well as anthropogenic load on the landscape. The current ecological state of the Sevan basin requires monitoring and development of protection and improvement strategy of environment.