There are examined general issues of creation and usage of water reservoirs and connected environmental risks. Special attention is given to possibilities of geoinformation techniques application for simulation of different scenarios of area impoundment in the process of water reservoir construction, or under dam failure. Procedure of simulation is based on usage of landscape digital models, created by means of high resolution’s satellite data. There is touched on an issue of decision-making on the base of information obtained by means of analysis.

The construction and operation of industrial objects of oil and gas branch cause negative influence on environment. It could be minimized under condition of a well-organized system of ecological monitoring and acceptances of corresponding preventive works. In a view of optimization and also for increase of efficiency of ecological monitoring there are necessary the well-founded choice of points of prospective works. Thus it is necessary to consider set of natural and organizational factors and also features of technological process of construction and operation of objects. In given article consider the method of designing for a network of ecological monitoring for territories of objects of oil and gas branch on the basis of cartographical modeling.