In the development of the class of natural-technical systems (NTS) “Natural Environment-Object of Activity-Population” (“NE-OA-P”) on the use of water resources in the multifaceted types of economic and other activities, giving the results of theoretical studies of a specialized type “NTS” in where the component “PS” means the natural water environment (NWE) of a water body as a source of the multi-purpose water supply system (MWS) of the objects of urban households, settlements, enterprises of the fuel and energy complex (TPP, HES, NPP); Under the “OA” water intake technological complex (WITC) is considered, which includes various for the functional purpose of hydraulic structures (HS) and devices for ensuring the selection of estimated water flow (Qm3/s) with an environmentally safe level of protection of the water environment of the water body in the zones of influence of the WITC and the functional work of the treatment facilities in the composition of the MWS; under the component "P is considered MWS that provides water of normative quality to specific water consumers and water users. The methodological basis in creation of new type NTS “NWE - WITC -MWS” considers the system analysis and the approach which is based on concept of “System”. The methodology for creating and developing this type is based on 4 axiomatic conditions: (1) existence as a fundamental characteristic; (2) a multitude of structural formations; (3) unity, as the relationship between natural technogenic components; (4) sufficiency of the initial material for an assessment of an ecological condition of water environment «NWE - WITC -MWS".

The paper studies the formation and use of water resources on existing irrigation and watering systems (IWS) of Stavropol territory in cause-effect relation with the global problems of Energy, Water and Food defining the tendency of modern development of agricultural production thus meting the vital food needs in social development. Both at the level of the global system “Nature-Society-Person” within terrestrial biosphere and at its hierarchical levels of river basin geosystems, where water resources are formed, agricultural production is carried out on existing IWS, on the example of the Kuban, Terek and Lower Don rivers and with the population of over 23 million people, the modern social development is characterized by a stable tendency towards water finiteness in limited conditions for further development. The analysis of formation of water resources within the spatial limits of basin geosystems and their subsequent use on IWS determines the technological scheme of water use on irrigated lands. The problems of Energy, Water and Food in agricultural production on irrigated lands, as it was established in the processes of their systemic interconnection, interaction and relationship on current IWS of the Great Stavropol Canal have identified the dominant problem, according to which there is a need to take into account the geomorphological characteristics of the earth’s surface topography, geological zoning of the Stavropol territory, development of the methodology to improve energy efficiency of water resources using both non-renewable and renewable sources of energy in accordance with system principles: “system integrity”, “reflection of objective reality”, “ecological suitability”, “vital purposeful activity”. Seven conceptual statements of Ecological Suitability contributing to new ideas for the creation of new and improvement of existing IWS were developed within the concept of “ecological suitability” for IWS operating within NTS “NE – IWS – P” based on basic system principles.

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Based on the results of monitoring studies of existing and under construction water management facilities within the basin geosystems of the Kuban, Lower Don and Terek river, using a systematic approachof developing methodological framework for assessing environmental safety in space and time on the model of the system “OP-SES-PM”, in which the vector properties are determined by the structure of this system. Taking the water management facility as a source of environmental safety, the concept of environmental safety is defined. Which is interconnected with the ecological state of the water managementfacility, considered as an “object of activity, as part of the environmental-technical system” “Natural environment-Object of activity-Population”. Based on the analysis of the processes of interaction between the components of the system “OP-SESPM” conceptual statements ofenvironmental safety have been formulated