The relevance of the subject matter derives from the need to select the most effective technical solution at the stages of pre-design studies and design of irrigation systems when performing innovative projects. The purpose of this study is to develop a decision support system (DSS) that would serve as an analytical and advisory tool for conducting complex research at the stages of pre-project preparation and design of irrigation systems. The leading approach underlying the solution of the subject matter is the functional modelling methodology integration definition for function modelling (IDEFo). This article presents the architecture of the software product, which shows the main subsystems of the DSS and reflects their interrelations. The implementation of the DSS in the form of a software product based on the provisions of the recommendations will automate the process of selecting alternatives (analogues) for elements of irrigation systems in specific conditions and provide information support for decision-making at the stages of pre-design studies and design, and also increase quality control and improve efficiency of managerial decision-making by 10-15% and reduce the total cost of organizing pre-design studies and designing irrigation systems by 3-5%. K E Y W O R D S decision support system (DSS), design, database, base of models, land improvement Résumé La pertinence du sujet découle de la nécessité de sélectionner la solution technique la plus efficace aux stades des études de préconception et de conception des systèmes d'irrigation lors de la réalisation de projets innovants. Le but de cette étude est de développer un système d'aide à la décision (DSS) qui servirait d'outil d'analyse et de conseil pour mener des recherches complexes aux stades de la préparation d'avant-projet et de la conception des systèmes d'irrigation. La principale approche sous-jacente à la solution du sujet est la définition d'intégration de la méthodologie de modélisation fonctionnelle pour la * Développement d'un système d'aide à la décision aux stades d'études de préconception et de conception de systèmes d'irrigation basés sur la méthodologie de modélisation fonctionnelle IDEFo.

Purpose: increasing the efficiency of monitoring the land resources state and managing fertility using a geoinformation database in precision farming. Materials and Methods: the basis for filling the agricultural geoinformation database of Rostov region (SHGBD RO) was the archival data of various scientific and design institutes from 1976 to 2020. The soil reclamation surveys data (particle size distribution, agrochemical, physicochemical and water-physical indicators) were used, as well as materials of large-scale soil reclamation surveys carried out on the reconstructed irrigation systems and irrigation areas. Results: the developed system is intended to provide the Ministry of Agriculture of Russia and subordinate organizations with operational, relevant and reliable information on agricultural land and provide agricultural producers with reliable information on the content of humus, phosphorus and potassium in various points of the agricultural field. The developed database provides collection, storage, replenishment, documents formation, processing and presentation analytical information used in decision-making in the field of state monitoring to users and directly by agricultural producers. Conclusions: SHGBD RO proposed by the authors for the implementation. will not only solve the problems of state lands monitoring, but also satisfy the needs of agricultural producers in the implementation of differentiated fertilization, which will make it possible to reduce the cost of fertilizers and subsequently increase the production profitability.

Purpose: to analyze the organizational aspects of the charge formation for the provision of services on supply (diversion) of water for agricultural producers and to develop proposals for improving the economic mechanism for calculating the cost of these services. Results: the adoption of the Order of the Ministry of Agriculture no. 79 dated 02.18.2013 significantly strengthened the position of institutions in the validity of the provision of services for water supply (diversion) on a paid basis, creating general conditions throughout the country, which made it possible to ensure uninterrupted water supply in the required volumes to water consumers. However, there are still many questions on this issue. As a result of the research, the priority role of the state in the restoration and stable functioning of the land reclamation complex of the country was determined. The problems associated with the underfunding of state reclamation systems operation and non-compliance with environmental legislation have been identified. Conclusions: proposals regarding the current procedure have been developed: the conclusion of two contracts if necessary (both for water supply and diversion) between the FGBU on land reclamation and the water consumer; the imposing of costs associated with penalties in case of exceeding the permissible discharge of pollutants on the agricultural producer in the contract for water diversion; the inclusion of costs for compensation of harm caused to aquatic biological resources as a result of activities for the water supply (withdrawal) resources in the costs of providing services for water supply (diversion); differentiation of formulas for calculating the cost of services for the supply (diversion) of water to agricultural producers on irrigated lands and other consumers not for the purposes of agricultural production. It is necessary to amend the charters of the Federal State Budgetary Institution on Land Reclamation, providing for the attribution of services for the supply (removal) of water to the main partially paid types of activities, and the establishment at the legislative level of the mandatory conclusion of contracts for the provision of services for the supply (removal) of water.

Purpose: analysis of the water bodies state monitoring system operating on the territory of Russia, identification of problems of accounting for diffuse pollution of water bodies in the framework of state monitoring of water bodies and development of proposals for its improvement. Materials and methods. Data from the Ministry of Natural Resources of Russia, Russian meteorological service, Federal Service of State Statistics, research by Russian scientists on this theme, and Internet materials were used as materials for research. Methods of systemic complex study, comparison, generalization and analysis of data were used. Results. The unified system of state environmental monitoring (state monitoring of environment), founded to ensure environmental protection in Russia, and the system of state monitoring of water bodies included in it, and its organizational aspects are analyzed. Problems that do not allow to assess the diffuse pollution of water bodies reliably, especially dangerous and significant in size in the zones of agricultural production, located mainly in the catchments of small rivers when conducting state monitoring of water bodies have been identified. Conclusions. The composition and structure of water bodies state monitoring data, which is currently operating, are mainly focused on monitoring water quality in the zone of industrial-urbanized territories, which are characterized by point (concentrated) types of pollution sources, and their intensity is relatively stable in time and space. The solution to the problem of identifying diffuse sources of water bodies pollution, assessing the degree of their impact on the quality of water resources and exercising control over them is represented in organization and conduct of special (additional) work during all typical hydrological seasons - flooding and high water, especially their upward branches, within the framework of water bodies state monitoring.

Purpose: determination and analysis of the relevance of the geographic information systems (GIS) use in assessing the degradation degree of agricultural land as a result of erosion processes. Discussion: the article is devoted to the problem of studying modern methods for assessing the state of agricultural lands subject to negative processes. Water and wind erosion (deflation) are the most widespread and harmful types of soil degradation. So, water erosion (19.32 % of the territory of the surveyed lands) is the most widespread on the agricultural lands of the Russian Federation. The main tool for identifying soil degradation processes is the monitoring system, and the most effective and promising method for assessing the degree of land degradation is the Earth remote sensing (ERS) method. All of the above, together with reclamation techniques (land reclamation, field-protective afforestation, etc.) is a means of preserving and improving the quality of agricultural land resources, including those prone to erosion and deflation. The main advantages and examples of detecting soil degradation using remote sensing data are presented. The analysis of information on the spread of negative processes on the lands of the Russian Federation is carried out. Based on the analysis of the current state of land erosion, it becomes urgently necessary to carry out a set of measures to stabilize and restore the fertility of agricultural land. Conclusions: objective and reliable data on the state of soil erosion can be obtained only by combining ground (agrochemical surveys) and remote sensing methods of the Earth. Since the assessment of the degree and territorial distribution of soil degradation types can be carried out with high reliability using aerospace photography materials and ground-based research data, it is necessary to use remote sensing methods of the Earth and geographic information systems more widely, in addition to field surveys.