Scientific Journal of KubSAU

The aim of the research was to develop a geographical information system (GIS) for monitoring soil fertility based on calibrated remote sensing data within Rostov region. The possibility of developing a geoinformation system for irrigated agrolandscapes monitoring based on modern computer geoinformation technologies for problems solving of reclaimed territories management in cooperation with other automated information technologies is considered. An example of selecting main degradation processes for the irrigated agrolandscape within Rostov region boundaries, the main possibilities of the system and the proposed directions for its development are presented. To develop a geoinformation monitoring system, the ArcGIS 10.4.1 for Desktop software package has been selected. Monitoring GIS includes remote sensing data obtained from the VEGA-Science satellite monitoring service. The technology for creating a geodatabase for degradation processes monitoring, necessary for rapid analysis of information and time-saving on collection, processing and calibration of data bulk is introduced. As a mapping principle, graduation of farm fields by intensity of land degradation processes was used. GIS monitoring includes multi-layer digital maps and data attribute tables characterizing the main indicators of soil fertility and crop seeding development. The use of GIS technologies with satellite data will significantly reduce the complexity of field survey data processing by data processing automation and is promising for developing computer monitoring systems for irrigated agro landscapes. Farm specialists are offered a convenient mechanism not only for data accumulation, but also for maintaining fields’ history with reference to the yield year. Analysis tools allow performing data spatial and logical queries, to run samples and reports

The article contains an analytical overview of the causes of local washouts on hydraulic installations of Don highway networks. One of the major outlet structures of the main canal is the terminal resets in Sadkovskaya gully (Veselovsky reservoir 1115+79), with a maximum flow rate of 50 m3/sec, designed for irrigation and desalination of Veselovsky reservoir. To analyze the effect of the liquid on the bottom of the outlet structures we need to know the kinematic parameters of the liquid in the channel. Until now there are no universal correlations, which would allow calculating these parameters. The mathematical dependences allow analyzing the impact of water flow on the bottom of the spillway constructions of melioration canals. Modeling of local scour of channels is based on a thorough analysis of the causes of this phenomenon. The main ones are the kinematic parameters of the liquid, the speed and the propagation direction of fluid flow, structural features of the channel. The mathematical dependences allowed us to identify the following parameters that influence the degree of local scour at end spillway structures on melioration channels: the rate of flow, the degree of compression of the stream size, flow, shape, and movement of sediment, depth and shape of the supports in the plan and cross section, the shape of the hydrograph, the angle of the jet, duration of standing high water levels in Sadkovskaya balka, etc