The low-Thickness aeration zone in the loess soils of Rostov-on-Don is favorable for underflooding. Active civil engineering in the groundwater discharge zone generates a delayed geological risk of seepage and underflooding. To increase the reliability of hydrogeological forecasts, the materials of engineering and geological surveys have been analyzed and summarized, and a conceptual hydrogeological model of the near-river part of the Temernik River has been developed. The model describes the geological structure, boundary conditions of geofiltration, ranges of changes in soil filtration properties. To refine the hydrogeological parameters and reduce the uncertainty of the model, multivariate numerical modeling is planned.

Keywords: underflooding, geological risk, subsidence ground, modeling, conceptual model, hydrogeological conditions

To the Volgodon settlement-system has developed thematic maps of subsiding soils, indicating their capacity, groundwater levels, landslide and erosion hazards. Sources of information were the materials of the geological surveys, remote sensing of the Earth and local geological maps . Application of GIS-technologies and numerical geofiltration has significantly increased the quality of the results. On the basis of the results, has developed a comprehensive map of geological hazards.

Keywords: geological hazard, modeling, geofiltration, subsidence, landslides, erosion, underflooding, remote sensing