floods

Prykarpattia is one of the areas in Europe most prone to floods. Recent environmental research predicts a trend towards an increase in these dangerous phenomena in the Carpathian region of Ukraine. The analysis of the losses caused by floods in Lviv region shows that the allocation of funds for the elimination of the consequences of floods is growing every year. It is necessary to introduce comprehensive regulation of riverbeds, taking into account the development of channel processes and forecasting possible changes under the influence of hydraulic structures.

The diversity of landscape conditions in the territory of Ukraine is caused by the peculiarities of the geomorphological structure, zonal climatic, hydrogeological and seismic factors, which generally determines the area of distribution of exogenous geological processes (EGP). Most of these processes, namely landslides, karst formations, flooding and erosion of territories, mudflows are activated under natural conditions.

The linear dependence of some geological (significant) factors responsible for landslide and flooding processes on the cost of geotechnical surveys determining these factors was proved. The principle of selection of engineering-geological surveys, which assess the factors of occurrence of landslide and flooding with high probability, was developed. The possibility of identifying economic territories that may be susceptible to landslide and flooding processes based on already existing basic data of previously conducted engineering-geological surveys is substantiated.

In this paper the technique for monitoring the displacement channel of rivers in urban areas. Monitoring conducted by the example of the river Stryy within the city and nearby villages, covering a 30-year period – from 1979 to 2010. The main causes of riverbed displacement is described. The monitoring methodology is based on usage data from space imaging, cartographic materials, including special maps – the soil and geologic maps of quaternary sediments and, also engineering and surveying data.

In this paper we study the technique of channel displacement of the Dniester River. Monitoring of the rivers was done for the territory within the villages Tershev and Busovisko, and covers a 30-year period – from 1979 to 2010. The main causes of river bed displacement. We propose a conceptual model of the study of channel displacement, which is based on usage data from space imaging, aerial photography, laser scanning, cartographic materials, including special maps – the soil and geologic maps of quaternary sediments and, as well as data engineering and surveying..

The role of photogrammetric methods for creating spatial models of territories and objects exposed to emergency situations is analyzed, and examples of their application to assess the impact of floods and earthquakes are shown.