ON THE ANALYSIS OF LANDSLIDE PROCESSES ON THE TERRITORY OF THE NATIONAL DENDROLOGICAL PARK "SOFIIVKA" WITH APPLICATION OF GIS-TECHNOLOGIES

Abstract

The possibilities of manifestation and intensity of landslide processes on the basis of instrumental researches of the relief of the National Arboretum "Sofiyivka" of the National Academy of Sciences of Ukraine are analyzed. It is noted that geodetic observations and measurements in the particular landslide areas was creation of a geodetic network, marking on the ground with special solid monuments and periodic re-measurements their 3-D coordinates, determining the boundaries and volumes of landslides, prediction landslides speed and direction of shift. The observation of landslides was carried out in several cycles according to the speed of the landslide phenomenon. Based on the materials of the topographic survey of the landslide slope, which was performed during the first cycle of observations, a digital terrain model was created on Surfer software package. The results of observations, cartographic materials were obtained and can be further used to develop appropriate anti-landslide measures. It is noted that the application of digital modeling of landslide processes allows to improve the definition of spatiotemporal characteristics of landslides. Also was emphasized that digital terrain modeling makes possible to obtain maximum information for complex solution of geodynamic problems on landslides. Such as, identification of landslides, establishing direction lines for the largest landslide movements, to choose types of protective measures and specify correspondent zones of possible landslides development. It is noted that geological studies of landslide areas allow to determine the sliding area and provides material for mapping the moving capacity of the landslide body in meters, moving rate in millimeters per month and slide directions. It is emphasized that the landslide model can be supplemented by hydrometeorological, hydrogeological and geophysical data. Also the overwetting of the soil due to precipitation leads to an increase in the weight of the landslide and influence of this factor must be taken into account. Since the above maps are created for each cycle of observations, comparing data from different cycles, we can analyze the dynamics of the landslide process, forecast of landslides development and design appropriate type of measures. If the implemented measures do not allow to reduce the slide rate, they are considered ineffective and we have to the develop other measures and procedures. On the contrary, the termination of the landslide process confirms the correctness of management decisions regarding the organization and conduct of landslide engineering works

Keywords

• landslide processes
• landslide body
• topographic survey
• digital relief model