DETERMINATION OF THE COASTAL RETREAT DYNAMICS OF THE ALAKOL LAKE USING A LASER SCANNER

Abstract

The purpose of this study is to follow the dynamics of erosion on the Alakol lake coasts using terrestrial laser scanner (TLS), which are leading to major changes of embossed medium, endanger the existing infrastructure and hinder the development of recreational coastal zone. The main steps in applying the ground-based laser scanning method are as follows: preparatory work for field-based radar systems; TLS data collection with laser scanner RIEGL VZ-4000; processing the received data in the RiSCAN PRO program; analysis of multi-temporal digital elevation models (DEM). Four monitoring sites were selected on the southwestern coast of the Alakol lake, where abrasion is actively developing. The described shooting method allows to calculate the volumes of the rates of shore erosion and coastline profiling. The systematic and long-term use of the TLS method in studying the reliefforming processes of the coast will contribute to solving problems associated with coastal erosion, in particular, reduce the negative impact of abrasion on natural coastal landscapes and infrastructure.