ASSESSMENT OF THE CONDITION OF DRAINAGE SYSTEMS USING REMOTE SENSING METHODS

Abstract

The article analyzes the condition of drainage systems in the Upyna cadastral area of the Telšiai district using three methods: visual analysis, evaluation of orthophotographic images, and precise positioning technology—utilizing an RTK (Real-Time Kinematic Positioning) drone with a multispectral camera. The research methods were compared in terms of accuracy, time, and cost to determine their effectiveness in planning drainage system reconstruction. The results showed that visual analysis accurately identified waterlogged areas and collector outlets, while the analysis of orthophotographic images helped assess changes in waterlogged areas over time. The images obtained by the drone did not precisely reveal the locations of drainage systems or waterlogged areas but provided additional information on crop conditions and drought-affected areas. Optimal results can be achieved by combining all three research methods. Although remote studies require less time and expand the scope of research, they demand significant financial and technical resources as well as specialized knowledge.