It's been established that the problem of disappearing of open water body and the use of Earth remote sensing data for their monitoring is relevant and poorly covered in current Ukrainian and foreign scientific studies. The necessity of complex solution method has been also determined. The purpose of this paper is to study the dynamics of surface water area over a 45-year period (over a long period of time) across the Iziaslav district of Khmelnytsky on the basis of programming analysis of satellite imagery and the results from field surveys at key research sites. In this study, the freely available QGIS software was used to process satellite imagery. Field surveys (implied on the ground) took place at water bodies which disappeared in