The authors present a correlation analysis of the impact of the Rwegura reservoir regime on dam deformation, based on integrated geodetic monitoring and piezometric data collected from 1992 to 2018. The objective is to establish quantitative relationships between reservoir water level fluctuations and deformation processes in different dam sections. The methodology involves analyzing data from four measuring profiles (P100, P140, P180, P200) located on the right -, left bank - and in the central part of the dam. Correlation analysis was used to identify relationships between reservoir water levels, piezometric readings, and horizontal displacements of structural elements. The results reveal a pronounced dependence of the dam deformation on the water level fluctuations, with an asymmetric response across the structure. The right bank profile (P100) exhibits the highest sensitivity to water level changes, with correlation coefficients ranging from 0,78 to 0,91, while the left bank ones show a significantly weaker response. A clear differentiation in correlation coefficients was observed: negative for upstream offsets (up to –094) and positive for downstream ones (up to 0,91). Deformation processes were found to be more sensitive to minimum water levels, which could indicate a greater impact of dam unloading. Additionally, a time delay in significant deformation was identified: 15–20 years for the right bank and 20–25 years for the left. The findings highlight the practical importance of a differentiated monitoring approach, with priority attention to the right bank as a zone of increased sensitivity to reservoir regime changes, thereby enhancing dam safety management