This study scrutinizes the dam behavior during different rates of water level fluctuations via centrifuge model tests and
verifies the results by numerical analyses. LVDTs and pore water pressure gauges were installed to scrutinize the settlement
and pore water pressure behavior during different rates of water level fluctuation. The centrifuge model test results
suggest that the increased rate of water level fluctuation increases the risk of dam failure as drastic variations in pore water
pressure and differential settlement were observed. The differential settlement in the upstream and downstream sides of the
dam due to water level fluctuation increases the risk of cracking in the dam crest. Also, the dam stability was evaluated by
comparing and analyzing the pore pressure and deformation distribution values obtained from the centrifuge model tests with numerical analysis results. Soil-void fluid coupled analyses were performed in the steady and unsteady seepage flow conditions. The analysis results manifest that the increased rate of fluctuation in water level becomes a factor for a rapid increase in the displacement and pore pressure of the dam body, resulting in a reduction in the dam stability. Thus, realtime monitoring of the displacement and pore water pressure during rapid fluctuations in water level, such as heavy rain, is required to ensure dam stability.