Observed water level (daily average) in the Ragas above the lake water level (zero reference is equivalent to 123 m of in situ elevation), when the Dardennes lake overflows by the dam spillway. Simulated water level of the reservoir C converted in height of water level above 123 m. a) Floods of January and February 2014 (with karst storage = 3.6 × 10⁻⁴) b) Flood of 26th November 2014 (with karst storage = 5.7 × 10⁻⁴).