The dataset is provided in daily temporal resolution, from 01-Mar-2018 to 28-Feb-2019. It includes observed meteorological conditions within the catchment of gauge Campo Largo, observed and simulated discharge and water temperature of Passaúna River at gauge Campo Largo, observed water temperature at surface and bottom of Passaúna Reservoir at the reservoir temperature gauge, and density current classifications according to observations and simulated scenarios: Air Temperature (°C) Incoming short wave radiation / Rglob (W m-2) Precipitation (mm day-1) Observed discharge (m3 s-1) Simulated discharge (m3 s-1) River WT observed (°C) River WT simulation scenario present state of shading (°C) River WT simulation scenario full shading (°C) River WT simulation scenario no shading (°C) Reservoir WT surface observed (°C) Reservoir WT bottom observed (°C) Density current classification - observed Density current classification - simulation scenario present state of shading Density current classification - simulation scenario full shading Density current classification - simulation scenario no shading