The dataset is the product of the 2D hydrodynamic simulation using TUFLOW Quadtree Solver version 2020-10-AF-iSP-w64 reported in ÒSlowing down the tidal flood wave is key to estuarine flood risk reductionÓ by Octria A. Prasojo, Richard Williams, Larissa A. Naylor, Jaime L. Toney and Martin D. Hurst. The dataset contains three modelling scenarios namely basecase, adding space and roughening the bed. These scenarios were simulated using 200-year recurrence interval of tidal plus 850mm sea-level rise and no river discharge from ClydeÕs tributaries (e.g. River Kelvin, Black Cart, White Cart, etc). We include raster files of flood water extent, longitudinal water and velocity profile in this dataset. Maps and figures generated from this dataset are produced using QGIS and RStudio.