Two-dimensional flood modelling of the Damansara River

The various methodologies used in Malaysia for studying flood range from the traditional flood mapping through visual observations to one-dimensional river modelling. Although shown to be practicable, these conventional methods are still far from being able accurately to model the magnitude, direction, extent and rate of flood wave propagation over the flood plain. With the advent of geographic information system (GIS), light detection and ranging (Lidar) survey and advancement in hydraulic modelling software, this study utilises the advanced engineering technologies for the two-dimensional hydraulic modelling of the Damansara River. Results of the simulations show that the model is capable of providing crucial information such as direction and rate of flood propagation, flood inundation extent, flood depths and flood duration for the studied areas.