ANNOUNCEMENTS
Periyar River can be called lifeline of Kerala. The River has been a boon to the people, and economy of the state. The recent changes in the climate has caused several changes in the rainfall and the weather pattern in the river basin. The region has seen several floods in the recent decade. This paper is has three objectives, all the objectives are interlinked to each other. Starting with building a 1D – 2D hydro-dynamically coupled model for the lower Periyar basin. The coupled model gives advantage of both individual models in one model. The return period discharge data is calculated using Gumbel Distribution method. This discharge is used in the model and thus is used to generate inundation maps of the river basin. These inundation models are generated for different return periods. The results thus obtained using the model is fully hydrodynamic in nature as we ignore the rainfall that is there in the lower Periyar basin as majority of discharge due to rainfall is due to upper region. The inundation maps of different return periods provides us with the information on the regions that are prone to different intensity of flooding. These inundation maps of different return periods are further used to develop a Flood hazard map for the region. These maps can be used for preventing loss of life and property by taking steps to reduce the risk in the risk prone areas. The uncertainties in the model are due to the low resolution of the Digital Elevation Model that is used to generate the cross- sections and the flood plain of the river.
Keywords: Periyar River, MIKE Plus, Hydraulic Modeling Hydrodynamic Modelling, Flood Modelling, Coupled Model, Inundation.
