A HOLISTIC FLOODING SOLUTION FOR THE CASE STUDY OF CENTRAL BUCKINGHAM CANAL WATERSHED

Mostly populous city like Chennai is subjected to frequent pluvial and fluvial flooding in low-lying areas. The factors attributed to flooding are due to its complex nature of natural and anthropogenic factors such as insufficient capacity of the local drainage system, high intense rainfall associated with cyclonic activity, the highly impervious area which leads to block the runoff to drain into the river. To address these issues of flooding, a need is felt to focus on the magnitudes of flooding and how to mitigate flood from occurrence. Therefore, a study has been conducted on Central Buckingham canal watershed to develop a coupled 1D and 2D numeric model for assessing the flood extent and flood depth From the model results, the simulated flood depth showed good agreement against the observed flood depth at known outlets. Finally, as a part of flood mitigation measures, revised storm water drainage system which enhances the flood carrying capacity of the drains which results in less inundated area which solves the problem of urban flooding have been implemented. After adopting the measure, the study shows the watershed is free from flooding which makes the flow into the channels without any blockades