An Urban Flood Modeling Using Geospatial Technology: A Case Study of Mambalam Micro Watershed

V. Vidyapriya, R. Sheeja, R.B. Karthika and M. Ramalingam

Recently, the Chennai cities is more subjected to flooding, due to the underlining causes of waterlogging and storm drains capacity. So, a study is necessary to use latest LiDAR technology such as Digital Elevation Models (DEMs) for detailed flood risk mapping. In this study, Mambalam micro watershed which falls in Adayar basin was selected as a study area to estimate the flooding amount that arose in the year 2005 and 2015. With the advent of LiDAR technology accurate DEM of 1m resolution ground data is prepared for flood inundation mapping. In this study the main objective is to generate flood inundation maps using DEMs (LiDAR), hydrodynamic models for the preparation of flood risk mapping for the year 2005 and 2015 of Mambalam micro watershed. From the results it is found the runoff for Mambalam watershed of the existing drainage network, is higher which indicates the hot spot location of the inundated area. Therefore, as a pathway to the flood mitigation solution the existing drainage network in the study area have been revised. Ultimately, this research solves the problem of the flooded area. The solution will be helpful to the local storm flood management for better planning of city drainages.

Volume 12 | 05-Special Issue

Pages: 1443-1452

DOI: 10.5373/JARDCS/V12SP5/20201904