COMPREHENSIVE FLOOD MITIGATION AND MANAGEMENT IN VELLIANGAL ODAI, VEERANAM TANK, CUDDALORE DISTRICT, TAMLNADU STATE, INDIAN. Ravisankar and S. Gnanakumar
Floods are naturally occurring processes that are difficult to prevent but can be managed in order to reduce its social and economic impacts. Mitigation is defined as a continued action to minimize risk property or human. The Muskingum model is a popular method to analyze the flood routing. The objectives of the study are to study the generating techniques for flood routing and also to evaluate the old used methods, to assess the accuracy of the available flow data and to check the results through basic flood routing methods and to find out the most vulnerable livelihood assess and also factors influencing to occupational and socio migration in the study area. The study area is Velliangal odai, Veeranam Tank, Cuddalore district, Tamilnadu state. The methodology used for this study is Muskingum method. The hydrometric data was applied in the study have been the collected from the public work department in Chidambaram (2001-2018), this data included water levels, inflow and outflow estimation. In this study, Reaches of different lengths were selected to assess the influence of river length in the application of flood routing methods. The Muskingum Parameters for the Velliangal Odai river at varying x calculated as shown in the graph is plotted with [K(Ix+(1"x) Q)] on x-axis and the storages on y-axis. The points indicate the formation of a loop and there is improvement when x tends to zero. In the beginning the loop was narrower at x= 0.35 but in the third trial at x= 0.25 is computed, found satisfactory. Therefore, the correct value of x can be taken as 0.25 for the Velliangal Odai River.