Importance of Morphometry Studies, Land Form Processes to Find Prioritize Areas Where Flood Control - Using Remote Sensing and Gis For Tamiraparani Subbasin, Tirunelveli District, Tamil Nadu, India

In addition to standard methods, efforts are being created to explore the importance of morphometry by incorporating Remote Sensing information and techniques into a GIS platform. In order to determine the drainage features using GIS method, a morphometric assessment of the Tamiraparani sub basin was performed. The study proved the prospective use of remotely sensed data and geographic information systems (GIS) in calculating linear, relief and areal morphometric parameters and analyzing their impact on the genesis and processes of landforms and soil parameter characteristics such as texture, drainage and soil erosion conditions. Visual interpretation of satellite information in the assessment of the characteristics of geology, landforms and soil erosion in combination with drainage patterns promotes the efficient delineation of separate characteristics to assess the impact of drainage morphometry. The model offers a drainage basin after implementation with the categorized flow network of Strahler backed by thematic layers such as aspect, slope, relief, and soil density. The developed model demonstrates that this subbasin's drainage area is 734.84 km²and shows a subdendritic drainage pattern to dendritic. The basin involves a stream of sixth order, mostly dominated by lesser stream order. The study area's slope varies from 0° east to 61° west. Western Ghats’ presence is the main controlling factor for variation in the slope. In addition, local lithology and erosion cycles control the slope variety. The bifurcation ratio shows that the geological structures have little impact on the drainage networks, and the drainage density shows that the subsurface strata are permeable.