Sub-watershed wise Runoff Modeling using Drainage Morphometric Analysis in Karur District, Tamil Nadu, India through Remote Sensing and GIS Techniques

Morphometric examination, being extensively used to evaluate the drainage individuality and have been found to be a helpful tool to identify areas runoff prone sub-watersheds in this current study. Remote Sensing and Geographical Information System has been demonstrated as successful apparatus in the demarcation of drainages and sub-watersheds boundary and morphometric investigations of sub-watersheds. The current study integrates a morphometric study of 68 sub-watersheds of Karur District, Tamil Nadu, India. Common morphometric parameters are measured for analysis. The following morphometric features such as drainage density, bifurcation ratio, drainage texture, circularity ratio, stream frequency, and form factor has a straight connection by runoff, i.e., superior these values, then, more is the runoff. For the recognition of runoff prone sub-watersheds, the uppermost values of above limits were rated as rank 5, the subsequent uppermost values were rated as rank 4 and so on, and the least values of these factors were charged last in rank 1. The factor such as elongation ratio and length of overland flow has an opposite connection with runoff, i.e., lesser these values; supplementary is the runoff. Therefore the lowly values of these factors were rated as level 5, subsequently, lower values were rated as rank 4 and so on and the maximum values of these parameters were rated last in rank 1. The above-weighted maps were in ArcGIS software to identify the runoff prone sub-watersheds. The current study will improve the systematic understanding of watershed characteristics and its runoff proneness of the study area since there is no prior information is accessible in this study region. The results of the current research will support the development of further hydrological improvement actions in the study area watersheds. Keywords: GIS, morphometric analysis, remote Sensing, sub-watershed-runoff prone modeling Cite this Article J. Muralitharan, K. Palanivel. Sub-watershed wise Runoff Modeling using Drainage Morphometric Analysis in Karur District, Tamil Nadu, India through Remote Sensing and GIS Techniques. Journal of Remote Sensing & GIS. 2019; 10(2): 52–65p.