Morphometric Studies of Fourth Order Sub-Basins (FOSB's) in North Bangalore Metropolitan Region Using Remote Sensing and Geographic Information System Techniques

The quantitative analysis of drainage system is an important aspect of characterization of watersheds. Using watershed as a basic unit in morphometric analysis is the most logical choice because all hydrologic and geomorphic processes occur within the watershed. The North Bangalore Metropolitan Region is constitutes a part of North Pennar, South Pennar and Cauvery Basins has been selected for the case illustration. Geo-informatics module consists of GIS mapping for location map, drainage map, surface water body map, sub-basin map etc are generated. Morphometric module consists of morphometric analysis for several drainage basin parameters include stream order, stream length, bifurcation ratio, drainage density, drainage frequency, form factor, elongation ratio, circularity ratio, texture ratio, length of overland flow and constant of channel maintenance are also calculated. An attempt has been made to utilize the interpretation capabilities of GIS to find out the relationship between the morphometric parameters at sub basin level