Drainage Basin Analysis Essay
4.1.5. Bifurcation Ratio: The bifurcation ratio is of fundamental importance in drainage basin analysis as it is the foremost parameter to link the hydrological regime of a watershed under topological and climatic conditions (Raj et.al., 1999).It helps to have an idea about the shape of the basin as well as in deciphering the run off behavior. The bifurcation ratio will not be exactly same from one order to the next order because of possibility of the changes in the watershed geometry and lithology but will tend to be consistent throughout the series. Bifurcation Ratio is the ratio of the number of streams of a given order to the number of streams of next higher order.
4.1.6. Mean Bifurcation Ratio ((Rb) ̅) is calculated as the Arithmetic
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The drainage density suggests permeability of subsoil. The bifurcation ratio indicates normal basin category. The analysis of the relative relief of the area comes under the category of 30-60 m and at some places relative relief is very high and it suggests rugged topography. The bifurcation ratio indicates normal basin category. Low form factor value 0.141 indicates basin elongation and structural and topographical control on the basin. Sudden decline of stream frequency demarcates the boundary between upper and lower catchments. High stream frequency, drainage density, low constant of channel maintenance in the upper catchment connote high ruggedness, multifaceted slope variation while low stream frequency reflect gentle slopes and flat topography in the lower catchment. In the lower basin there also denotes greater chance of flood. Drainage integration of the basin also increases flood risk. Possibility of surface water stagnation is also quite high due to low stream frequency and drainage density at its lower reach. This observation is supported by frequent flood in the lower segment of the
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