Impact Assessment of Hydrologic Attributes and Slope Instability - Semi-quantitative Approaches for Landslide Assessment and Prediction - page 106

Fig. 3.4 Spatial distribution of drainage up to 5th order, 1987

Order wise spatial distribution of drainage network of sub-watersheds in the
Shivkhola Watershed (1987) shows sub-watershed 6 and 1 are occupied by max-
imum number of 1st order streams and 4 and 5 are with minimum number of 1st
order streams (Fig. 3.4 ). Fifth order stream is mainly found in sub-watershed 1.
Sub-watershed 1 ranks 1st in terms of areal coverage which is followed by sub-
watershed 6, 3, 2, 4 and 5 (Table 3.5 ). So, sub-watershed 1 and 6 are susceptible to
soil erosion due to drainage concentration. As the drainage network of 1987 is
associated with the development of first order stream over the steep marginal area

and their continuous branching due to headward erosion, the rst order stream