Authors
DP Shukla, CS Dubey, AS Ningreichon, RP Singh, BK Mishra, SK Singh
Publication date
2014/4
Journal
Natural hazards
Volume
71
Pages
1433-1452
Publisher
Springer Netherlands
Description
Alaknanda river basin is considered to be tectonically active where damaging earthquakes and landslides have occurred. The whole basin was divided into 8 sub-basins to carry out morphometric analyses, hypsometric integral (HI) analysis and valley floor width to valley height ratio (V f) factor. The sub-basins 2 and 3 show that they are highly active, because of the higher values of bifurcation ratio, stream frequency asymmetric factor, and lower values of form factor, elongation ratio and circulatory ratio. In these areas, HI values are very low indicating that the landscape is highly eroded, deeply dissected and tectonically active. The result obtained from V f was similar which classified both these basins as highly active. Morphometric analysis, HI and V f analyses along with structural map of study area are used to prepare morpho-tectonic map classifying the whole area into very …
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