Prognosis and mitigation strategy for major landslide-prone areas Varunavat Parvat landslide in Uttarkashi

DPM
17,5
632
Figure 5.
Landslide map of Varunat
Parvat area
Plate 7.
View of Varunavat Parvat
about one and a half
decade back
superposed over the vast terraces of Bhagirathi river. Varunavat Parvat has witnessed
extensive development of colluvial deposits due to gravity transport on its moderate to
steep slopes (Figures 4 and 5; Plates 1, 7 and 8). Salra village in the NW of Uttarkashi
township is located over colluvium and the southern slope aspects of Varunavat Parvat
(towards Bhagirathi river) also have large colluvial deposits. The northeastern part of
Uttarkashi township in the north of National Highway is located over the distal part of
colluvial fan deposits (Figure 5). Furthermore, on the southern bank of Bhagirathi river
the villages of Jaspur and Silyana are located over colluvium. On the northern bank of
the river the alluvial fans of Gyansu and Padull are conspicuous and distal part of both
these fans have habitations (Figure 4). On the southern bank of Bhagirathi river the
alluvial fans are developed around Pokhri, Dang and Kotyalgaon. In the east of
Uttarkashi township the villages of Ujeli and Tiloth are located over terrace deposits.
Major part of Uttarkashi township is also located over the terrace deposits. Joshiyara,