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Singh, Devendra
- Study of Landslide Hazard Zonation in Mandakini Valley, Rudraprayag District, Uttarakhand Using Remote Sensing and GIS
Abstract Views :385 |
PDF Views:205
Authors
M. S. Rawat
1,
D. P. Uniyal
1,
R. Dobhal
1,
Varun Joshi
2,
B. S. Rawat
3,
Anil Bartwal
4,
Devendra Singh
5,
Ashok Aswal
5
Affiliations
1 Uttarakhand State Council for Science & Technology, Vigyan Dham Jhara, Dehradun 248 007, IN
2 Guru Govind Singh Indra Prastha University, Sector 16C, Dwaraka, New Delhi 110 078, IN
3 Dayanand Brijendra Swarup (PG) College, Dehradun 248 001, IN
4 Mandakini Hydropower Project, Phata 246 471, IN
5 Uttarakhand Space Application Centre, Vasant Vihar, Phase II, Dehradun 248 006, IN
1 Uttarakhand State Council for Science & Technology, Vigyan Dham Jhara, Dehradun 248 007, IN
2 Guru Govind Singh Indra Prastha University, Sector 16C, Dwaraka, New Delhi 110 078, IN
3 Dayanand Brijendra Swarup (PG) College, Dehradun 248 001, IN
4 Mandakini Hydropower Project, Phata 246 471, IN
5 Uttarakhand Space Application Centre, Vasant Vihar, Phase II, Dehradun 248 006, IN
Source
Current Science, Vol 109, No 1 (2015), Pagination: 158-170Abstract
The Mandakini Valley of Rudraprayag district, Uttarakhand witnessed unprecedented damage to life, property, infrastructure and landscape on 16 and 17 June 2013 due to torrential rains. Run-off discharge data indicate that antecedent rainfall exceeded the limit and the overflow of rivers led to landslide in the region and flash floods in the downstream areas. Fragile geology of the area, close to Main Central Thrust (MCT), degradation processes and torrential rains are responsible for triggering landslides and flash floods. A landslide inventory was carried out in the affected areas based on pre- and post-flood high resolution satellite data (LISS-IV and Cartosat-2). A total of 290 landslides were identified from pre-flood satellite LISS IV (2011) imagery and 1665 were identified in post-flood satellite imagery along major rivers. Using remote sensing and geographic information system techniques, thematic layers were generated. Using the weightage rating system, a landslide hazard zonation map of the area was prepared. Each class within a thematic layer was assigned an ordinal rating from 1 to 9. Summation of these attribute values was then multiplied by the corresponding weights to yield different zones of landslide hazard. A landslide hazard zonation map having five different zones ranging from very low hazard zone to very high hazard zone was prepared with the objective to create a reliable database for post-disaster management and for planning developmental activities in the district.Keywords
Flash Floods, Landslide Hazard Zonation, Satellite Data, Thematic Layers.Full Text
- Colonization of Algae and Cyanobacteria on Calcareous Remains of Dead Animals in Larsemann Hills, East Antarctica
Abstract Views :407 |
PDF Views:173
Authors
Affiliations
1 Cryptogamic Unit, Central National Herbarium, Botanical Survey of India, Howrah 711 103, IN
1 Cryptogamic Unit, Central National Herbarium, Botanical Survey of India, Howrah 711 103, IN
Source
Current Science, Vol 112, No 05 (2017), Pagination: 913-915Abstract
The Larsemann Hills (60°20'-60°30'S, 75°55'-76°30'E), is an ice-free coastal oasis of 50 km2, located approximately halfway between the Vestfold Hills and the Amery Ice Shelf on the southeastern coast of Prydz Bay, Princess Elizabeth land, East Antarctica, bordered by two main peninsulas, Broknes and Stornes and several islands. It is the second largest of only four major ice-free oases. A congenial microclimate along with adequate freshwater during summer provide a hospitable environment for the aquatic as well as terrestrial biota.Full Text
- Udaria-A New Liverwort Genus of Lophocoleaceae from Eastern Himalaya, India
Abstract Views :423 |
PDF Views:151
Authors
Affiliations
1 Botanical Survey of India, Kolkata 700 064, IN
2 Botanical Survey of India, Central National Herbarium, Howrah 711 103, IN
1 Botanical Survey of India, Kolkata 700 064, IN
2 Botanical Survey of India, Central National Herbarium, Howrah 711 103, IN
Source
Current Science, Vol 115, No 8 (2018), Pagination: 1536-1542Abstract
A new genus and species of liverwort, Udaria lamellicaulis gen. & sp. nov., referable to the family Lophocoleaceae is described from Arunachal Pradesh and Sikkim in Eastern Himalaya, India. The new taxon can be easily differentiated from hitherto all the known genera of the family in the presence of longitudinal, 1-12 cells high seriately arranged lamelliform strips on the surface of stem, leaves and female bracts, striolate-rugulose leaf cuticle, rhizoids arising from the lamina of underleaves, gynoecia with 1-2 subfloral innovations and gemmiparous female bracts and bracteoles.Keywords
Bryophytes, Eastern Himalaya, Liverwort, Marchantiophyta, New Genus and Species, Udaria lamellicaulis.Full Text
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