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Sundriyal, Y. P.
- Comparative Study of Soil Profiles Developed on Metavolcanic (Basaltic) Rocks in Two Different Watersheds of Garhwal Himalaya
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PDF Views:96
Authors
Affiliations
1 Wadia Institute of Himalayan Geology, Dehradun 248 001, IN
2 H.N.B. Garhwal University (Srinagar), Srinagar 246 174, IN
1 Wadia Institute of Himalayan Geology, Dehradun 248 001, IN
2 H.N.B. Garhwal University (Srinagar), Srinagar 246 174, IN
Source
Current Science, Vol 108, No 4 (2015), Pagination: 699-707Abstract
Soil profiles are rarely preserved in the Himalaya due to active tectonics and erosion. We have studied two rarely well-preserved soil profiles developed on metavolcanic rocks namely Alaknanda soil profile (ASP) and Bhilangna soil profile (BSP) in Alaknanda and Bhilangna watersheds of the Garhwal Himalaya. Geochemical studies were carried out to understand the elemental mobility with reference to the least altered rock (LAR) in both the profiles and are compared. Differences in major element behaviour noticed are depletion of Ca and K in ASP, and depletion of Ca and Na in BSP. Trace elements also show variable mobility such as leaching of Rb, U and enrichment of Sr, Ni in ASP. In BSP, behaviour of these elements is just the opposite. Accumulation of ΣREEs in saprolitic layer and depletion in regolith of ASP suggest that rare earth element (REE) mobility took place during advanced stages of weathering. In BSP, increase in REE content from LAR to regolith suggests dominance of chemical weathering over physical weathering. This is also reflected in chemical index of alteration values which suggest variation of climatic parameters such as rainfall in the region.Keywords
Climate–Tectonic Interaction, Geochemical Behaviour, Lesser Himalaya, Physical and Chemical Alterations, Weathering.Full Text
- Quest for Disaster-Resilient Roads in The Himalaya
Abstract Views :193 |
PDF Views:82
Authors
Affiliations
1 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Basic and Social Science, College of Forestry, Ranichauri, Tehri Garhwal (VCSGUUHF, Bharsar), IN
3 Department of Geology, HNB Garhwal University, Srinagar, Garhwal 246 174, IN
4 School of Media and Communication Studies, Doon University, Dehradun 248 001, IN
1 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
2 Department of Basic and Social Science, College of Forestry, Ranichauri, Tehri Garhwal (VCSGUUHF, Bharsar), IN
3 Department of Geology, HNB Garhwal University, Srinagar, Garhwal 246 174, IN
4 School of Media and Communication Studies, Doon University, Dehradun 248 001, IN
Source
Current Science, Vol 121, No 11 (2021), Pagination: 1399-1401Abstract
Mountain roads are important lifelines and the most critical means for connectivity in the Himalayan villages of India. However, the inherent geological, geomorphological, ecological and climate fragility of the terrain warrants critical scientific investigations for the roads to sustain the vagaries of nature. Further, the increased frequency of extreme events with the ongoing climate change increases the potential impact of disasters. This note highlights the major challenges and issues faced with the ongoing road-widening projects in the country. It cautions against the uniform standard of road widening and the need to increase sensitivity towards appreciating the terrain fragility.Full Text
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- Unstable Slopes and Threatened Livelihoods of the Historical Joshimath Town, Uttarakhand Himalaya, India
Abstract Views :87 |
PDF Views:68
Authors
Affiliations
1 Department of Basic and Social Sciences, College of Forestry, Ranichauri 249 199, IN
2 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
3 Department of Geology, HNB Garhwal University, Srinagar Garhwal 246 174, IN
4 Department of Geology, Centre for Advance Studies, University of Delhi, Delhi 110 007, IN
5 Department of History, VSKC, Govt PG College, Dakpatthar, Dehradun 248 125, IN
6 Geosciences Division, Physical Research Laboratory, Ahmedabad 380 058, IN
1 Department of Basic and Social Sciences, College of Forestry, Ranichauri 249 199, IN
2 Department of Geography, Institute of Science, Banaras Hindu University, Varanasi 221 005, IN
3 Department of Geology, HNB Garhwal University, Srinagar Garhwal 246 174, IN
4 Department of Geology, Centre for Advance Studies, University of Delhi, Delhi 110 007, IN
5 Department of History, VSKC, Govt PG College, Dakpatthar, Dehradun 248 125, IN
6 Geosciences Division, Physical Research Laboratory, Ahmedabad 380 058, IN
Source
Current Science, Vol 124, No 12 (2023), Pagination: 1384-1392Abstract
This study analyses the causes and consequences of slope instability around the historical Himalayan town of Joshimath, Uttarakhand, India. The town is in the Higher Himalaya near the Main Central Thrust. The lithology constitutes fissile, shattered and sheared gneiss. Consequently, the slopes are prone to land subsidence and mass wasting. In the last few decades rise in population has led to a surge of infrastructure development, thus causing immense pressure on the finite resources and limited accommodation space on precariously balanced vulnerable slopes. Particularly, the unplanned infrastructure development, lack of adequate drainage and excavation of roads through unstable debris slopes are some of the reasons that seem to have accelerated the ongoing slope instability and land subsidence.Keywords
Geological Fragility, Higher Himalaya, Historical Town, Land Subsidence, Slope Instability.Full Text
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