Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

R. Anbalagan ¹

Affiliations
1 Department of Earth Sciences, Roorkee 247 667, IN

Abstract

Construction of big dams lead to modification of existing fluvial conditions, in addition to affecting the socio-economic conditions of the people of the area. Analysis of the environmental impact on river-bed morphology, hydrogeological regime, stability of hill-slopes around reservoir, seismicity conditions, land-use and socio-economic conditions due to construction of the proposed 130m high dam across the Gaula River at Jamrani (29°16' : 79°36'36") in the Nainital District, Kumaun Himalaya, indicates that there may not be any adverse environmental impact in the area, but on the contrary the project is likely to bring economic benefits to the Bhabar belt of the Nainital District, by enhancing water availability for domestic, industrial and agricultural needs.

Keywords

Environmental Geology, Jamrani Dam Nainital District, Kumaun Himalaya, United Provinces.

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Dhrubajyoti Chakraborty ¹, R. Anbalagan ¹

Affiliations
1 Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee-247667, IN

Abstract

The Himalaya is vulnerable to instability and mass-wasting processes The large-scale anthropogenic activities, which are often earned out without accounting for the already existing adverse parameters may further deteriorate the stability conditions Particularly because of the rapid rate of construction oi roads, the inherent geological and geotechnical parameters are often not taken into consideration in the planning and design stages In case of road cut slopes, evaluation of landslide hazards along the alignment is required to minimize fuither instability The paper deals with stability evaluation techniques for 28km long Uttarkashi-Bhatwari road section falling in the important Uttarkashi- Gangotri route in Bhagirathi valley of Garhwal Himalaya The 'modified SMR' technique [{BIS 13365(Part 3) 1997}] has been applied for rock cut slopes and circular failure charts of Hoek and Biay (1981) have been used for slopes consisting of debris The objective of the paper is to evaluate the instability problems of cut-slopes and to suggest suitable remedial measures.

Keywords

Himalaya, Road cut slopes, Modified SMR technique, Circular failure charts, Factor of safety, Control measures.

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