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Chopra, Sumer
- Shallow Subsurface Investigations for Resource Exploration and Hazard Estimation
Abstract Views :239 |
PDF Views:78
Authors
Affiliations
1 Institute of Seismological Research, Gandhinagar 382 421, IN
1 Institute of Seismological Research, Gandhinagar 382 421, IN
Source
Current Science, Vol 113, No 03 (2017), Pagination: 379-380Abstract
The international workshop which held at ISR, Gandhinagar encompassed five major themes, namely: (i) Exploration of groundwater and minerals; (ii) Geothermal resource mapping; (iii) Air and space-borne geophysical investigations; (iv) Active fault mapping; (v) Seismic hazard assessment (SHA): macro-micro and site specific and societal impact of SHA.Full Text
- Earthquake swarms in Palghar district, Maharashtra, Deccan Volcanic Province
Abstract Views :425 |
PDF Views:78
Authors
Affiliations
1 Institute of Seismological Research, Raisan, Gandhinagar 382 009, IN
1 Institute of Seismological Research, Raisan, Gandhinagar 382 009, IN
Source
Current Science, Vol 118, No 5 (2020), Pagination: 701-704Abstract
The Palghar district of Maharashtra falls in zone III of the seismic zoning map of India, where earthquakes up to magnitude 6.0 can occur1. A swarm activity was started in the Palghar district of Maharashtra in November 2018 and is still continuing (till the end of November 2019). According to reports from the National Centre for Seismology (NCS), more than 1,000 earthquakes of micro-tominor magnitude have occurred in the Dahanu and Talasari talukas of Palghar district, from 3 November 2018 to 15 February 2019. The biggest tremor of magnitude ML 3.7 was recorded on 1 February 2019, at 3.54 PM (IST). The people of Dahanu and Talasari talukas were panicked by the abnormal ground vibration and burst sound that they felt. In fact, Jawahar city in Palghar district has experienced swarms several times earlier.Full Text
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- Sateesh, A., Mahesh, P., Singh, A. P., Kumar, S., Chopra, S. and Ravi Kumar, M., Environ. Earth Sci., 2019, 78, 381; doi: 10.1007/s12665-019-8382-1.
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- Geoelectrical Study for Groundwater Resources in Parts of the Ahmedabad and Gandhinagar Cities, Gujarat, India
Abstract Views :109 |
PDF Views:65
Authors
Rakesh Nikam
1,
G. Pavankumar
2,
Vasu Pancholi
1,
Dilip Singh
1,
Mehul Nagar
1,
D. Nagarjuna
2,
Sumer Chopra
1
Affiliations
1 Institute of Seismological Research, Gandhinagar 382 009, IN
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
1 Institute of Seismological Research, Gandhinagar 382 009, IN
2 CSIR-National Geophysical Research Institute, Hyderabad 500 007, IN
Source
Current Science, Vol 124, No 3 (2023), Pagination: 340-347Abstract
The central alluvial plains of Gujarat, western India, consist of deposits of north–south flowing rivers from the Aravalli hills. The Gandhinagar and Ahmedabad districts in the state form a part of the Cambay basin and are occupied by Quaternary alluvium comprising mainly of sand, gravel, silt clay, kankar, etc. Direct current (DC) electrical resistivity studies have been carried out at six sites in Gandhinagar and Ahmedabad cities to map groundwater levels and major shallow subsurface geoelectric layers using a 72-electrode resistivity imaging system. Two dimensional (2D) resistivity models and borehole data infer a multilayered aquifer system in Ahmedabad. The top confined aquifer is at a depth of 22–25 m and the second unconfined aquifer is at a 60–65 m depth. These two aquifers are separated by highly compacted clay/clayey sand. For the two locations in Ahmedabad city, the 2D resistivity model suggests 10–15 m variation in the groundwater level. In Gandhinagar, as the survey location is close to the Sabarmati River and the exploitation of groundwater is less than in Ahmedabad, the groundwater table is at shallow level. Further, the resistivity estimates suggest that, at all three locations, the groundwater is moderately saline. The infer resistivity sections are correlated with groundwater level and borehole dataKeywords
Aquifers, Borehole Data, Groundwater, Sedimentary Basins, Two-Dimensional Resistivity Imaging.Full Text
References
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- Pancholi, V., Vinay, D., Bhatt, N., Chaudhary, P. and Chopra, S., Geotechnical investigation for estimation of liquefaction hazard for the capital city of Gujarat State, western India. Geotech. Geol. Eng., 2020, 38, 6551–6570.
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- Vinay, K. D., Dube, R., Pancholi, V., Mohan, M., Pawan, S., Sairam, B., Chopra, S. and Rastogi, B., Multi-criteria study for seismic hazard assessment of UNESCO world heritage Ahmedabad city, Gujarat, western India. Bull. Eng. Geol. Environ., 2019, 79, 1721–1733.