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Ahmed, Shakeel
- Application of Kriging Techniques in Groundwater Hydrology
Abstract Views :193 |
PDF Views:2
Authors
Affiliations
1 Paris School of Mines, Fontainebleau, FR
1 Paris School of Mines, Fontainebleau, FR
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 29, No 1 (1987), Pagination: 57-82Abstract
Many common parameters of groundwater hydrology are found to be "regionalized variables", i.e. they are highly variable but exhibit a certain spatial structure. Geostatistics, which has been developed for the estimation of the grade of ore bodies, is found to be equally applicable to groundwater problems as well.
The basic principles of a geostatistical estimation are outlined, and the usual kriging equations given. The extension of kriging to multivarliate problems is also described. An example is given of the use of these methods for the estimation of the transmissivity using a limited number of observations, both pumping test and specific capacity data. The study was carried out on the chalk aquifer (3000 km2) lying partly in northern France and partly in western Belgium. Both values of transmissivity (72 data points) and specific capacity (235 data points) show a log-normal distribution. All the three methods of cokriging, kriging combined wlth linear regression and kriging with the mean as a function of another variable yielded same results for the transmissivity values estimated.
- A Geostatistical Approach to Resource Evaluation of Kalta Iron Ore Deposit, Sundergarh District, Orissa
Abstract Views :180 |
PDF Views:135
Authors
Affiliations
1 National Geophysical, Research Institute, Hyderabad - 500 007, IN
2 Indian School of Mines, Dhanbad, IN
1 National Geophysical, Research Institute, Hyderabad - 500 007, IN
2 Indian School of Mines, Dhanbad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 4 (2006), Pagination: 542-545Abstract
No Abstract.Full Text
- Geostatistical Studies of a Gold Prospect in Sidhi District, Madhya Pradesh
Abstract Views :155 |
PDF Views:147
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad, IN
2 Indian School of Mines, Dhanbad, IN
1 National Geophysical Research Institute, Hyderabad, IN
2 Indian School of Mines, Dhanbad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 4 (2006), Pagination: 549-550Abstract
No Abstract.Full Text
- Delineation of Groundwater Prospect Zones in Hard Rocks Using Remote Sensing and GIS - A Case Study from Rajasthan
Abstract Views :182 |
PDF Views:3
Authors
Affiliations
1 lndo French Centre for Groundwater Research, National Geophysical Research Institute. Hyderabad - 500 007, IN
1 lndo French Centre for Groundwater Research, National Geophysical Research Institute. Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 2 (2006), Pagination: 259-268Abstract
Groundwater resources are extremely important in Rajasthan as almost the entlre region lies in arid/semi-arid tropics especially in the hard rock areas. The recharge being less due to scanty rainfall. The study has revealed the advantages of remotely sensed data in identifying the prospects of groundwater in geologically and structurally complex terrain. Remote Sensing (RS) and Geographic Information System (GIS) is a dynamic tool for facilitating the generation and use of thematic information; has been applied to know the groundwater potentiality of the Upper Kali Sindh Chauli watershed in the Jhalawar district of Rajasthan, India. The role of different parameters namely geology, geomorphology, structures, lineaments, slope, land use and land cover, digital elevation model, etc. have been emphasized for delineation of the groundwater potential Zones. The groundwater potentia1 zone map was prepared based on the visual interpretation of satellite Geocoded data of IRS-ID, LISS III, FCC and the topographic maps on 1:50,00 scale. In thc study area major lineaments are identified from the satellite data interpretation, which are surface manifestation of some structural features in the bedrocks as fractures and joints. The study area is divided into mint-watershed and micro-watershed on the basis of area and stream channels. Groundwater prospects are controlled by the lineaments/joints, as the lithology is not much suitable for groundwater development. Ultimate groundwater prospecting map indicatea variable groundwater potentiality in the area i.e. good, moderate, limited, and poor and based on these categorization the depth of wells are recommended for drilling.Keywords
Topographic map, Satellite data, Mini-Watershed, Micro-Watershed, RS and GIS, Jhalawar, Rajasthan.- CSIR-National Geophysical Research Institute, Hyderabad
Abstract Views :263 |
PDF Views:96
Authors
Affiliations
1 CSIR–National Geophysical Research Institute, Uppal Road, Hyderabad 500 007, IN
1 CSIR–National Geophysical Research Institute, Uppal Road, Hyderabad 500 007, IN
Source
Current Science, Vol 108, No 11 (2015), Pagination: 2010-2013Abstract
The National Geophysical Research Institute, Hyderabad, under the aegis of the Council of Scientific and Industrial Research, New Delhi, continued its scientific pursuit in many important areas of basic and applied earth sciences research encompassing geophysics, geology, geochemistry, geochronology and geodesy during the year 2014. The Institute is credited with 167 research publications and has accomplished several national and international projects. We give in this article an overview of three select scientific achievements.Keywords
Aquifer Systems, Earth Sciences Research, Mafic Magmatism, Seismic Hazard.Full Text
- Electrical Resistivity Imaging Technique to Delineate Coal Seam Barrier Thickness and Demarcate Water Filled Voids
Abstract Views :185 |
PDF Views:0
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 606 (Council of Scientific and Industrial Research), IN
2 Central Institute of Mining and Fuel Research, Dhanbad - 826 001, IN
1 National Geophysical Research Institute, Hyderabad - 500 606 (Council of Scientific and Industrial Research), IN
2 Central Institute of Mining and Fuel Research, Dhanbad - 826 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 5 (2009), Pagination: 639-650Abstract
Exploration and exploitation of coal seams is one of the major resources for the energy sector in any country but at the same time water filled voids/water logged areas in the old workings of these seams are very critical problems for the coal mining industry. In such situations, disasters like inundation, landslides, collapsing of the old seams may occur. In this regard, it is necessary to find out the water saturated/water filled voids and zones in the mining areas. Since no established technique is available to find such zones, an experimental study using Electrical Resistivity Imaging (ERI) has been carried out in one of the coal mining areas near Dhanbad, to find out the feasibility of finding the barrier thickness and the water logged area in underground coal mines. The area under study forms part of Jharia coalfield in Dhanbad district, Jharkhand state. The coal bearing rocks of Barakar Formation of Lower Permian age (Gondwana period) occur in the area under a thin cover (10 m to15 m) of soil and or alluvium. Coal bearing Barakar Formations consist mainly of sandstone of varying grain size, intercalation of shale and sandstone, grey and carbonaceous-shale and coal seams.Since the water saturation reduces the resistivity of a formation to a large extent, water filled voids and old coal workings are expected to have significant resistivity contrast with the surrounding host rock. Hence, ERI technique was applied in such an environment as this technique uses high-density data acquisition both laterally and vertically by using multiple number of electrodes. Along with ERI, mise-a-la-masse (also called charged body) technique was also employed at one of the promising sites to find out the connectivity of water logged areas and also detection of these old workings from the surface measurements was analyzed. The interpreted 2D resistivity sections have clearly indicated the water bearing zone(s) along the profile which was well confirmed with the existing water level in the nearby borewells. On the other hand, this technique did not identify the size of the coal pillar and gallery (air filled voids), which might be due to the small size of the voids (i.e. about 2 m × 2 m) below a depth of 15m and more but have indicated altogether as a high resistive zone ranging from 600-1000 Ohm-m.
Keywords
Coal Seams, Water Filled Voids, Electrical Resistivity Imaging, Jharia Coalfield, Dhanbad, Jharkhand.References
- ANTONIO-CARPIO, R.G., PEREZ-FLORES, M.A., CAMARGO-GUZMAN, D. and ALANIS-ALCANTAR, A. (2004) Use of resistivity measurements to detect urban caves in Mexico City and to assess the related hazard. Natural Hazards and Earth System Sciences, v.4(4), pp.541-547.
- BARKER, R.D. (1992) A Simple Algorithm for Electrical Imaging of the Subsurface. First Break, 10, pp.53-62.
- GRIFFITHS, D.H., TURNBULL, J. and OLAYINKA, A.I. (1990) Two Dimensional Resistivity Mapping with a Computer Controlled Array. First Break, 8, pp.121-129.
- GRIFFITHS, D.H. and TURNBULL, J. (1985) A Multi Electrode Array for Resistivity Surveying. First Break 3, pp.16-20.
- GRIFFITHS, D.H. and BARKER, R.D. (1993) Two-Dimensional Resistivity Imaging and Modeling in Areas of Complex Geology. Jour. Applied Geophys., v.29, pp.211-226.
- HALLOF, P.G. (1966) The use of resistivity results to outline sedimentary rocks types in Ireland. Mining Geophysics, SEG, v.1.
- JAIN, S.C., KUMAR, R. and ROY, A. (1973) Some results of experimental geophysical surveys for location of ancient gold workings, Kolar, India. Geophysical Prospecting, v.21, pp.229-242.
- KEAN, WILLIAM, F., MURIEL JENNINGS WALLER and RICHARD LAYSON, H. (1987) Monitoring Moisture Migration in the Vadose Zone with Resistivity. Groundwarter, v.25, No.5, pp.562-571.
- KRISHNAMURTHY, N.S., ANANDA, RAO, V., NEGI, B.C., KUMAR, D. and JAIN, S.C. (2003) Geophysical Exploration for Identification of Old Workings in East Basuria, Colliery, Sponsored by BCCL, Technical Report No. NGRI-2003-GW-389.
- KUMAR, D., KRISHNAMURTHY, N.S., AHMED, S., JAIN, S.C. and DHAR, R.L. (2003) Mise-a-la-masse technique in establishing the lateral extension of fractures in hard rocks, Jour. Geol. Soc. India, v.61, No.2, pp.185-194.
- LOGN, O. (1954) Mapping nearly vertical discontinuities by earth resistivities, Geophysics, v.19, pp.739-760.
- LOKE, M.H. and BARKER, R.D. (1996) Rapid Least-Squares Inversion of Apparent Resistivity Pseudosections by a Quasi-Newton Method. Geophysical Prospectings, v.44, pp.499-524.
- LOKE, M.H. (1997) Electrical imaging surveys for environmental and engineering studies: A practical guide to 2-D and 3-D surveys, 61p.
- LOKE, M.H. (1997a) Software: RES 2D INV. 2D interpretation for DC resistivity and IP for windows 95. Copyright by M.H. Loke. 5, Cangkat Minden Lorong 6, Minden Heights, 11700 Penang, Malaysia. Email: loke@pc.jaring.my
- MAILLOL, J.M., SEGUIN, M.K., GUPTA, O.P., AKHAURI, H.M. and SEN, N. (1999) Electrical resistivity tomography survey for delineating uncharted mine galleries in West Bengal, India. Geophysical Prospecting, v.47(2), pp.103-116.
- MECL (1986) Geological Report on Exploration for coal, Kumari OCP Jharia Coalfield, Dist. Dhanbad, Bihar, MECL.
- PATELLA, D. (1978) Resistivity sounding on a multi-layered earth with transitional layers. part-II : Theoretical and field examples. Geophysical Prospecting, v.26, pp. 130-156.
- SCHLUMBERGER, C. (1920) Etudes sur la Prospection Electrique du sous sol. Gauthiers-Villars, Paris, 94.
- SINGH, J. and JHA, B.P. (1972) Resistivity profiles over some dykes of Dhanbad. Geophysical Prospecting, v.20, pp.130-141.
- STANLEY, W.D., JACKSON, D.B. and ZOHDY, A.A.R. (1976) Deep electrical investigation in the Long Valley geothermal area, California. Jour. Geophys. Res., v.81, pp.810-820.
- TELFORD, W.M., GELDART, L.P., SHERIFF, R.E. and KEYS, D.A. (1976) Applied Geophysics, mise-a- la-masse resistivity method, pp.658-662.
- VAN NOSTRAND, R. and COOK, K.L. (1966) Interpretation of resistivity data, USCGS Professional Paper-499, US Govt. Printing Office, Washington.
- VAN SCHOOR, M. (2005) The application of in-mine electrical resistance tomography (ERT) for mapping potholes and other disruptive features ahead of mining. Jour. South African Instt. Mining and Metall., v.105(6), pp.447.
- VERMA, R.K., BHUIN, N.C. and BANDOPADHYAY, T.K. (1983) Use of Electrical Resistivity Methods for Study of Coal Seams and Mica-Peridotite Sills in Northwestern part of Jharia Coalfield, India. Jour. Assoc. Exploration Geophysicists, v.4, No.2, pp.13-22.
- WILKINSON, P., CHAMBERS, J., MELDRUM, P., OGILVY, R. and MELLOR, C. (2005) A comparison of self-potential tomography with electrical resistivity tomography for the detection of abandoned mineshafts. Jour. Environ. Engg. Geophysics, v.10 pp.381-389.
- ZOHDY, A.A.R. (1969) The use of Schlumberger and equatorial soundings in groundwater investigations near El Paso, Texas. Geophysics, v.34, pp.713-728.
- ZOHDY, A.A.R., ANDERSON, L.A. and MUFFLER, L.J.P. (1973) Resistivity, Self-potential and Induced Polarisation surveys of a vapour dominated geothermal system. Geophysics, v.38, pp.1130-1144.
- Environmental Impact on Groundwater of Maheshwaram Watershed, Ranga Reddy District, Andhra Pradesh
Abstract Views :185 |
PDF Views:0
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Geology Department, Osmania University, Hyderabad - 500 007, IN
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Geology Department, Osmania University, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 6 (2011), Pagination: 539-548Abstract
Maheshwaram watershed is situated in Ranga Reddy district of at a distance of about 30 km south of Hyderabad. The watershed has an area of 53 km2 and has hard rock aquifers with semi-arid climate. The study area has been expanding at a fast pace and now has the distinction of being one of the fastest growing urban centers, facing the problem of groundwater depletion and quality deterioration due to the absence of perennial source of surface water and also due to over exploitation. Human activities involving industrial and agricultural development and the inadequate management of land and water resources have, directly or indirectly resulted in the degradation of environment viz. water and soil.
In the present study chemical analysis of groundwater samples of the study area, collected in pre- and post-monsoon has been carried out. The analysed data is utilized to characterize the hydro chemical process dominant in the area. Various classification methods such as Piper, Back and Hanshaw, Wilcox, U.S. Salinity Laboratory are employed to critically study the geochemical characteristics of groundwater.
Keywords
Groundwater, Geochemistry, Anthropogenic, Environment, Watershed, Maheshwaram, Andhra Pradesh.- Cognitive Workload Assessment using Neuro Headset
Abstract Views :128 |
PDF Views:0
Authors
Affiliations
1 College of Computer Sciences and Information Technology, King Faisal University, Hofuf, SA
1 College of Computer Sciences and Information Technology, King Faisal University, Hofuf, SA
Source
Indian Journal of Science and Technology, Vol 10, No 24 (2017), Pagination:Abstract
This research aims to provide an easy way to visualize attention levels of a subject through neural interface device and to demonstrate the potential of a neural interface at low cost. A neuroheadset device can play an important role in measuring a subject’s attention and inform the subject about his/her attention levels. For few people, it would be better to measure the attention levels before doing an activity that could end up in bad results due to lack of attention which is a common problem in everything ranging from medical errors during operation to driving errors. In the research the attention level of the brain activity is measured to capture the mood of subjects more specifically which is based on two test cases the first test is carried out with a set of questions which includes logic puzzles and mathematical problems and the second test is with a game to measure subject’s attention. The system is organized with a set of assessment measures adopted by covariance matrix and cosine similarity metric. Experimental results demonstrate that our approach provides highly correlation among similar attributes under subjects with identical background.Keywords
Brain Computer Interaction, Covariance Matrix, Cognitive Workload, Electroencephalography, NeuroheadsetFull Text
- Fog Computing: A Novel Approach to Provide Security in Cloud Computing
Abstract Views :198 |
PDF Views:0
Authors
Affiliations
1 College of Computer Sciences and Information Technology, King Faisal University, Hofuf, SA
2 College of Computer Sciences and Information Technology, King Faisal University, Hofuf,, SA
1 College of Computer Sciences and Information Technology, King Faisal University, Hofuf, SA
2 College of Computer Sciences and Information Technology, King Faisal University, Hofuf,, SA
Source
Indian Journal of Science and Technology, Vol 11, No 15 (2018), Pagination:Abstract
Objective: Cloud Computing is the future solution which all companies in the world aim to depend on for its day to day operations because of its big advantages compared with that of the on premises systems. The major challenging issues in Cloud-based environment are security, user authentication, access control, and ensuring the security of stored data in Cloud servers which makes most of the functional and technical people to work on the aspects of security and to provide a solution to secure Cloud computing. Methods: Fog computing is one of the solutions created by Cisco and it is defined as the extension of the Cloud Computing paradigm, its distinctive characteristics in the location sensitivity, wireless connectivity, and geographical accessibility. Accordingly, this research offers an efficient user authentication scheme for Cloud computing by designing the user authentication and access control at the Fog level where, a client-based user authentication methodology has been introduced to confirm identity of the user at client-side to access the Cloud which will enhance the reliability and rate of trust in Cloud computing environments. The system currently being proposed is implemented on mobile devices using an application connected to a Fog node which is further connected to the Cloud node. Findings: In overall, the analysis of the suggested scheme shows that, designing this user authentication and access control model will enhance the security and rate of trust in Cloud computing environments as an emerging and powerful technology in various industries. Application: By incorporating the secured scheme of authentication, Security of Cloud computing environments can be enhanced and protect the system from unauthorized users.Keywords
Authentication, Cloud Computing, Fog Computing, Man-in-Middle, SMSFull Text
- Societal Application of Geophysics as an Aid to a Rescue Operation at Jaipur
Abstract Views :189 |
PDF Views:0
Authors
Affiliations
1 CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 606, IN
1 CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad - 500 606, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 2 (2012), Pagination: 155-160Abstract
Geophysical techniques are normally employed to explore the subsurface and determine the anomalies but they are always much larger in dimension. However, a very precise measurement was needed to pin point a misaligned horizontal tunnel made at 47 m depth to intercept an old bore well and rescue a four year child fallen accidently on 9th November at Jagatpura village in Jaipur, India. Due to the greater depth and presence of iron casing, electric power, etc., no equipment could work to determine the orientation of the tunnel that has lost its direction. The dimension of the site and many other constrains didn't allow conventional geophysical methods to be used. An innovative method was then designed and successfully applied, which determined 1.92 m deviation of the tunnel end point to the east from the old bore well. The digging was redirected accordingly and the bore well was intercepted. This paper describes the theoretical background, forward simulations and the field experiment of the newly designed geophysical method.Keywords
Tunnel Alignment, Bore Well, Societal Application, Geophysics, Buried Bipole Pole (BBP) Method.References
- BHATTACHARYA, B.B., GUPTA, D., BANERJEE, B. and SHALIVAHAN (2001) Mise-a-la-Masse Survey for an Auriferous Sulphide Deposit. Geophysics, v.66(1), pp.70-77.
- CARDARELLI, E., MARRONE, C. and ORLANDO, L. (2003) Evaluation of Tunnel Stability Using Integrated Geophysical Methods. Jour. Appld. Geophys., v.52, pp.93-102.
- CHANDRA, S. (2006) Contribution of Geophysical Properties. In: Estimating Hydrogeological Parameters Of An Aquifer, Ph.D Thesis, Banaras Hindu University, Varanasi, India.
- CHANDRA, S., ATAL, S., REDDY, D.V., NAGABHUSHNAM, P., MURTHY, N.S.K., SUBRAHMANYAM, K., RANGARAJAN, R., AHMED, S. and DIMRI, V.P. (2006a) Explication of water sprouting phenomenon pbserved in parts of Andhra Pradesh. Jour. Geol. Soc. India, v.68, pp.157-159.
- CHANDRA, S., ATAL, S., MURTHY, N.S.K., SUBRAHMANYAM, K., RANGARAJAN, R., REDDY, D.V., NAGBHUSHANAM, P., MURTHY, J.V.S. AHMED, S. and DIMRI, V. P. (2006b) Oozing of Water in parts of Andhra Pradesh, India. Curr. Sci., v.90, pp.1555-1560.
- DAS, A.R. (1988), Geometry of Superposed Deformation in the Delhi Supergroup of Rocks, North of Jaipur, Rajasthan. In: A.B. Roy (Ed.), Precambrian of the Aravalli Mountain, Rajasthan, India. Mem. Geol. Soc. India Mem. v.7, pp.247-266.
- GUPTA, D., SHYAM, R., AGRAWAL, A.K., BHATTACHARYA, B.B. and BANERJEE, B. (1999) Principles of Mise-a-la-Masse Method and Its Application To Polymettalic Sulphides Deposits of Rajasthan, Jour. Geol. Soc. India, v.53, pp.49-57.
- KETOLA-METTI (1972), Some Points of View Concerning Mise-a-la-Masse Measurements. Geoexploration, v.10(1), pp.1-21.
- LEHMANN, B., ORLOWSKY, D. and MISIEK, R. (2010) Exploration of Tunnel Alignment Using Geophysical Methods to Increase Safety for Planning and Minimizing Risk. Rock. Mech. Rock. Eng. v.43, pp.105-116
- NIMMER, R.E. and OSIENSKY, J.L. (2002) Using Mise-A-La-Masse To Delineate The Migration of a Conductive tracer in partially saturated basalt. Environmental Geosciences, v.9, pp.19-39
- PARASNIS, D.S. (1967) Three Dimensional Electric Mise-a-la-Masse Survey Of An Irregular Lead-Zinc-Copper Deposit in Central Sweden. Geophys. Prosp., v.15, pp.407-437.