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Pradeepkumar, A. P.
- Declining Interest in Geology
Abstract Views :208 |
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Affiliations
1 Focal Image (India) Put. Ltd., St. Joseph's Press Building, Trivandrum 695 014, IN
1 Focal Image (India) Put. Ltd., St. Joseph's Press Building, Trivandrum 695 014, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 3 (2000), Pagination: 341-341Abstract
No Abstract.Full Text
- Prof. R. Krishnanath (1938-2007)
Abstract Views :166 |
PDF Views:125
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Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 4 (2007), Pagination: 693-693Abstract
No Abstract.Full Text
- Essential Maths for Geoscientists:An Introduction
Abstract Views :191 |
PDF Views:89
Authors
Affiliations
1 Department of Geology, University of Kerala, Thiruvananthapuram 695 581, IN
1 Department of Geology, University of Kerala, Thiruvananthapuram 695 581, IN
Source
Current Science, Vol 108, No 11 (2015), Pagination: 2107-2107Abstract
No Abstract.Full Text
- Weathering and Landslide Occurrences in Parts of Western Ghats, Kerala
Abstract Views :219 |
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Authors
Affiliations
1 Geological Survey of India, Kerala Unit Manikanteswaram P O, Trivandrum - 695 013, IN
2 Department of Geology, Periyar University, Salem - 636 011, IN
3 Department of Geology, University College, Trivandrum - 695 034, IN
4 Central Groundwater Board, Trivandrum - 695 004, IN
1 Geological Survey of India, Kerala Unit Manikanteswaram P O, Trivandrum - 695 013, IN
2 Department of Geology, Periyar University, Salem - 636 011, IN
3 Department of Geology, University College, Trivandrum - 695 034, IN
4 Central Groundwater Board, Trivandrum - 695 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 78, No 3 (2011), Pagination: 249-257Abstract
The climatic condition of Western Ghats has influenced the process of weathering and landslides in this mountainous tract along the southwest coast of India. During the monsoon period, landslides are a common in the Western Ghats, and its intensity depends upon the thickness of the loose unconsolidated soil formed by the process of weathering. Debris landslides with a combination of saprock, saprolite and soil, indicate the role of weathering in landslide occurrences. This paper reports on how the weathering in the windward slope of Western Ghats influences the occurrence of landslides and the factors which accelerate the weathering process. Rock and soil samples were collected from the weathering profile of hornblende gniess and granite gneiss. The chemical analysis and the calculated Chemical Index of Alteration (CIA) indicate the significant weathering and its possible influence on landslide occurrences in the study area. Mainly, the CIA value of lateritic soil and forest loam indicated the extent of high chemical weathering in this region. Rainfall is the dominant parameter influencing the chemical weathering process. In addition, deforestation, land use practices and soil erosion are some of the other important factors accelerating the weathering process and landslide occurrences in the region. The locations of the previous landslides superimposed on geology and soil show that most of the landslide occurrences are associated with the highly weathered zone, particularly lateritic soil and the 'severe' (rock outcrop) erodability zone.Keywords
Weathering, Landslides, CIA, Western Ghats, Kerala.
References
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- BUMA, J. and DEHN, M. (1998) A method for predicting the impact of climate change on slope stability. Environ. Geol., v.35(2-3), pp.190-196.
- DEEPTHY, R. and BALAKRISHNAN, S. (2005) Climatic control on clay mineral formation: Evidence from weathering profiles developed on either side of the Western Ghats. Jour. Earth System Sci., v.114, pp.545-556.
- DEROSE, R.C., TRUSTRUM, N.A. and BLASCHKE, P.M. (2006) Post-deforestation soil loss from steepland hillslopes in Taranaki, New Zealand. Earth Surface Process and Landform, v.11(2), pp 131-144.
- DOKUZ, A. and TANYOLU, E. (2004) Geochemical Constraints on the Provenance, Mineral Sorting and Subaerial Weathering of Lower Jurassic and Upper Cretaceous Clastic Rocks of the Eastern Pontides, Yusufeli (Artvin), NE Turkey. Turkish Jour. Earth Sci., v.15, pp.181-209.
- FLUENTE, J.D.L., ELDER, D. and MILLER, A. (2002) Does deforestation influence the activity of deep-seated landslides? Observations from the flood of 1997 in the Central Klamath Mountains, Northern California. The evolving PacificNorthwest Landscape: Geomorphic and Ecologic controls, constrains, and conundrums in the Quaternary. May 13-15, 98th Annual meeting Abstracts.
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- LINDSAY, P., CAMPBELL, R.N., FERGUSSON, D.A., GILLARD, G.R. and MOORE, T.A. (2001) Slope stability probability classification, Waikato Coal Measures, New Zealand. Internat. Jour. Coal Geol., v. 45, nos.2-3, pp.127-145.
- NESBITT and YOUNG (1984) Prediction of some weathering trends of plutonic and volcanic rocks based on thermodynamic and kinetic consideration. Goechim. Cosmochim. Acta, v.54, pp.1523-1534.
- OLDHAM, R.D. (1894) The evolution of Indian Geography. The Geographical Jour., v.III(3), pp.169-179.
- PASCOE, E.H. (2001) Physical Geography of the Western Ghats. In: Y. Gunnell and B.P. Radhakrishna, (Eds.), Sahyadri: The great escarpment of the Indian subcontinent. Mem. Geol. Soc. India, no.47(1), pp.67-69.
- PASUTO, A. and SILVANO, S. (1998) Rainfall as a trigger of shallow mass movements. A case study in the dolomites, Italy. Environ. Geol., v.35(2-3), pp.184-189.
- PRICE, J.R. and VELBEL, M.A. (2003) Chemical weathering indices applied to weathering profiles developed on heterogeneous felsic metamorphic parent rocks. Chemical Geol., v. 202, pp.397-416.
- RAJAN, P.K., SANTOSH, M. and RAMACHANDRAN, K.K. (1984) Geochemistry and petrogenetic evolution of the diatexites of Central Kerala, India. Proc. Indian Acad. Sci. (Earth Planet. Sci.), v.93(1), pp.57-69.
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- SAJINKUMAR, K.S. (2005) Geoinformatics in landslide risk assessment and management in parts of Western Ghats, Central Kerala, South India. PhD Thesis (Unpublished). Indian Institute of Technology Bombay, 197p.
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- SOREGHAN, M.J., SOREGHAN, G.S. and HAMILTON, M.J. (2002) Geochemistry and Detrital Zircon Geochronology of Upper Paleozoic Loessite within the Ancestral Rocky Mountains: Implications for Paleoclimate. AAPG Hedberg Conference "Late Paleozoic Tectonics and Hydrocarbon Systems of Western North America, The Greater Ancestral Rocky Mountains" July 21-26 Colorado.
- SUBRAMANYA, K.R. (2001) Origin and evolution of the Western Ghats and the west coast of India. In: Y. Gunnell and B.P. Radhakrishna (Eds.), Sahyadri: The great escarpment of the Indian subcontinent. Mem. Geol. Soc. India, no.47(1), pp.463-473.
- TERLIEN, M.T.J. (1998) The determination of statistical and deterministic hydrological landslide-triggering thresholds. Environ. Geol., v.35(2-3), pp.124-130.
- TREFTHEN, J.M. (1950) Classification of sediments. Amer. Jour. Sci., v.248, pp.55-62.
- VAN ASCH, TH.W.J., DE BRUM FERREIRA, A. and RODRIGUES, M.L. (1999) The role of conditioning and triggering factors in the occurrence of landslides: A case study in the area north of Lisbon (Portugal). Geomorphology, v30, pp.133-146.
- WILSON, R.C. and WIECZOREK, G.F. (1995) Rainfall thresholds for the initiation of debris flows at La Honda, California. Environ. Engg. Geoscience, v.1, pp.11-27.
- ZHOU, C.H., LEE, C.F., LI, J. and XU, Z.W. (2002) On the spatial relationship between landslides and causative factors on Latau Island, Hong Kong. Geomorphology, v.43, pp.197-207.
- Groundwater Potential of a Fastly Urbanizing Watershed in Kerala, India:A Geospatial Approach
Abstract Views :156 |
PDF Views:0
Authors
Affiliations
1 School of Environmental Sciences, Mahatma Gandhi University, Kottayam, IN
2 Centre for Water Resources Development and Management, Kozhikode, IN
3 Department of Geology, Kerala University Campus, Karyavattom, Thiruvananthapuram, IN
1 School of Environmental Sciences, Mahatma Gandhi University, Kottayam, IN
2 Centre for Water Resources Development and Management, Kozhikode, IN
3 Department of Geology, Kerala University Campus, Karyavattom, Thiruvananthapuram, IN
Source
International Journal of Engineering Research, Vol 4, No 10 (2015), Pagination: 578-581Abstract
The 6th order watershed, which hosts Thiruvananthapuram, the capitol city of Kerala State, India,has been studied in terms of groundwater potential, employing Geospatial Technologies. The watershed receives an average annual rainfall of 2600 mm. Geologically, the major part of the watershed is characterized by Khondalites, Charnockites and Migmatites of Archaean age, and the remaining by Tertiary sedimentaries, Miocene and Holocene formations. All these rocks are extensively lateritised. Geomorphology, geology, drainage, fracture systems in hard rocks and the slope of the terrain play a significant role on the accumulation and movement of groundwater in the watershed. The integration of these data sets has been accomplished through Geospatial technology. The basin area has been categorised into four zones, namely, Very high, High, Moderate and Low in terms of groundwater potential. It is estimated that about 35% of the watershed, comes under the very high to high category in terms of groundwater potential and is confined to the less inhabited upstream reaches. Low groundwater potential category dominates in the watershed which covers 40% of the are a characterized by Built up Area, evidently due to the urbanization.Keywords
Watershed, Groundwater Potential, Spatial Information Systems, Urbanization.Full Text
- Tunnel Wells, the Traditional Water Harvesting Structures of Kasaragod, Kerala: Re-Visited
Abstract Views :257 |
PDF Views:82
Authors
E. Shaji
1,
K. V. Sarath
1,
Pranav Prakash
1,
Adithya Pazhoor Abraham
2,
V. Deepchand
1,
V. Kunhambu
3,
A. P. Pradeepkumar
1
Affiliations
1 Department of Geology, University of Kerala, Thiruvanathapuram 695 581, IN
2 Department of Civil Engineering, National Institute of Technology, Calicut 673 601, IN
3 Central Ground Water Board, Kerala Region, Thiruvanathapuram 695 004, IN
1 Department of Geology, University of Kerala, Thiruvanathapuram 695 581, IN
2 Department of Civil Engineering, National Institute of Technology, Calicut 673 601, IN
3 Central Ground Water Board, Kerala Region, Thiruvanathapuram 695 004, IN
Source
Current Science, Vol 118, No 6 (2020), Pagination: 983-987Abstract
Tunnel wells or surangams are less common traditional groundwater harvesting structures of Kasara-god district in Kerala, southern India. These horizontal wells, structurally resembling Qanats, are driven into the laterite plateaus and hills for tens of metres. The status of tunnel wells of Kasaragod is synthesized, the problems and prospects examined to evolve a common strategy for sustainability. Functionally four different types of tunnel wells exist: (1) single tunnel, (2) single tunnel with branches, (3) tunnel system ending in a vertical well, and (4) tunnel system ending in a well with a horizontal outlet. The yield of tunnel wells has reduced over the years and 50% of them are now dry. Single tunnels (types 1 and 2) act as conduits for excessive draining of groundwater from the aquifer system during the rainy season, leading to wastage of groundwater and lowering the water table. The discharge estimates from the 24 tunnel wells indicate that 6653 m3 of groundwater gets discharged from the aquifer per day.To prevent wastage, the mouth of the tunnel wells should be fitted with half shutter gate with a control valve at the bottom. There is an urgent need to create awareness to protect and modify these traditional water harvesting structures for sustainability of water resources.Keywords
Discharge, Groundwater, Kasaragod, Traditional Water Harvesting, Tunnel Wells, Surangam.Full Text
References
- Agarwal, A. and Narain, S., Dying Wisdom: Rise, Fall and Potential of India’s Traditional Water Harvesting Systems, Centre for Science and Environment, New Delhi, 1997, pp. 117–125.
- Nair, G. U., Traditional wisdom in harvesting water. J. Tradit. Folk Pract., 2016, 4(1), 50–53.
- Balakrishnan, K. and Saritha, S., Groundwater Information Booklet of Kasaragod District, Kerala State. Central Ground Water Board, Ministry of Water Resources, Government of India, Trivandrum, 2007, pp. 1–22.
- Padre, S., Farming without pumps. Leisa India, AME Foundation, Bangalore, India, 2008, pp. 34–35.
- Basak, P., Raghavendra Prasad, P. M. and Sreedharan, K. E., Surangams – a traditional water harvesting system in North Mala-bar. Centre for Science and Environment, Thomson Press Limited, Faridabad, India, 1997, pp. 222–223.
- Crook, D., Tripathi, S. and Jones, R. T., The sustainability of suranga irrigation in South Karnataka and northern Kerala, India. In First World Irrigation Forum, Conference Proceedings, Mardin, Turkey, 2013, pp. 50–55.
- Balooni, K., Kalro, A. H. and Ambili, K. G., Sustainability of tunnel wells in a changing agrarian context: a case study from South India. Agric. Water Manage., 2010, 97(5), 659–665.
- Nayak, N. C., Study on age old non-conventional adit/tunnel wells in the lateritic terrain of Kasaragod district, Kerala. Central Ground Water Board, Trivandrum, 2001, pp. 1–20.
- Crook, D., Tripathi, S. and Jones, R. T., An investigation into the age and origin of suranga in the foothills of the Western Ghats of India. Water History, 2015, 7(3), 253–270.
- Halemane, H., Suranga a sustainable water resource. In National Seminar on Water and Culture, Hampi, Bellary, India, 2007, pp.20–25.
- Prasad, P. M. R., Jayakumar, N. S. and Basalt, P., Surangams of Kasargod – an unconventional water harvesting mechanism. Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode, Kerala, 1991, pp. 40–45.
- Nazimuddin, M. and Kokkal, K., Studies on development of surangams as a nonconventional water resource in the Kanhangad block panchayat, Kasaragod district, Kerala. Groundwater Division, Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode, Kerala, India, 2002, pp. 1–50.