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Anbazhagan, S.
- Criteria and Techniques of Detecting Site Specific Mechanisms for Artificial Recharge - A Case Study from Ayyar Basin, India
Abstract Views :168 |
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Authors
Affiliations
1 Centre for Remote Sensing, School of Earth Sciences, Bharathidasan University, Tiruchirappalli - 620 023, IN
1 Centre for Remote Sensing, School of Earth Sciences, Bharathidasan University, Tiruchirappalli - 620 023, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 50, No 4 (1997), Pagination: 449-456Abstract
The present paper narrates how various types of geological. structural, geomorphological and subsurface geological data have been collected and integrated in various pennutations and combinations to select suitable mechanisms for artificial recharge in Ayyar basin of Tamil Nadu.Keywords
Remote Sensing, Artificial recharge, Groundwater, Tamil Nadu.
- Recent Developments and Opportunities in Exploration Geology and Geoinformatics
Abstract Views :184 |
PDF Views:116
Authors
Affiliations
1 Department of Geology, Periyar University, Salem-636011, IN
1 Department of Geology, Periyar University, Salem-636011, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 70, No 1 (2007), Pagination: 173-174Abstract
No Abstract.Full Text
- Evaluation of Areas for Artificial Groundwater Recharge in Ayyar Basin, Tamil Nadu, India through Statistical Terrain Analysis
Abstract Views :164 |
PDF Views:2
Authors
Affiliations
1 Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
2 Centre for Remote Sensing, Bharathidasan University, Tiruchirappalli-620 023, IN
1 Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, IN
2 Centre for Remote Sensing, Bharathidasan University, Tiruchirappalli-620 023, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 1 (2006), Pagination: 59-68Abstract
The paper presents an approach of selecting suitable areas for artificial groundwater recharge structures through remote sensing and integrated terrain analysis by statistical method. The study area "Ayyar basin" is an aquifer system of gneisses and charnockite litho-Units in Tiruchirappalli district, Tamil Nadu. The area has witnessed a steady decline in groundwater table. Hence, the scope for artificial groundwater recharge was studied in this area with the help of Tamil Nadu State Council for Science and Technology (TNSCS&T). Numerical database was generated for water level, lineament density, slope, drainage density, soil type, thickness of soil, thickness of weathered zone, thickness of fractured zone and depth to bedrock through remote sensing and hydrogeological study. These nine variables were used as input parameters and factor analysis with varimax rotation was carried out. In the factor analysis, the factor in which the variables loaded significantly were considered for further analysis. Using factor scores, the domains where the water level was deeper with decrease of slope and drainage density, and increase of lineament density, thickness of soil, thickness of weathered zone, thickness of fractured zone and depth to bedrock were buffered out. The buffered domains derived from each factor were finally integrated and thus the entire study area was fragmented into a number of domains suitable for artificial recharge. Such statistical output has not only helped to identify the suitable locations for artificial recharge but also indicated their controlling terrain characteristics, thus leading to the prioritization of area for specific method of cost effective recharge.Keywords
Artificial Recharge, Remote Sensing, Lineaments, Statistical Modeling, Ayyar Basin, Tamil Nadu.- Developments of Fractures and Land Subsidence at Kolli Hills, Tamil Nadu
Abstract Views :170 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, Periyar University, Salem-636011, IN
1 Department of Geology, Periyar University, Salem-636011, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 3 (2008), Pagination: 348-352Abstract
Kolli hills is one of the small tourist spots in Tamil Nadu falls in Eastern Ghats. In general, improper land management, intensive weathering and rainfall trigger frequent slope failures and landslide in hill systems. During December 2005, similar slope failure had occuued in the Southeastern part of Kolli hills. Fractures and open cracks had developed along with horizontal and vertical displacements. Continuous heavy rainfall deforestation agricultural practices and obstruction of natural flow are observed to be the causative factors for such failure. Field investigations and other parameters were studied in detail. Abandoning of current agriculture practices and permitting natural flow of the streams are immediate steps recommended for stabilising such vulnerable slope.Keywords
Fractures, Land Subsidence Landslide, Kolli Hills, Tamil Nadu.- Weathering and Landslide Occurrences in Parts of Western Ghats, Kerala
Abstract Views :215 |
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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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