Journal Articles

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Author: search.filters.author.Venkat Reddy, D.

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    A review of technological development in water hazards control in China coalmines
    (CAFET INNOVA Technical Society 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2016) Gui, H.; Venkat Reddy, D.; Sun, L.
    The complex hydrogeological conditions in China coalmines have created a number of inherent water hazards. In the over 60 years of efforts in water hazards control, rich experiences have been accumulated in technology engineering. This article focuses on the major development stages and illustrates current applications of the key technologies in hydrological drilling, grouting and water plugging, and geophysical and geochemical prospecting, as well as the direction for future development, which can provide reference and facilitate communications with coalmines under similar conditions across the world. © 2016 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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    [No abstract available]
    (Geochemical significance of some major and minor elements and their incidence on the environmental conditions of Godavari valley coal fields - A case study) Pavanaguru, R.; Venkat Reddy, D.
    1990
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    A note on the occurrence of landslides in Araku valley and its environs, Visakhapatnam district, Andhra Pradesh, India
    (2010) Balaji, P.; Pavanaguru, R.; Venkat Reddy, D.
    The occurrence of landslides in Araku valley and its environs of Visakhapatnam district of Andhra Pradesh have been studied. The slides occurred in a rugged hilly terrain which is a part of Eastern Ghats Mobile Belt. The slides are predominantly debris slides of varying dimensions and occurred in khondalitic country having slopes of the order of 30°. The debris are composed mostly of scree, soil, boulders and weathered rock. The significant causative factor of triggering slides was manifested through heavy rainfall associated with cyclonic storm. The causes of the slope failure include toe erosion, debris accumulation that resulted in blockade, overtopping and changes in the stream courses. The present paper is aimed to identify damage assessment, magnitude of slides and causes of slides with an attempt to suggest some long term corrective and control measures in the area. © 2010 Cafet-Innova Technical Society.
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    Air quality assessment of Dhanbad District, India - A case study
    (2010) Anantharamu, A.; Singh, G.; Venkat Reddy, D.
    Ambient air pollution status in Dhanbad district is studied and presented in this article. The selection of Dhanbad is made considering its importance and the nature of activities taking place around the district. For the assessment of ambient air quality in Dhanbad, the following five locations were chosen: Main Gate of Indian School of Mines(ISM), Dhanbad: It is a site representing purely commercial activities and road traffic. Bankmore: It is one of the busiest marketing centres of the district and is surrounded by residential areas. All the vehicles going to Bokaro pass by this place and thus the traffic density is pretty high. Kusunda: It is a place 10.9 kilometres from Dhanbad Railway Station. It is just beside one of the coal mines, hence, all vehicles going to the mine passes through this place. Steel Gate: It consists of a small market. Trucks and other heavy vehicle are more frequent during night as this road connects to a highway. ISM Admin Block: It can be considered as a sensitive area since it is a very calm place where the usage of vehicles is minimum throughout the day. Monitoring of ambient air quality is done following the standard procedure prescribed in IS: 5182. In addition, the concentration of lead, zinc, cadmium, copper, manganese and iron metals in SPM is also monitored. The ambient air quality assessment was done in the month of June, 2009. The concentration of SPM was higher than the permissible limit in three locations namely ISM Main Gate, Bankmore and Steel Gate, while it was less than the permissible limit in other two locations, ISM Admin Block and Kusunda. Since the generation of SPM was mainly due to vehicular traffic it was expected to cross the limit in the above mentioned three locations as density of vehicular movement is very high. © 2010 CAFET-INNOVA TECHNICAL SOCIETY.
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    Identification of Artificial recharge sites in hard rock terrain using RS and GIS in Chintapally Mandal, Nalgonda District, Andhra Pradesh, India
    (2010) Raju, A.; Reddy, A.G.S.; Venkat Reddy, D.
    A study has been undertaken to identify the favorable areas for artificial recharge in Chintapally mandal in Nalgonda district, Andhra Pradesh. Geographical Information System (GIS) and Remote Sensing technology contributes an efficient and effective result oriented methods for studying the occurrence and movement of groundwater resources. Integration of various thematic layers such as geomorphology, slope, soil types, lineament density, and drainage density have been used to identify the suitable zones for the artificial recharge in the study area. For identifying the suitable zones, weightage and ranking scores were assigned to each thematic layer then using ARC/INFO GIS software, the above themes have been integrated and the areas suitable for artificial recharge have been identified using spatial analysis tools from GIS environment. The favorable areas for artificial recharge have been categorized into Very Good, Good, Moderate to Good, Moderate, Poor to Moderate and poor for recharge in the study area. © 2010 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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    Correlation between Petrographical and engineering properties of Ilkal granites, Karnataka
    (CAFET INNOVA Technical Society 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2011) Venkat Reddy, D.; Santosh, H.G.; Priyanka, K.
    Granitic rocks show a variety of engineering properties that may affect quarrying operations, slope stability, mining and the use of rock as a structural as well as architectural material. In present investigation, correlation analysis is carried out for experimental results to study the influence of mineralogical and textural characteristics on physical and strength properties using SPSS software. A variety of granitic rock samples from different parts of Ilkal were subjected to study petrographical and then same samples were tested to determine the specific gravity, bulk and dry density, water absorption, porosity, P-wave velocity, rebound hardness, point load strength index, uniaxial compressive strength and tensile strength. The study revealed that a petrographical characteristic like grain size, mineral composition and the bonding between each mineral of granitic rocks plays a major role in contributing the strength parameters. © 2011 Cafet-Innova Technical Society. All rights reserved.
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    Association of chlorophyll in a multi-parametric shallow marine environment off the Karnataka-Kerala coast
    (2011) Raghavan, B.R.; Shylini, S.K.; Deepthi, T.; Kumaraswami, M.; Ashwini, S.; Chauhan, P.; Raman, M.; Venkat Reddy, D.
    Cluster analysis is a useful data analyzing method to obtain detailed information on the state of the shallow marine environment. The objective of this analysis is to appreciate the clustering patterns of the data of case II shallow marine environment of the eastern Arabian Sea. R-mode cluster analysis was resorted to appreciate the relation of the physical, chemical and biological oceanographic parameters represented as dendograms. A set of 14 parameters were retrieved from seven seasons of the coastal waters from Bekal (North Kerala) to Karwar (North Karnataka). This study exhibits diverse clustering patterns reflecting the heterogeneous behavior of the surface waters of the shallow Arabian Sea enforced by the physical, chemical and biological oceanography of the shallow marine environment. © 2011 CAFET-INNOVA technical society. All right reserved.
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    Heterogeneous microbial oceanographic environments: Application of GIS technology in deciphering of microenvironment scenarios off the central west coast of India
    (2011) Raghavan, B.R.; Nayak, S.R.; Shylini, S.K.; Deepthi, T.; Sadatipour, S.M.T.; Chauhan, P.; Srinivasakumar, T.; Lotliker, A.; Venkat Reddy, D.; Kumaraswami, M.; Ashwini, S.; Nisaj, M.
    In the vast oceanic microbial environment of 2468.83km 2, GIS modeling techniques involving sixty query steps, enabled the deciphering of Microenvironments as low as 1.19km 2 to 38.6 km 2 for the summer of 2004 and in case of summer 2005 where 84 query steps were involved to decipher Microenvironments of 10.55km 2 to 25.94km 2. Thirtythree sampling stations were established between Betul to Ankola off the central west coast of India accounting for a spatial coverage of 2468.83km 2. GIS query-modeling investigation was carried out using spatial layers of depth, optical parameters (k-Irradiance attenuation Coefficient, c-Beam attenuation coefficient), sediment size parameters (Sediment Mean Size and Sediment Sorting) and Benthic Foraminifera Suborders (Rotaliina, Textulariina, Miliolina, Lagenina). Foraminifera have been used as a surrogate parameter. However, any microbial parameter could proxy for foraminifers providing for the numerical deciphering of microenvironments. This is suggestive of the assimilation of GIS technology for a better appreciation of microbial oceanography. © 2011 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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    Neotectonic evolution of Coastal Rivers of Mangalore, Karavali Karnataka, India
    (2011) Ravindra, B.M.; Venkat Reddy, D.
    The geomorphic evolution of Mangalore is intimately influenced by Neo-tectonic activities that affected the West Coast and peninsular India that led to the upliftment of Sahyadri Range. Mangalore pediplain has preserved signatures of (1) An older cycle of River system that existed prior to the rise of Sahyadri and (2) Several phases of migration paths of the West flowing Sahyadri Rivers, reflecting geomorphic changes in the pediplain in response to the tectonic strains generated during the rise of the Sahyadri range and northward drift of the Indian subcontinent. The compressional stress derived from the phenomenon of Sea floor spreading is manifested in the Karavali pediplain, in the form of EW and NNW intersecting transform faults that activate periodically and trigger microseismic disturbances severe sea erosions or landslides under adverse hydrological conditions. Similarly under the regime of compressional stress, the Mangalore pediplain evinces evidences of sequential development of anticlinal upwarps that broke into horsts and grabens separated by escarpments. The Holocene fluvial evolution of Mangalore consisted of migration of the two Rivers in opposite directions with progressive passage of time in the Holocene. Fluvial geomorphology of Mangalore has also preserved evidences that substantiate shifting of trans-peninsular Mulki - Pulicat Ridge Axis from its original position northwards. The ongoing structural disturbances and micro-seismic and allied recent neo-tectonic activities imply that the processes responsible for the creation of the Sahyadri range have not died down yet and are very much in attendance even today. © 2011 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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    Assessment of water quality of river Ganga along ghats in Varanasi city, U. P., India
    (2011) Thomas, T.; Mishra, M.; Thomas, H.; David, A.A.; Bharose, R.; Venkat Reddy, D.
    Assessment of water quality was done in holy River Ganga district of Varanasi, (U.P.) India in 2009. Water samples were collected from fives different sites namely (S 1)- Samne Ghat, (S 2)- Assi Ghat, (S 3)- Harishchandra Ghat, (S 4)- Dasaswamedh Ghat, (S 5)- Dr. Rajendra Prashad Ghat. The Ganga, one of the world's major rivers, has been venerated as the holiest and is bound with countless beliefs and faiths especially in India and adjacent countries. Its water has traditionally been regarded as pure and holy in nature gift to human. Recent experiences however do not warrant such complacency. The water resources are strained to a non-sustainable level due to rapid population growth, urban development, industrialization; livestock and power production on the Ganga Ghats at Varanasi city. The severe pollution stress and causes to which its water is subjected to the contents and quality of water and possible remedial measures. According to the result obtained by analyzing various Physico-chemical parameters of Ganga river in Varanasi City, maximum BOD recoded in (S 2)- Assi Ghat and minimum in (S 1)- Samne ghat whereas maximum DO was observed in Samne Ghat and minimum in (S 2)- Assi Ghat during Jan to March 2009 period respectively. On the basis of our experimental results it can be concluded that (S 2)- Assi Ghat exhibited higher pollution index than other ghats due to higher values of Turbidity, pH, BOD, Hardness, Alkalinity and Nitrate disposal occurring at (S 2)- Assi Ghat as well as disposal of industrial sewage in the (S 2)- Assi Ghat. Regular monitoring of Ganga river water quality is necessary to have a check on surface water quality for the sake of human life & to maintain a balanced aesthetical value of religious. We have to restore the environmental quality of Ganga which is amended by policy makers of Indian constitution. © 2011 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.