Ponniah Raju

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  Available from: Ponniah Raju

  Article: Spatial Analysis of Groundwater Quality Investigation in North Chennai, Tamilnadu, India

  A Ponniah Raju, S N Chandrasekar, Saravanan
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  ABSTRACT: Chennai is one of the major metropolitan cities in India and is situated in Southeastern coast of Indian peninsular. Part of its drinking water need is met by surface and remaining from Groundwater resources. Both surface and ground water are the most vital source for domestic, industrial and agricultural purposes. The quality is more important than quantity. A part of North Chennai has been selected for this study. In the study area twenty six samples (open wells and bore wells) were analyzed for geochemical variations and quality of groundwater during pre and post monsoon periods. The following thematic maps have been prepared Viz. Total Dissolved Solids, Hardness, Corrosivity ratio, Chloride / Bi-carbonate ratio, Stuyfzard's Classification, and salinity using GIS. Comparison of geochemical results with World Health organization and Indian standard Institution drinking water standards indicates that all ground water samples are not potable for drinking purposes. In some location during pre monsoon period water quality is above the desirable limit and during post monsoon period the water is potable. Many locations seawater intrusion occurred. The study reveals that quality of ground water changes because of addition of rainwater into the groundwater regime through infiltration. Introduction Groundwater is the most indispensable and precious natural resources, expected to be free from pollution. However, water is often polluted by various ways. Water is essential for human existence and propagation of all biotic life and is the key to socio – economic development and quality of life. A world water development report of the United Nations had categorized India the Worst countries of poor quality of water, as well as their ability and commitment to improve the situation. As official agencies pursue rainwater – harvesting programme, there is reason for average Chennai resident to feel jittery about –an alarming decline in groundwater quality, evidence of which comes from case study on "saltwater intrusion in coastal aquifers of Chennai city" by the C.P.R Environmental Education Centre. Hydrogeochemical investigations of groundwater in North Chennai results indicate the potability and non-potability of water and suitability and unsuitability of groundwater for domestic purposes. Study Area Chennai is one of the major metropolitan cities and it is situated in southeastern coast of Indian peninsular. Chennai is a coastal city, still having remnants of higher sea levels in the geological past in the form of back waters, filled lagoons etc. Groundwater forms an important component of the water supply to the city, as the piped water supply is inadequate to meet the requirements. The total population of Chennai city is 42,16,268 lakhs according to 2001 census. The base map (Fig.1) has been prepared in 1:50,000 scale and converted in to a digital format using GIS software and validated with field checks. Location and Extent The study is located between 80 ° 14'3'' and 80 ° 18'15' East longitude and 13 ° 03'15'' and 13 ° 08'36'' North latitude. The total area of the study area is about 42.31 Sq.km. This area falls in survey of India toposheets 66C/ 4 & 8. The geomorphology of the study area consists of coastal plain, Beach and Beach Ridges and sedimentary High Ground (< 80 m). Drainage of the area consists of River, stream, canal, mini and micro watershed area. The land use/land cover of the study area consists of town and cities, plantation and water logged Area. Climate Chennai experiences a very hot tropical climate. The temperature variation is very less between winters and summers. The proximity to sea makes atmosphere very heavy and humid. The summer is very sultry and hot while the winter is warm. The maximum temperature during summer reaches about 45 º C and the minimum temperature during winter is around 25 º C.
  12/2012; 1:1-6.
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  Article: Application of Gps in Fisheries and Marine Studies

  C Hentry, S L Rayar, S Saravanan, N Chandrasekar, A Ponniah Raju, K Kulathuran
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  ABSTRACT: In past decade the rapid Development of Information Technology and Management system has brought the information revolution all over the world. An emerging field of Geo-informatics is playing an effective role in this revolution. Geo-informatics, as an integration of GIS, GPS and remote sensing, is becoming popular with its diversified fields of applications. This paper focuses on the GPS as a tool to study the Geo-informatics on fisheries and marine studies. It covers the satellite based navigation system, location, Navigation, tracking, mapping and timing, GPS receivers, modernization and future scope of the technology. This paper discusses the real world applications of GPS in fisheries and marine studies.
  11/2011; 2.