Recent Articles-IJES

Water quality indices used for surface water vulnerability assessment
Author(s)- Bharti N, Katyal.D

ABSTRACT

Assessment of water quality can be defined as the analysis of physical, chemical and biological characteristics of water. Water quality indices aim at giving a single value to the water quality of a source reducing great amount of parameters into a simpler expression and enabling easy interpretation of monitoring data. In this study, various water quality indices (WQI) used for assessing surface water quality are discussed. As different National and International Agencies involved in water quality assessment and pollution control defines water quality criteria for different uses of water considering different indicator parameters, so there are numerous WQI specific to any region or area.  An attempt to cover all different water quality indices developed worldwide, their background and application area has been made here. In this context, this paper displays a comparative study of many indices and detailed out eight WQI’s perceived as simple, basic and most important indices for water quality assessment. Their mathematical structure, set of parameters, calculation, aggregation formula and flaws have also been detailed out.

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Recent Articles-IJES

Assessment of water quality in Trichy City, Tamil Nadu, India
Author(s)- Muthukumar.S et.al.,

ABSTRACT

During the last several decades, human economic activities, especially input of anthropogenic pressure have a trend of changes in the Earth and Ecosystem consuming ever increasing amounts of fresh water. Its availability at a spot is largely predetermined by the climatic and geological conditions.  This study has made a systematic approach to get an idea about hydrogeochemistry of the groundwater present in the area. The region is denser with agricultural activities and industrial impact. The waters of this region is comparatively unpolluted except in few locations and weathering of minerals present in rocks were determined to be the chief factor in controlling the water chemistry of the region.  An estimate on the available sources of water and need was done determine the sustainable management of water. Declining quality and quantity of water supply of the area can be attributed to the overexploitation of water and improper management of the existing resource, which needs immediate intervention. The hydrogeochemical studies of the region points out that, the present status is well within the considerable limits except for few samples.

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Recent Articles-IJGGS-GIS based Groundwater Quality Mapping in Paravanar River Sub- Basin, Tamil Nadu, India

ABSTRACT

Water, the precious gift of nature to human being, polluted day-by-day with increasing urbanization. Although three-fourth of earth is being surrounded by sea only a little portion of it can be used for drinking purpose. The study area Paravanar basin lies in the Cuddalore District of Tamil Nadu. The area is located in the survey of india toposheets No’s 58M/6, 58M/7, 58M/10&11, of the year 2003 in 1:50,000 scale lying between the longitude 11º18’to11º45’ and latitude 79º18’ to 79º45’. The Geo-graphical extent of Paravanar sub-basin is 880 sq km. It is bounded on the north by Gadilam river basin, in the south by Vellar basin, on the east by Bay of Bengal. The study area is typically covered by sedimentary rock types of Cretaceous to Recent age. Though the basin receives moderate to heavy rainfall, it frequently faces water scarcity problems as well as water quality problems in some specific areas. Hence, a GIS based groundwater quality mapping has been carried out in the region with the help of data generated from chemical analysis of water samples collected from the basin. An attempt has been made to study on the quality of ground water for the Villages falling in the Paravanar Sub Basin to interpolate major ions concentration in groundwater by using ARC/view GIS software. Major elements thematic maps on Calcium, Magnesium, Sodium, Potassium, bicarbonates, chlorides and sulphates were prepared from the Hydrochemistry data. Different classes in thematic maps were categorized as (i) good (ii) Moderate and (iii) poor. In the study area sulphates are found to be within prescribed limit for drinking purpose.

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Recent Articles- IJES

Drinking water quality management through correlation studies among various physico-chemical parameters: A case study
Author(s)- Navneet Kumar, D.K. Sinha

ABSTRACT

Statistical regression analysis of twelve data points of underground drinking water of IM2 hand pumps at Moradabad, India was carried out to study the correlation between various physico-chemical parameters. Twelve water quality parameters of water of all sites were estimated following standard methods and procedures of sampling and estimation. Comparison of estimated values with W.H.O. standards revealed that water of study area is polluted and water quality management is urgently needed. Regression analysis of these data points suggests that conductivity of drinking water is an important parameter and it is significantly correlated with ten parameters out of twelve water quality parameters studied. It may be suggested that drinking water quality can be checked effectively by controlling the conductivity of water. Present study may be treated as one step ahead towards the drinking water quality management.

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Recent Articles- IJES

Assessment and Spatial Distribution of Quality of Groundwater in Zone-II and III, Greater Visakhapatnam, India Using Water Quality Index (WQI) and GIS
Author(s)- Swarna Latha.P , Nageswara Rao.K

ABSTRACT

Assessment and mapping of quality of groundwater is an important quantity, because the physical and chemical characteristics of groundwater determine its suitability for agricultural, industrial and domestic usages. The present study appraises the groundwater quality of Greater Visakhapatnam, Zone II and III areas with the estimation of water quality index and coupled with GIS technology. Inverse distance weighted (IDW) raster interpolation technique of spatial analyst module in ArcGIS software has been used to generate the spatial distribution of water pollutants of constituents. Based on the analysis, most of the area under study falls in moderately polluted to severely polluted zone. The results revealed that the groundwater was not suitable for drinking purpose in most of the areas due to the influence of sewage, saltwater intrusion, industrial and high urban concentration.

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