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An Assessment of Ground Water Quality in Selected Dug Wells In International Journal of Scientific & Engineering Research, Volume 7, Issue 4, April-2016 1517 ISSN 2229-5518 An Assessment of Ground Water Quality in Selected Dug Wells in Vavuniya Urban Council Limit through Water Quality Index Ravi, V., 1 Herath, G.B.B., 2 Manobavan, M 3 and Sivakumar, S.S., 4 Abstract— An assessment conducted in Vavuniya urban council limit from dug well water sample, the particular council consists nine Girama Niladhari Divisions. This study was assessed selected physio-chemical and biological parameters such as pH, electric conductivity, total suspended solids, total hardness, fluoride, nitrate, nitrate nitrogen, iron, free chlorine and total coli form in 90 dug well water. Totally six Girama Niladhari Division zone water quality index is below 50. This means the water quality is good. Other four Girama Niladhari Division zones water quality index are 92, 64, 63 and 58 respectively. This indicates the water quality is poor. The major reason for lowering water quality is the presence of fecal coli form, which is exceeded its allowable level. Index Terms—water resource in Sri Lanka, urban water supply, dug-well water quality, coliform contamination, water quality index —————————— —————————— 1 INTRODUCTION RBAN development and water pollution are ly groundwater recharging the area. Apart from U highly linked up with the rapid population this there are several bottled water companies development due to uncontrolled human playing a crucial role to full fill the safe water activities. Vavuniya urban council (UC) is one of needs. the transform city in Northern Province can say it’s Within the UC limit, building a house should asso- the mouth of the access to the province. Prolonged ciate with a construction of dug well is inevitable internal conflict in Sri Lanka leads the vavuniya need. Dug wells are shallow from 45 to 60 feet population suddenly increased recently, due to meeting unsaturated aquifers and the saturated that demand for safe water is an important topic aquifer is more than 90 feet the tube wells are here. Most of the people in this area relay on their meeting this depth. After the internal displacement own and public ground water sources such as in mid of 90s and 2009 has created the population open dug well andIJSER tube wells. The government of the district is in significant increase. Considera- institutions and other important buildings located ble amount of people has purchased lands near in the core city have connected with the pipe born town and build their own houses with at least one water. open dug well, without considering the environ- mental norms to protect ground water because the There are more than 4000 domestic open dug construction of most of the individual houses are wells, 34 common open dug wells, more than 100 without obtained a prior approval from local au- common tube wells and around 1600 pipe connec- thorities. tions to serve more than 40% of district population and thousands of daily travelers. And the UC has Nevertheless it’s obvious that the ground water seven minor fresh water irrigation reservoirs for been polluted in some extent by uncontrolled hu- irrigated agriculture as main purpose and indirect- man activity after a booming of population. So it’s necessary to check the water quality to ensure the ———————————————— domestic usage and to predict the level of pollution • 1 Free lance researcher, Sri Lanka, (+94) 777715307 ; before facing an unsafe situation. For this assess- [email protected] ment the UC divided in to 10 GN zones and the number of water sample selected based on the • 2 Senior Lecturer, Department of Civil Engineering. University of Perad- population of the particular zone. eniya, Sri Lanka, PH (+94) 773689838; [email protected] • 3 Senior Lecturer Faculty of Applied Science, University of Jaffna, Sri Lanka 2 STATEMENT OF RESEARCH PROBLEM With regards to pipe-borne water supply, 412 • 4 Head of Department and Senior Lecturer, Department of Civil Engineer- ing, Faculty of Engineering, University of Jaffna, Kilinochchi, Sri Lanka, domestic water connections in year 2006 were in- (+94) 772508730; [email protected] creased to 542 in year 2009 in the UC limits (ava- gare 40 connection per year), clearly indicates, the IJSER © 2016 http://www.ijser.org International Journal of Scientific & Engineering Research, Volume 7, Issue 4, April-2016 1518 ISSN 2229-5518 necessity of pipe borne water connections. As the ing hydrogen bonds. These strong bonds deter- groundwater and the surface water sources in the mine almost every physical property of water and area was in poor state, the National Water Supply many of its chemical properties too. &Drainage Board checking the water quality every Water covers 71% of the Earth's surface on two months before 2006, but now due to many Earth, it is found mostly in oceans and other large constraints, they do not check the Drinking water water bodies, with 1.6% of water below ground in quality. Therefore, to reduce the drinking water aquifers and 0.001% in the air as vapor, clouds shortages it is essential to assess the water quality (formed of solid and liquid water particles sus- of the existing dug wells inside the UC limits to pended in air), and precipitation Saltwater oceans promote the use of dug well water. (Table 1.1 and hold 97% of surface water, glaciers and polar ice 1.2) caps 2.4%, and other land surface water such as rivers, lakes and ponds 0.6% (Shiklomanov, 1999). This study also will look into the root cause of A very small amount of the Earth's water is con- the pollution for grond with in the Vavuniya UC tained within biological bodies and manufactured limits products. Other water is trapped in ice caps, glaci- ers, aquifers, or in lakes, sometimes providing fresh water for life on land BJECTIVES OF THE ESEARCH 3 O R Main objective of this study is to developing a 4.2 Drinking Water Pollutants and Health Haz- water quality index for Vavuniya UC limits by as- ards in UC Areas sessing the selected chemical and biological ground water quality in the area. Almost all the water pollutant has a potential to health concern it may acutely or chronically, but Specific Objective is to assess the selected physio- the water pollutant consist different characters, so, chemical and biological quality of ground water its hazards is different from each other, and affect- through selected dug wells in Vavuniya UC limits. ed concentration is also differs. But some pollution is needs to highly considerable to human con- 4 REVIEW OF LITERATURE sumption. During the globalization all the indus- trial activities mostly oriented within the major cities and their surroundings, so, population of the 4.1 Science of Water cities or Urban Councils were rapidly increasing ‘Water’ is not just a word in our world, it is by- globally. The industrialization activities definitely and-large the very essence of life, simply without affect the surrounding environment including the water nothing happeIJSERning in the world (water is water resources. So, impropper environmental universal solvent). Our living planet consists three plan generating the water pollution. The all gov- major spheres, i.e. atmosphere, lithosphere, hydro- ernment desires to ensure the water security. In the sphere, the hydrosphere consist, solid, liquid and perception of the water, needs to make sure suffi- vapor phases of water. 4.6 billion years ago the cient quality and quantity to avoid disaster a risk, world is a non-living things like other planet in our obviously poor quality water is a barrier to the solar system, because no water in the world, after development activities of any country. certain period water available in our world in three phases, this help to form major water sources in Vavuniya is the entrance of access to the north- the world, like Oceans, rivers, lakes, streams, and ern province Sri Lanka, it has one Urban Council hydrological cycle. All the living things in the (UC), and total land area of the UC is only about world need certain amount of water to fulfill their 21.5km2 (land area is 12793 Ha), 40% of the total life. Water is the solvent, the medium and the par- population (population density 2,476/km2) living ticipant in most of the chemical reactions occurring within the UC limits, this clearly indicating sus- in our environment. tainable water for drinking is a high demanded one. Major water resources within the UC limits of Water is the common name applied to the liquid Vavuniya are (Sivakumar S S, 2002), form (state) of the hydrogen and oxygen com- pound H2O. Pure water is an odor less, tasteless, • Irrigation Schemes clear liquid. Water has some interesting unique • Domestic and Agro dug wells, properties compare to other solvents in the world. • Sallow tube wells, We can freeze it, melt it, boil it and combine it. • Town water supply, Water molecules are attracted to each other, creat- • Community wells. IJSER © 2016 http://www.ijser.org International Journal of Scientific & Engineering Research, Volume 7, Issue 4, April-2016 1519 ISSN 2229-5518 es, to improve the dug well water quality needs to These water resources may get pollution by the be investigating about the water quality, find out activity of the human and natural (underground the pollutant root cause/s and propose suitable geology). Following human activities cause to the management activities (Sivakumar S S, 2002). water pollution within the UC areas (Sivakumar S S, 2008): ATERIAL AND ETHODOLOGY 5 M M • Over exploitation due to the population growth, 5.1 Study area • Urban waste water runoff, • Market waste, The study area of Vavuniya urban council is in • Hospital wastes, fig.
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