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Zoning of Nitrite and Nitrate Concentration in Groundwater Using Geografic Information System (GIS), Case Study: Drinking Water Wells in Yazd City

引用

Journal of Geoscience and Environment Protection 2016年第3期4卷 91-96页

作者： Reza Ali Fallahzadeh Seyed Ali Almodaresi Mohamad Mehdi Dashti Ahmad Fattahi mojtaba sadeghnia Hadi Eslami Rasoul Khosravi Roya Peirovi Minaee Mahmoud Taghavi Department of Environmental Health Engineering Faculty of Public Health Shahid Sadoughi University of Medical Sciences Yazd Iran Department of GIS & RS Engineering College Yazd Branch Islamic Azad University Yazd Iran Department of Occupational Health Engineering School of Public Health Shahid Sadoughi University of Medical Sciences Yazd Iran Department of Environmental Health Engineering Zabol University of Medical Sciences Zabol Iran

Studies have demonstrated that the presence of nitrate and nitrite in drinking water can cause some disease such as cancer and blu baby in the infant. The Environmental Protection Agency (EPA) has since adopted the 10 mg/L standard as the maximum contaminant level (MCL) for nitrate-nitrogen and 1 mg/L for nitrite-nitrogen for regulated public water systems. Given the importance of nitrate and nitrite in drinking water as well as GIS ability in spatial analysis of various factors in the groundwater, this study aimed to evaluate concentration of nitrate and nitrite in the drinking water wells of Yazd using two IDW (Inverse Distance Weighting) and Kriging models. In this descriptive study, the applied data on the water quality of underground water of Yazd Environmental Health Office and the average annual nitrate and nitrite in 2015 were related to 24 wells in the studied area. The nitrate and nitrite rate in groundwater in wells was compared to the standard amount of Institute of Standard and Industrial Researches and then was analyzed via Arc GIS software using IDW and Kriging interpolation methods. The mean concentration of nitrate was 17.62 ± 3.08 mg/l and for nitrite was 0.011 ± 0.003 mg/l in the wells. In the all studied zone, the nitrate and nitrite rate was in the standard range according to the National Standard of Iran (No. 1053). In this study, Kriging interpolation method was more efficient than IDW method.

关键词： Drinking Water Nitrite and Nitrate Concentration Geographic Information Systems Interpolation

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