University of Khartoum

Assessment of Groundwater in the State of Khartoum Using Water Quality Index

Assessment of Groundwater in the State of Khartoum Using Water Quality Index

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Title: Assessment of Groundwater in the State of Khartoum Using Water Quality Index
Author: Suleiman, Ohaila Awad Elkarim Ibnouf
Abstract: Annually the State of Khartoum faces vertical and horizontal extension due to rapid growth in population. 50% of its total water supply comes from groundwater resources. For this reason, the main objective of this research is to assess the quality of groundwater in the State of Khartoum for drinking and domestic purposes using a technique of water quality index (WQI). There are different formulae for calculating water quality index (WQI) of which two methods were used in this study, National Sanitation Foundation Index (NSF-WQI) and Weighted Arithmetic Index (WA-WQI). This was carried out by collecting groundwater samples from 53 boreholes scattered in Khartoum, Omdurman, Khartoum North districts in January and February 2013. Physical and chemical analysis were carried out to determine the appearance, taste, odor, temperature, pH, turbidity, electric conductivity, total alkalinity, total hardness, total dissolved solids, chloride, fluoride, sulfate, nitrate, iron, calcium, and magnesium using the standard methods. Nine of them were used to calculate their water quality index. The findings of this study revealed that out of 53 boreholes studied using National Sanitation Foundation Water Quality Index (NSF-WQI), found that 91% water samples were fit for human consumption, were 9% of them found to be unfit for human consumption. Whereas, the assessment of water quality for the same boreholes using another index called Weighted Arithmetic Water Quality Index (WA-WQI), found that 82% water samples were fit for human consumption, were 18% of them found to be unfit for human consumption. The assessment of groundwater quality using normal investigation of the physical and chemical properties, statistical analysis, and GIS interpolation, gave approximately similar results when using water quality indices. In this study, this fact renders water quality index (WQI) is a useful tool which summarizes data in a single index to be used to understand the state of groundwater quality. This technique is easy, economic, and quick way to assess the quality of water and facilitates communication with lay person, citizens, and 4Tdecision makers4T. It is therefore, we recommend being use in assessing the quality of groundwater instead of the classical evaluation and also can be applied as well to other water resources.
Description: 180 Pages
URI: http://khartoumspace.uofk.edu/handle/123456789/18846
Date: 2016-02-10


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