Rural assessment of groundwater quality parameters

A case study of Pepel Northern Sierra Leone

Yaguba Jalloh, K. Sasaki, Abu Bakarr Jalloh

研究成果: ジャーナルへの寄稿記事

抄録

Majority of the population in Pepel depend on groundwater for domestic and other purposes. However, in spite of the high potential of groundwater in this region and the number of boreholes drilled by Aid Agencies, study reveals that there is still a serious problem with adequate availability and quality of groundwater supply. Water samples from 35 selected borehole wells were collected from June – September 2016. Water samples were collected from each well for quality analyses within Pepel, Port Loko districts for Physicochemical and bacteriological analysis. The parameters tested are pH, Temperature, Color, Total Dissolved Solid, Conductivity, Calcium, Nitrate, Manganese, Chloride, Fluoride, Iron, Copper, Turbidity and Sulfate. The result obtained was compared with World Health Organization (WHO) standards for water quality. Results have shown that boreholes in Pepel have high average yield of (2.04 m3/hr. The productivity of the boreholes in Pepel can supply enough water to the locals in the area and that most of the physical parameters are within acceptable WHO limits for drinking water quality. The entire water samples that were analyzed for chemical parameters indicated that the samples did not exceed the acceptable WHO limits. More than half of the borehole water samples 19 (54 %) out 35 boreholes showed lower pH values that are below WHO recommended pH limits of 6.5-8.5, while 17 (46% ) out 35 boreholes fall within WHO recommended pH limits. This shows that many of the sample borehole waters from the study areas indicated a tendency to towards acidity. Thus, these water sources are acidic. The acidity of water may be attributed to marshy and sandy sulphate soils. Acids lower pH and bases increase pH of water. Fluctuation in pH reflects the biological activity and changes in the natural chemistry of waters, as well as pollution. However, 67% of the wells yielded water of good bacteriological quality.
元の言語英語
ページ(範囲)1-7
ページ数7
ジャーナルJournal of Hydrogeology & Hydrologic Engineering
7
発行部数1
DOI
出版物ステータス出版済み - 1 8 2018

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borehole
World Health Organization
groundwater
water
acidity
sulfate
water quality
parameter
well water
water pollution
fluoride
turbidity
aid
manganese
conductivity
water supply
calcium
drinking water
chloride
nitrate

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

これを引用

Rural assessment of groundwater quality parameters : A case study of Pepel Northern Sierra Leone. / Jalloh, Yaguba; Sasaki, K.; Jalloh, Abu Bakarr.

:: Journal of Hydrogeology & Hydrologic Engineering, 巻 7, 番号 1, 08.01.2018, p. 1-7.

研究成果: ジャーナルへの寄稿記事

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abstract = "Majority of the population in Pepel depend on groundwater for domestic and other purposes. However, in spite of the high potential of groundwater in this region and the number of boreholes drilled by Aid Agencies, study reveals that there is still a serious problem with adequate availability and quality of groundwater supply. Water samples from 35 selected borehole wells were collected from June – September 2016. Water samples were collected from each well for quality analyses within Pepel, Port Loko districts for Physicochemical and bacteriological analysis. The parameters tested are pH, Temperature, Color, Total Dissolved Solid, Conductivity, Calcium, Nitrate, Manganese, Chloride, Fluoride, Iron, Copper, Turbidity and Sulfate. The result obtained was compared with World Health Organization (WHO) standards for water quality. Results have shown that boreholes in Pepel have high average yield of (2.04 m3/hr. The productivity of the boreholes in Pepel can supply enough water to the locals in the area and that most of the physical parameters are within acceptable WHO limits for drinking water quality. The entire water samples that were analyzed for chemical parameters indicated that the samples did not exceed the acceptable WHO limits. More than half of the borehole water samples 19 (54 {\%}) out 35 boreholes showed lower pH values that are below WHO recommended pH limits of 6.5-8.5, while 17 (46{\%} ) out 35 boreholes fall within WHO recommended pH limits. This shows that many of the sample borehole waters from the study areas indicated a tendency to towards acidity. Thus, these water sources are acidic. The acidity of water may be attributed to marshy and sandy sulphate soils. Acids lower pH and bases increase pH of water. Fluctuation in pH reflects the biological activity and changes in the natural chemistry of waters, as well as pollution. However, 67{\%} of the wells yielded water of good bacteriological quality.",
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