scholarly journals Assessing the Impact of Climate Change on Groundwater Quality of the Shallow Coastal Aquifer of Eastern Dahomey Basin, Southwestern Nigeria

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 224 ◽  
Author(s):  
Jamiu A. Aladejana ◽  
Robert M. Kalin ◽  
Philippe Sentenac ◽  
Ibrahim Hassan
Keyword(s):  
Climate Change ◽  
Groundwater Quality ◽  
Water Samples ◽  
Coastal Aquifer ◽  
Dry Season ◽  
Seasonal Effect ◽  
Biogeochemical Process ◽  
Southwestern Nigeria ◽  
Dahomey Basin

Despite the increasing interest in climate change and water security, research linking climate change and groundwater quality is still at an early stage. This study explores the seasonal effect of the change in biogeochemical process for the redox-sensitive ions and metals Fe2+, Mn2+, SO42−, and NO3− to assess the groundwater quality of the shallow coastal aquifer of Eastern Dahomey Basin in southwestern Nigeria. Field physicochemical measurement of EC, pH TDS, Eh, salinity, temperature, and the static water level (SWL) was carried out on 250 shallow wells; 230 water samples were collected for analysis between June 2017 and April 2018. A spatial distribution map of these ions and metals showed an increasing concentration in the dry season water samples compared to those of the wet season. This higher concentration could be attributed to change in the intensity of hydrochemical processes such as evaporation, redox, and mineral precipitation. Results of linear regression modelling established significant relationships between SWL, SO42−, NO3−, Fe, and Eh for both wet and dry seasons with the p-value falling between 75% and 95%, which can also be seen in the plots of Eh/ORP against Fe2+, Mn2+, SO42−, and NO3−. These results revealed the influence of the redox process for both seasons, while also having a higher impact in the dry season while variation of concentration revealed decrease with increase in depth, which could be attributed to a decrease in well hydraulic properties and aeration. An Eh-pH geochemical diagram revealed NO3− as the controlling biogeochemical process over Fe in most of the sample wells. Concentrations of NO3−, Fe, and Mn are above the World Health Organization’s (WHO) standard for drinking water in most water samples. This study has established the link between climate change and groundwater quality in shallow coastal aquifers and suggested the need for strategic groundwater management policy and planning to ameliorate groundwater quality deterioration.

scholarly journals Investigating Groundwater Quality in the Flood Prone Neighborhood Area in Malaysia

2019 ◽  
Vol 51 (2) ◽  
pp. 123
Author(s):  
Nasir Nayan ◽  
Yazid Saleh ◽  
Mohmadisa Hashim ◽  
Hanifah Mahat ◽  
Koh Liew See
Keyword(s):  
Groundwater Quality ◽  
Water Samples ◽  
Dry Season ◽  
Wet Season ◽  
Alternative Source ◽  
Dry Seasons ◽  
Wet And Dry Seasons

The purpose of this study is to compare the quality of groundwater during wet and dry seasons in Malaysia especially in Kuala Krai District which frequently involved in annual monsoon floods and the question whether the wells can be used during floods as well as an alternative source when there are no floods. Six sampling stations were selected using six main parameters which included DO, pH, BOD, COD, TSS and NH3N. The assessment was conducted based on the standards set by Malaysian INWQS and the classification of WQI. The results of the analysis showed that most of the water samples taken during the wet season had concentration values that did not meet the DOE standards such as the DO, BOD, and NH3N parameters. Based on the WQI classification, majority stations during the wet season were in moderately contaminated except for station T6 which was clean. On the contrary, during a dry season were found to be clean except for station T1 which was moderately contaminated.

scholarly journals Evaluation of Groundwater Quality of Selected Boreholes in Ohaozara and Ivo Council Areas of Ebonyi State, Nigeria

2016 ◽  
Vol 59 (1) ◽  
pp. 43-51
Author(s):  
Omaka Ndukaku Omaka ◽  
Ifeanyi Francis Offor ◽  
David Obasi Igwe ◽  
Ewuzie Ugochukwu
Keyword(s):  
Groundwater Quality ◽  
Water Samples ◽  
Standard Methods ◽  
Who Standards ◽  
One Way Anova

Groundwater quality in study areas was evaluated by measuring the physicochemical parametersincluding selected ions in water samples collected from 12 boreholes in Akaeze, Okposi and Uburu townsof Ebonyi State, Nigeria in April, 2013 and analysed using standard methods. Results obtained showedthat, except for As5+ content, all other parameters investigated fall within WHO standards for potable water.Regression analysis showed that conductivity, SO4 2- and As5+ levels are important variables in predictingthe TDS values of the samples while NO3-, Cl-, PO4 3- and TDS are important in predicting the As5+ contentof the water samples. One-way ANOVA at P < 0.05 showed Fcal (1.862) > Ftab (0.619), implying a significantdifference between the parameters for all locations.

scholarly journals Seasonal variation in quality of Louhajong river water, Tangail

2016 ◽  
Vol 28 (1) ◽  
pp. 9-16
Author(s):  
Md Rakib Hasan Sarker ◽  
Asadul Islam ◽  
Ariful Islam ◽  
Md Mahbubul Hoque ◽  
Shimul Roy
Keyword(s):  
Seasonal Variation ◽  
River Water ◽  
Water Samples ◽  
Dry Season ◽  
Fish Culture ◽  
Chemical Parameters ◽  
Wet Season ◽  
Physico Chemical ◽  
Standard Level

Water samples were collected from three points of Louhajong river (Dighulia, Kagmari Bridge and Oloa) to see the seasonal variation in physico-chemical parameters. The results revealed that some of the parameters such as TDS, alkalinity and acidity have exceeded the standard level in dry season in all of the points, which are unsuitable for different purposes including fish culture. During dry and wet seasons the highest concentrations of BOD was recorded as 2.0 and 0.8 ppm at Kagmari Bridge (point-2) respectively. DO ranged from 1.4 to 3.1 and 2.4 to 3.8 ppm during dry and wet seasons. Maximum and minimum EC was recorded as 890 and 130 ?s/cm at Dighulia (point-1) during dry and wet seasons. The results suggest that at wet season Louhajong river may be suitable for fish culture and other purposes.Bangladesh J. Sci. Res. 28(1): 9-16, June-2015

Ecological monitoring of livestock complexes on groundwater quality (on the example of the pig breeding farm № 11 JV LLC "Nyva Pereiaslavschyny")

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
V. Serdiuk ◽  
◽  
V. Maksin ◽  
Keyword(s):  
Groundwater Quality ◽  
Water Samples ◽  
Negative Impact ◽  
Groundwater Resources ◽  
Human Consumption ◽  
Modern Approach ◽  
Protection Zone ◽  
Quality Of Water ◽  
The Impact

Agriculture, especially livestock, is rated as one of the most polluting industries in the world. In the other hand there is a modern approach to the technology implementation, and is this true that with its usage the impact on the environment is so critical and inevitably leads to environmental catastrophe. It is important to investigate and scientifically substantiate the impact of modern livestock complexes on the environment, especially on groundwater resources objectively,. And only after a number of studies conducted on pig farms with a capacity of 30 and 50 thousand heads per year it would be possible to determine next: is livestock an object of ultra-intensive pollution, or it is an object that does not have a significant negative impact on the environment and is also an economic and food lever of the country. The research was conducted on the example of the company JV LLC "NYVA PEREIASLAVSCHYNY" that is located in two districts of Kyiv region – Brovarskyi and Boryspilskyi. The sanitary protection zone size is 1500 meters to the nearest residential development (MINISTRY OF HEALTH OF UKRAINE, 1996). Projects to reduce the sanitary protection zone have not been developed as there is no need for it. Research of water quality was performed according to State Sanitary Regulations and Rules “Hygienic Requirements to Quality of Water Intended for Human Consumption” “2.2.4-171-10” (State Water Agency of Ukraine, 2010). It was conducted on samples that were taken from 4 artesian wells that are located on the territory of the pig breeding farm № 11. The aim of the research is to identify the impact of the pig breeding farm’s № 11 activity on the underground aquifer and surface water body. To reach this target water samples were collected according to the requirements established in the conclusion on environmental impact assessment from wells in the villages and river. Studies that were conducted during 2020 showed that the quality of water in wells meets the requirements for drinking water. Water samples from wells and ponds showed deviations from the norm up to 10 times. Previous studies did not set a negative impact of the pig breeding farm № 11 on groundwater quality.

scholarly journals Temporal changes in groundwater quality of the Saloum coastal aquifer

2017 ◽  
Vol 9 ◽  
pp. 163-182 ◽  
Author(s):  
Ndeye Maguette Dieng ◽  
Philippe Orban ◽  
Joel Otten ◽  
Christine Stumpp ◽  
Serigne Faye ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Coastal Aquifer ◽  
Temporal Changes

scholarly journals Origin and Residence Time of Groundwater in the Shallow Coastal Aquifer of Eastern Dahomey Basin, Southwestern Nigeria, Using δ18O and δD Isotopes

2020 ◽  
Vol 10 (22) ◽  
pp. 7980
Author(s):  
Jamiu A. Aladejana ◽  
Robert M. Kalin ◽  
Ibrahim Hassan ◽  
Philippe Sentenac ◽  
Moshood N. Tijani
Keyword(s):  
Residence Time ◽  
Vadose Zone ◽  
Major Ions ◽  
Dry Season ◽  
Global Network ◽  
Shallow Aquifer ◽  
Seasonal Effect ◽  
Water Types ◽  
Groundwater Samples ◽  
Dahomey Basin

This study employed stable isotopes of δ18O and δ2H in conjunction with other hydrological parameters to understand the origin, inferred residence time, and seasonal effect of groundwater in the shallow aquifers of the eastern Dahomey Basin. A total of 230 groundwater samples (97 in the wet season and 133 in the dry season) were collected from the borehole and shallow aquifer between May 2017 and April 2018. Groundwater analysis included major ions and δ18O and δ2H, isotopes data in precipitation from three selected Global Network of Isotope in Precipitation (GNIP) stations across West Africa, Douala in Cameroon, Cotonou in Republic of Benin, and Kano in Nigeria were used in comparative analysis. Results of the hydrochemical model revealed Ca-HCO3 and Na-Cl as dominant water types with other mixing water types such as Ca–SO4, Ca–Cl, Na–SO4, and K–Mg–HCO3, which characterised early stage of groundwater transformation as it infiltrates through vadose zone into the aquifer. δ18O and δ2H precipitation data from the three stations plotted along with the groundwater samples indicate recent meteoric water origin, with little effect of evaporation during the dry season. The plot of Total Dissolved Solids (TDS) against δ18O showed clustering of the water samples between the recharge and the evaporation zone with dry season samples trending towards increased TDS, which is an indication of the subtle effect of evaporation during this period. Tracing groundwater types along the flow paths within the basin is problematic and attributed to the heterogeneity of the aquifer with anthropogenic influences. Moreover, a comparison of the δ18O and δ2H isotopic compositions of groundwater and precipitation in the three selected stations, with their respective deuterium excess (D-excess) values established low evapotranspiration induced isotope enrichment, which could be due to higher precipitation and humidity in the region resulting in low isotope fractionation; hence, little effect of seasonal variations. The study, therefore, suggested groundwater recharge in the shallow aquifer in the eastern Dahomey Basin is of meteoric origin with a short residence time of water flows from soils through the vadose zone to the aquifers.

scholarly journals Effect of well cleaning and pumping on groundwater quality of a tsunami-affected coastal aquifer in eastern Sri Lanka

2009 ◽  
Vol 45 (7) ◽  
Author(s):  
M. Vithanage ◽  
K. G. Villholth ◽  
K. Mahatantila ◽  
P. Engesgaard ◽  
K. H. Jensen
Keyword(s):  
Sri Lanka ◽  
Groundwater Quality ◽  
Coastal Aquifer

scholarly journals Effects of Depth and Seasons on the Physicochemical and Bacteriological Quality of Selected Well Water Samples in Awka Urban, Anambra State, Nigeria

2020 ◽  
pp. 1-28
Author(s):  
M. U. Orji ◽  
S. C. Onuorah ◽  
M. O. Ifemeje ◽  
O. R. Umeh
Keyword(s):  
Water Samples ◽  
Rainy Season ◽  
Salmonella Typhi ◽  
Dry Season ◽  
Well Water ◽  
Frequency Of Occurrence ◽  
Proteus Vulgaris ◽  
Anambra State ◽  
Dry Seasons

Background: The people of Awka urban show an increasing trend of using well water resulting to unreliable and quality-compromised water supply. Aim: Effects of depth and seasons on the physicochemical and bacteriological quality of selected well water samples in Awka urban, Anambra State was conducted to determine their quality and suitability for domestic uses. A total of thirty shallow and deep well water samples were collected during the rainy and dry seasons. Methods: Physicochemical analysis was carried out using standard analytical methods. The total bacterial count was determined by dilution method. Results: Some of the physicochemical parameters (PH, dissolved oxygen, nitrate, cadmium, lead and arsenic) exceeded the World Health Organization maximum containment levels indicating that the samples were unfit for domestic uses. The bacterial counts ranged from 2.66 to 3.26 logcfu/ml during the rainy season and 2.54 to 3.20 logcfu/ml during the dry season. The total coliform counts also exceeded the W.H.O levels. Citrobacter freundii, Shigella flexneri, Serratia marcescens, Proteus vulgaris, Vibrio cholerae, Salmonella typhi, Pseudomonas aeruginosa, Escherichia coli and Bacillus subtilis were isolated during both seasons and identified using standard analytical procedures. The bacterium that had the highest frequency of occurrence during the rainy season was Citrobacter freundii (16.55%) while Salmonella typhi had the highest frequency of occurrence during the dry season (17.69%) respectively. Proteus vulgaris had the least frequency of occurrence 5.41% and 4.62% during the rainy and dry seasons respectively. The results were analyzed statistically using two-way analysis of variance. Higher bacterial counts were recorded in rainy season and shallow wells than dry season and deeper wells. Conclusion: The presence of these bacteria above admissible limits showed that the water lacked proper water management services and may be harmful to humans. There is therefore a need to monitor the well water quality by employing better sanitary practices and subjecting the waters through various forms of water treatments before use to help prevent disease outbreak.

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