Characterization of water chemistry in some communities of the Lower Tano river basin, Ghana, West Africa

被引:3
作者
Edjah, A. K. M. [1 ,2 ]
Banoeng-Yakubo, Bruce [3 ]
Akiti, T. T. [4 ]
Stenni, Barbara [5 ]
Dreossi, Giuliano [6 ]
Doku-Amponsah, K. [7 ]
机构
[1] Univ Ghana, Dept Nucl Chem, Legon, Ghana
[2] Univ Ghana, Environm Res Ctr, Ghana Atom Energy Commiss, Dept Earth Sci, Legon, Ghana
[3] Univ Ghana, Dept Earth Sci, Legon, Accra, Ghana
[4] Univ Ghana Legon, Grad Sch Nucl & Allied Sci, Dept Nucl Sci & Applicat, Accra, Ghana
[5] CA Foscari Univ Venice, Dept Environm Sci Informat & Stat, Venice, Italy
[6] Natl Res Council Italy, Inst Dynam Environm Proc, Milan, Italy
[7] Univ Ghana, Stat Dept, Legon, Accra, Ghana
关键词
Hydrogeochemistry; Isotopic studies; Lower Tano river basin;
D O I
10.1007/s12517-019-4305-4
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The chemistry of surface water and groundwater in some communities of the Lower Tano river basin, which is a coastal region of Ghana, has been characterized. Based on the obtained analytical results, 80% of the surface water (rivers), 100% of the hand dug wells and 96% of the boreholes in the study area are generally fresh and soft. Silicate weathering is the main hydrogeochemical processes contributing to the Na+ ions and HCO3- ions in the groundwater of the basin. Gibbs diagram used to identify the mechanisms controlling the water chemistry of the basin reveals that rock weathering resulting from silicate and carbonate minerals controls majority of the surface water and groundwater chemistry in the basin. Piper trilinear plots and Chadha's diagram, used in this study, indicate that ion exchange processes, reverse ion exchange and rock weathering are the main hydrogeochemical processes controlling the groundwater resources in the basin. Stable isotopic (H-2 and O-18) composition measurements obtained from the study indicate that 30% of the surface water (rivers and lagoon) are less depleted and subjected to evaporation, while the remaining 70% is highly depleted with negligible to no evaporation. Also, the groundwater in the basin is likely recharged by direct infiltration of rainfall from the local rains of the basin together with other sources.
引用
收藏
页数:23
相关论文
共 27 条
[1]  
[Anonymous], RAINF PATT GHAN
[2]  
[Anonymous], P S IS WAT RES MAN
[3]  
[Anonymous], TAN RIV BAS INT WAT
[4]  
[Anonymous], ANN REP MIN WAT RES
[5]  
[Anonymous], THESIS
[6]  
[Anonymous], HDB WATER RESOURCES
[7]  
[Anonymous], 2005, Standard methods for the examination of water and waste- water
[8]  
[Anonymous], RES J ENV EARTH SCI
[9]  
[Anonymous], REP FIELD MAPP GHAN
[10]  
[Anonymous], GROUNDW ASS EL INT W