干旱区生态环境知识资源中心(Arid): Application of geographical information system to geoelectrical data for evaluation of the vulnerability of aquifers in parts of Bauchi, Northeastern Nigeria

Arid

DOI	10.1007/s12665-020-09308-5
	Application of geographical information system to geoelectrical data for evaluation of the vulnerability of aquifers in parts of Bauchi, Northeastern Nigeria
	Lawal, Abdullateef; Tijani, Moshood N.; D'Alessio, Matteo; Maigari, Abubakar Sadiq
通讯作者	Lawal, A (corresponding author), Abubakar Tafawa Balewa Univ, Dept Appl Geol, Bauchi, Nigeria.
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2021
卷号	80 期号:1
英文摘要	The poor quality and inconsistent nature of most surface water supply in arid and semi-arid regions of the world has increased the reliance on groundwater resources. However, the susceptibility of groundwater to anthropogenic pollution in most cities and rural communities in Nigeria has become a major source of concern. In this study, the protective capacity of the aquifers in parts of the Bauchi State, Northeastern, Nigeria, from surface contamination was investigated in light of the geoelectrical characteristics of the overburden materials for sustainable management of the resources. This study applied a geographical information system (GIS) technique to secondary geoelectrical parameters (Dar-Zarrouk) derived from 94 vertical electrical soundings (VES) to delineate aquifer vulnerability zones. Five different thematic maps (topsoil longitudinal unit conductance, total overburden longitudinal unit conductance, total transverse unit resistance, coefficient of anisotropy, and total overburden isopach) were developed. Suitable weights were assigned to the thematic maps based on their relative influence on the protection of groundwater systems in the area. Subsequently, the ranks of the subclasses of the themes were reclassified based on their respective suitability before the thematic maps were integrated using ArcGIS 10.3 software to generate the overall aquifer protective capacity map of the study area. To validate the map, water samples were collected from 40 wells and trace elements (e.g., Ni, Cu, Sb, Cr, and As) were analyzed. The study area was categorized into three aquifer vulnerability zones: moderate (32.4%), weak/fair (54.5%), and low/poor (13.1%). Moderate zones with limited portions of fair/weak zones were the predominant zones within the basement setting. This reflects the occurrence of clayey saprolitic units within the basement terrain (<100 Omega m) occasioned by weathering of weak ferromagnesian minerals. However, the weak and the poor zones predominate the sedimentary setting with the poor zones concentrated in the southwestern zones of the study underlain by the sedimentary rocks. The poor to weak aquifer protective capacity ratings of the sedimentary settings indicate overburden layers devoid of argillaceous materials and conform to porous and permeable sandy sequences with high transmissivity as revealed by the high transverse unit resistance values (>15,000 Omega m(2)). Over 60% of the basement settings are characterized by moderate aquifer protective capacity. On the other hand, the sedimentary zones due to weak and poor protective capacity zones are more vulnerable to pollution. The trace elemental analysis shows the predominance of As, Cu, and Sb in the sedimentary zones as compared to the basement setting which corroborates the aquifer protective capacity map produced.
英文关键词	Aquifer Geographical information system Vertical electrical soundings Dar-Zarrouk parameters Longitudinal unit conductance Transverse unit resistance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000607868100004
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347851
作者单位	[Lawal, Abdullateef; Maigari, Abubakar Sadiq] Abubakar Tafawa Balewa Univ, Dept Appl Geol, Bauchi, Nigeria; [Tijani, Moshood N.] Univ Ibadan, Ibadan, Nigeria; [D'Alessio, Matteo] Univ Mississippi, Dept Civil Engn, University, MS USA
推荐引用方式 GB/T 7714	Lawal, Abdullateef,Tijani, Moshood N.,D'Alessio, Matteo,et al. Application of geographical information system to geoelectrical data for evaluation of the vulnerability of aquifers in parts of Bauchi, Northeastern Nigeria[J],2021,80(1).
APA	Lawal, Abdullateef,Tijani, Moshood N.,D'Alessio, Matteo,&Maigari, Abubakar Sadiq.(2021).Application of geographical information system to geoelectrical data for evaluation of the vulnerability of aquifers in parts of Bauchi, Northeastern Nigeria.ENVIRONMENTAL EARTH SCIENCES,80(1).
MLA	Lawal, Abdullateef,et al."Application of geographical information system to geoelectrical data for evaluation of the vulnerability of aquifers in parts of Bauchi, Northeastern Nigeria".ENVIRONMENTAL EARTH SCIENCES 80.1(2021).