Modeling of hydrogeological parameters and aquifer vulnerability assessment for groundwater resource potentiality prediction at Ita Ogbolu, Southwestern Nigeria

被引:4
|
作者
Falowo, Olumuyiwa Olusola [1 ]
机构
[1] Rufus Giwa Polytech, Dept Civil Engn Technol, Owo, Ondo State, Nigeria
关键词
Ita Ogbolu; Formation factor; Geoelectrical parameters; Geologic units; Hydraulic properties; CRITERIA DECISION-ANALYSIS; SPATIAL PREDICTION; TRANSMISSIVITY; MANAGEMENT; TOOL;
D O I
10.1007/s40808-022-01490-8
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Groundwater prospects and vulnerability mapping to vertical contamination, utilizing multi-criteria evaluation techniques and analytical hierarchy process were carried out within five geologic units in Ita-Ogbolu, southwestern Nigeria, comprising older granite (OGu), migmatite (M), charnockite (Ch), medium to coarse grained biotite granite (OGe), and coarse to porphyritic biotite hornblende granite (OGp). Seventy one electrical soundings involving Schlumberger array with 65 m electrode spread; in-situ (hydraulic) pumping tests; and hydrogeological parameter measurements from fifty one wells were used to acquire the hydrogeological data. The vulnerability evaluation was done using geoelectrical parameters obtained from longitudinal conductance (LC); and the aquifer vulnerability index (AVI), while the groundwater potential index value modeling (GWPIV) was used develop the groundwater potential map. All parameters measured were weighted, rated and assessed according to their significance to groundwater accumulation. The major aquifer unit was the weathered layer, having a 301 ohm m average resistivity, thickness of 14.1 m, 0.67 m/d hydraulic conductivity (K), and 9.82 m(2)/d transmissivity. The average depth of the overburden is 19.6 m, which is a moderate depth for groundwater accumulation. In addition, weak positive coefficients model between K and formation factor were found for all rock units. The relationship or correlation model of hydraulic conductivity (K) and formation factor (Fm) gives OGp (0.6005e(-0.018x)), M (0.4601e(0.0695x)), Ch (0.0838e(-0.0673x)), OGu (1.1623e(-0.091x)), and OGe (0.5937e(0.0578x)). The relationship shows weak positive (< 0.5) for all the rock units. The obtained GWPIV varied from 2.80 to 7.73, with an average of 5.04 suggesting moderate potential; with the potential decreasing in the following order: OGu-OGe-M-OGp-Ch. The calculated AVI model values range from 0.23 to 1.74, with an average of 1.22 indicating extremely vulnerable aquifer to vertical contamination; likewise the vadose zone thickness (6.41 m avg.), and LC (0.1470 mhos avg.) all points to lack of protective capability.
引用
收藏
页码:749 / 769
页数:21
相关论文
共 34 条
  • [1] Modeling of hydrogeological parameters and aquifer vulnerability assessment for groundwater resource potentiality prediction at Ita Ogbolu, Southwestern Nigeria
    Olumuyiwa Olusola Falowo
    [J]. Modeling Earth Systems and Environment, 2023, 9 : 749 - 769
  • [2] Groundwater occurrence and aquifer vulnerability assessment of Magodo Area, Lagos, Southwestern Nigeria
    Oloruntola, Moroof O.
    Bayewu, Olateju O.
    Mosuro, Ganiyu O.
    Folorunso, Adetayo F.
    Ibikunle, Sefiu O.
    [J]. ARABIAN JOURNAL OF GEOSCIENCES, 2017, 10 (05)
  • [3] Groundwater occurrence and aquifer vulnerability assessment of Magodo Area, Lagos, Southwestern Nigeria
    Moroof O. Oloruntola
    Olateju O. Bayewu
    Ganiyu O. Mosuro
    Adetayo F. Folorunso
    Sefiu O. Ibikunle
    [J]. Arabian Journal of Geosciences, 2017, 10
  • [4] Hydrogeological condition and assessment of groundwater resource using visual modflow modeling, Rajshahi city aquifer, Bangladesh
    M. Al Mamunul Haque
    C. S. Jahan
    Q. H. Mazumder
    S. M. S. Nawaz
    G. C. Mirdha
    P. Mamud
    M. I. Adham
    [J]. Journal of the Geological Society of India, 2012, 79 : 77 - 84
  • [5] Hydrogeological condition and assessment of groundwater resource using visual modflow modeling, Rajs']jshahi city aquifer, Bangladesh
    Haque, M. Al Mamunul
    Jahan, C. S.
    Mazumder, Q. H.
    Nawaz, S. M. S.
    Mirdha, G. C.
    Mamud, P.
    Adham, M. I.
    [J]. JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 2012, 79 (01) : 77 - 84
  • [6] A GIS-based aquifer vulnerability assessment in the basement complex terrain of southwestern Nigeria
    Akinwumiju A.S.
    Olorunfemi M.O.
    [J]. Sustainable Water Resources Management, 2018, 4 (4) : 715 - 734
  • [7] Assessment of porous aquifer hydrogeological parameters using automated groundwater level measurements in Greece
    Kirlas, Marios C.
    [J]. JOURNAL OF GROUNDWATER SCIENCE AND ENGINEERING, 2021, 9 (04): : 269 - 278
  • [8] Hydrogeological investigations and groundwater vulnerability assessment and mapping for groundwater resource protection and management: State of the art and a case study
    Chenini, Ismail
    Zghibi, Adel
    Kouzana, Lamia
    [J]. JOURNAL OF AFRICAN EARTH SCIENCES, 2015, 109 : 11 - 26
  • [9] Hydrochemical characterization and vulnerability assessment of unconfined groundwater systems in Ore area, Southwestern Nigeria
    Temitayo Dayo Akinfaderin
    Yinusa Ayodele Asiwaju-Bello
    Miriam Tolulope Ogunsuyi
    [J]. SN Applied Sciences, 2019, 1
  • [10] Hydrochemical characterization and vulnerability assessment of unconfined groundwater systems in Ore area, Southwestern Nigeria
    Akinfaderin, Temitayo Dayo
    Asiwaju-Bello, Yinusa Ayodele
    Ogunsuyi, Miriam Tolulope
    [J]. SN APPLIED SCIENCES, 2019, 1 (06)