Groundwater Resource Assessment by Hydraulic Properties Determination for Sustainable Planning and Development in Central Part of Ondo State, Nigeria

Abstract

The purpose of this study is to determine hydraulic properties of groundwater in central area of Ondo State using pumping test. The data obtained from area during pumping test sessions which lasted for a period of 7-12 hours for a total of 76 boreholes. The total depth of the drilled boreholes vary from 8.7 m to 50.0 m and an average depth of 27.9 m. The installation depths of the boreholes vary from 8.5 m to 49.7 m, with a mean depth of 26.8 m. The thickness of the aquifer units/screen length is between 2.3-26 m. The results indicate yield capacity (17.28-110.59 m³ /d), hydraulic conductivity (0.1382-48.1210 m/d), transmissivity (2.4705-221.3568 m² /d), storage coefficient or storativity (0.000069 to 0.007496). All the determined hydraulic properties are generally uniform in the area. The generated groundwater potential map shows that most parts (60%) of the area are characterized by fair aquiferous units in terms of their properties. Consequently the result is suggestive of fair water bearing unit and capable of providing a reasonable satisfying and quantifiable amount of water for domestic uses. The findings of this research may serve as baseline information for groundwater exploitation and development in the area.

Contribution of vertical electrical soundings, Landsat 8 and SRTM images to the comparative study of the hydrogeological characteristics of the Foto, Keleng and Foreké areas, West Cameroon

“…The hydraulic conductivity in the study area varies from 0.004 to 44.852 m/d, the porosity Ø from 0.192% to 42.615%, the longitudinal conductance S from 0.001 to 1.101 Ω −1 and the transmissivity values from 0.019 to 504.023 m 2 /day ( Table 1 ). These values are roughly equal to those found by Falowo et al. (2020) in the central part of Ondo State in Nigeria where hydraulic conductivity K varies from 0.1382 to 48.1210 m/day and Tr from 2.4705 to 221.3568 m 2 /day.…”

Groundwater Prediction Analysis for Sustainable Development in Okeigbo, Southwestern Nigeria: A GIS supported AHP Approach

“…Using Table 6, the groundwater protective system in the study area is weak, although the central appears less weak, as shown in spatial distribution map of LUC in Figure 14d. The weak nature of the overburden or the vadose zone to protect the aquiferous zone is usually a function of its thickness and hydraulic conductivity/transmissivity, thus, this study corroborated many previous studies carried out in the Basement Complex of Nigeria, where weak protective capacity against vertical infiltration were recorded (Mogaji et al, 2011;Falowo, 2022a;Akanbi, 2018;Adebo et al, 2022;Falowo et al, 2020;Aina et al, 2019;Akinrinade & Adesina, 2016;Adepelumi et al, 2013;Falowo et al, 2017;Akintorinwa et al, 2020;Adebiyi et al, 2018). Rating of overburden's aquifer protective capacity <0.10 Poor 0.1 -0.49 Weak 0.5 -0.99 Moderate 1.0 -4.99 Good 5.0 -10.0 Very good >10.0 Excellent CONCLUSION Multi-criteria decision analysis (MCDA) using Geographic Information System supported Analytical Hierarchy Process (AHP) has been undertaken in Okeigbo, Southwestern Nigeria.…”

“…The geology of the area where the VESs were conducted are quartzite (constitutes 29% of the VES area), quartz schist (35.5%), and metadiorite (35.5%). The estimated hydraulic conductivity (HC) obtained ranged from 0.23 -0.52 m/d (0.42 m/d) which suggests clay sand (as also recorded in Falowo et al, 2020) and corroborates the electrical resistivity result; while average of 0.23 m/d, 0.52 m/d, and 0.48 m/d were recorded for quartzite, quartz schist, and metadiorite respectively. The transmissivity of an aquifer is explained as the rate at which water flows through the aquifer under a unit width and a unit hydraulic gradient.…”

“…Hydrogeological prospecting entails the creation of hydrogeological maps, the chemical analysis of water wells and boreholes, the observation of the water table, the delineation of groundwater bodies, and the determination of their type based on pumping test (by determining the rate flow, draw down, and radius of influence). Therefore, thorough assessment is crucial for managing and planning the resource, even though It is also true that evaluating groundwater water supplies is difficult (Cosgrove & Loucks, 2015;Falowo & Daramola, 2023;Adagunodo et al, 2018;Bayewu et al, 2018;Tsepav et al, 2015;Falowo et al, 2020). The assessment of groundwater water sources across the nation poses additional challenges, especially in terms of data availability and maintaining consistency and similarity of results (Akanbi, 2017;Tartiyus et al, 2015).…”

Identification of Aquifer Potential by Geoelectric Method in Gedangsari District, Gunungkidul Regency

“…Hydraulic height is not the same as water level [12]. By knowing the hydraulic properties of groundwater using a pump test, it can be shown the potential of groundwater which is characterized by an aquifer unit capable of providing results for household needs [13]. A leaky aquifer can be defined as an aquifer in which groundwater is constrained under a half-impermeable layer so that the aquifer here is located between a free aquifer and a curbed aquifer.…”