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Ochuko Anomohanran - One of the best experts on this subject based on the ideXlab platform.

  • Assessment of Groundwater Potential and Aquifer Characteristics in the Vicinity of Igun, Eku and Oria in Delta State, Nigeria
    Journal of Water Resource and Protection, 2014
    Co-Authors: Ochuko Anomohanran
    Abstract:

    This study was carried out to investigate the groundwater potential and Aquifer Characteristics of locations in Igun, Eku and Oria in Delta State, Nigeria. Nine vertical electrical soundings using the Schlumberger configuration were conducted to assess the geoelectric properties of the subsurface, while down-hole loggings and pumping test were employed to evaluate the Aquifer Characteristics of the area. The geoelectric data were interpreted by partial curve matching and computer iteration techniques to determine the resistivity, thickness and depth of the subsurface formations. The result revealed the presence of four geoelectric layers comprising of lateritic/loamy topsoil, clay, fine-medium grain sand, and coarse sand. Analysis of the geoelectric interpretation indicates that the third and fourth layers are water bearing horizons. Result further indicates that the fourth layer with a resistivity range of 2212 to 7148 Ωm and depth range of 24.7 to 31.9 m is more prolific than the third layer Aquifer. The result of hydrogeological investigation showed that the electrical conductivity of the groundwater Aquifer in Igun, Eku and Oria are 0.028, 0.032 and 0.024 mS/m respectively, while their corresponding total dissolved solid are 91.08, 95.92 and 79.53 mg/m3. The result also showed that the transmissivity of the groundwater in Igun, Eku and Oria are 0.0728, 0.0873 and 0.0679 m2/min respectively while their corresponding storativity were obtained as 3.21 × 10-4, 4.71 × 10-4, and 2.87 × 10-4. These results obtained from the three locations have shown that the groundwater Aquifer is reliable in terms of quality and yield as they conform to international standards.

  • Evaluation of Aquifer Characteristics in Echi, Delta State, Nigeria Using Well Logging and Pumping Test Method
    American Journal of Applied Sciences, 2013
    Co-Authors: Ochuko Anomohanran
    Abstract:

    This study was carried out to evaluate the Aquifer Characteristics of groundwater at Echi, Delta State , Nigeria. This was carried out by conducting electri cal resistivity and spontaneous potential loggings in a drilled well at the study location. Pumping test us ing a one kilowatt pumping machine was carried out in the well. The logs were interpreted while the record of the pumping test was analysed using the Jacob stra ight line method. The result showed that five lithologic formations which are lateritic sand, clay, fine sa nd, medium grain sand and coarse sand exist in the area and that groundwater exist in the third, fourth an d fifth formations. The analysis of the log record showed t hat the water quality increased with respect to the depth of the well. The value of the conductivity of the a quifer obtained from the analysis of the log record was 5.8 ×10 -3 mS/m while the transmissivity was obtained as 86.0 m 2 /day. The specific capacity of the Aquifer was obtained as 0.258. These values obtained from t he test well revealed that the Aquifer contained go od quality water suitable for drinking and other purpo ses.

Yexin Gao - One of the best experts on this subject based on the ideXlab platform.

  • A Vulnerability Evaluation of the Phreatic Water in the Plain Area of the Junggar Basin, Xinjiang Based on the VDEAL Model
    Sustainability, 2014
    Co-Authors: Ruiliang Jia, Jinlong Zhou, Yinzhu Zhou, Yexin Gao
    Abstract:

    A VDEAL (V is the lithology of the vadose zone, D is the groundwater depth, E is the degree of groundwater exploitation, A is the Aquifer Characteristics and L is the land use pattern.) model, which is suitable for a vulnerability evaluation of the groundwater in arid inland areas, and that is based on the GOD (G is the groundwater status, O is overburden feature and D is groundwater depth) method and DRASTIC (D is the depth of water-table, R is the net recharge, A is the Aquifer media, S is the soil media, T is the topography, I is the impact of the vadose and C is the conductivity of the Aquifer.) model is proposed in this paper. Five indicators were selected by reference to the DRAV (D is the depth of water-table, R is the net recharge, A is the Aquifer media and V is the impact of the vadose.) and VLDA (V is the lithology of the vadose zone , L is the land use pattern, D is the groundwater depth and A is the Aquifer Characteristics and.) models, namely, the lithology of the vadose zone (V), the groundwater depth (D), the degree of groundwater exploitation (E), the Aquifer Characteristics (A) and the land use pattern (L). According to monitoring data from 2003 and 2011, the variations of phreatic water quality in the plain area of the Junggar Basin were divided into three types: the water quality may have deteriorated, be unchanged or improved. Four groups of indicator weights were configured to calculate the vulnerability index using the VDEAL model. The changes of phreatic water quality were then compared against the vulnerability index. The normalized weights of V, D, E, A, and L were respectively 0.15, 0.25, 0.10, 0.10, and 0.40; this is according to the principle that the sampling sites of deteriorated water quality are generally distributed in a high-vulnerability region, and the sites of unchanged and improved water quality are distributed in middle vulnerability, low vulnerability and invulnerable regions. The evaluation results of phreatic water vulnerability in the plain area of the Junggar Basin based on the VDEAL model are as follows. The regions with vulnerability indexes of 2.0–4.0, 4.0–6.0, 6.0–8.0, and >8.0, respectively account for 2.2%, 61.0%, 35.9%, and 0.9% of the region. The regions with a higher vulnerability are mainly distributed in the farmlands and the sand and gravel regions with a phreatic water depth of 6 m. The phreatic water in these regions is deficient with regard to the infiltration of irrigation water and the recharge from precipitation.

G. Stavroulakis - One of the best experts on this subject based on the ideXlab platform.

  • Estimation of Aquifer hydraulic parameters from surficial geophysical methods: A case study of Keritis Basin in Chania (Crete - Greece)
    Journal of Hydrology, 2007
    Co-Authors: Pantelis Soupios, Maria Kouli, Filippos Vallianatos, Antonis Vafidis, G. Stavroulakis
    Abstract:

    Summary Knowledge of Aquifer parameters is essential for the management of groundwater resources. Conventionally, these parameters are estimated through pumping tests carried out on water wells. Few boreholes may be available and carrying out pumping tests at a number of sites may be costly and time consuming. The application of geophysical methods in combination with pumping tests provides a cost-effective and efficient alternative to estimate Aquifer parameters. A geophysical method is used to obtain Aquifer Characteristics that are estimated through the pumping tests. A correlation is established between these parameters at other sites where pumping has not been carried out. In this way, the entire investigation area could be covered to characterize an Aquifer system. This study has been carried out in the Keritis basin in Chania, Crete – Greece, where the Aquifer Characteristics are required for the management of groundwater in the region.

Alvan Ikoku - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of the Aquifer Characteristics of Nteje and Environs, Anambra Basin, South Eastern, Nigeria
    2015
    Co-Authors: Alvan Ikoku
    Abstract:

    Hydro-geophysical investigation of Nteje in Anambra East Local Government and environs were carried out with a view to ascertaining Aquifer Characteristics in thirteen (13) communities. Field data revealed four to five geo-electric units consisting of saturated Aquiferous zonesmade up of one unconfined and three or four confined Aquifers.The predicted watertable ranges from 21.5m to 102m with linear increase from NW to SE of the study area.The Isopach map shows that the Aquifer is thicker at the NE and NW parts where there are more clusters of the peak contours when compared to the other parts of the study. The Aquifer thickness map shows that there are concentrations of sediments. The transmissivity T C calculated from VES result ranges from 0.4750 m 2 /day to 61.4161 m 2 /dayand the conductivity varies from 0.0080 m/day to 1.4907 m/day.This implies that the Aquifer at

O.c Akakuru - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of the Aquifer Characteristics of Nteje and Environs, Anambra Basin, South Eastern, Nigeria
    Journal of Natural Sciences Research, 2015
    Co-Authors: A.o. Usman, J. I. Omada, A. O Omali, O.c Akakuru
    Abstract:

    Hydro-geophysical investigation of Nteje in Anambra East Local Government and environs were carried out with a view to ascertaining Aquifer Characteristics in thirteen (13) communities. Field data revealed four to five geo-electric units consisting of saturated Aquiferous zonesmade up of one unconfined and three or four confined Aquifers.The predicted watertable ranges from 21.5m to 102m with linear increase from NW to SE of the study area.The Isopach map shows that the Aquifer is thicker at the NE and NW parts where there are more clusters of the peak contours when compared to the other parts of the study. The Aquifer thickness map shows that there are concentrations of sediments. The transmissivity T C calculated from VES result ranges from 0.4750 m 2 /day to 61.4161 m 2 /dayand the conductivity varies from 0.0080 m/day to 1.4907 m/day.This implies that the Aquifer at Umeri will be adequate for regional water scheme. KEY WORDS: Geo-electric layers, Aquifer, Correlation, Transmissivity