Aquifer Pumping Research Articles

Groundwater vulnerability assessment using water quality index (WQI) under geographic information system (GIS) framework in parts of Uttar Pradesh, India

Groundwater resources are affected in principle by three major activities. First is excessive use of fertilizers and pesticides in agricultural areas. The second is untreated/partially treated wastewater to the soil/water and the third one is excessive pumping and improper management of aquifers. Due to large-scale urban growth which has triggered domestic effluents and on the other hand industrial development activities has resulted in the generation of a copious volume of industrial effluents directly and indirectly contaminate the groundwater. In a drinking water quality assessment, the decision-making based on water quality data is a crucial issue because several parameters compromise its quality. There has been considerable advancement in the field of water quality assessment particularly based on the principle of the water quality index (WQI) using modified concepts. The study area which includes part of Varanasi and Sant Ravidas Nagar districts are centers for urban growth along with industrial setup in Uttar Pradesh, India. Water quality index (WQI) is an index reflecting the composite influence of different water quality parameters which is considered for calculation. 50 numbers of groundwater samples were collected from various locations in the study area as per the standard protocol prescribed by the American Public Health Association (APHA). Twenty-two water quality parameters have been considered for the calculation of water quality index viz. pH, electrical conductivity (EC), total hardness (TH), total dissolved solids (TDS), alkalinity, sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg2+), nitrates (NO3−), bicarbonate (HCO3−), chlorides (Cl−), sulphates (SO4−), fluorides (F−), chromium (Cr), zinc (Zn), copper (Cu), manganese (Mn), iron (Fe), nickel (Ni), lead (Pb) and cadmium (Cd). The Bureau of Indian Standard has been considered to assess the suitability of groundwater for drinking purposes and the calculation of the water quality index (WQI). Correlation study among various physicochemical properties also reflects certain significant negative relationships. The current study shows that 50% of the collected water samples are non-suitable for the drinking water category and the rest is falling under the good, moderate, poor, very poor as per the Water Quality Index (WQI) classification. The present study is quite helpful for the proper planning and management of available water resources for drinking purposes.

Groundwater Recharge for Drought and Endangered Species Protection

San Antonio Water Systems (SAWS) developed its H2Oaks aquifer storage and recovery project in response to pumping restrictions set on its primary source of water supply, the Edwards Aquifer. The H2Oaks project pumps water from the Edwards Aquifer during wet years and transports it to the H2Oaks project site, where it is injected into the Carrizo-Wilcox aquifer for storage. Stored water is withdrawn to meet municipal demand when restrictions on Edwards Aquifer pumping are in place. Although created for the purpose of securing supplies for SAWS, the H2Oaks project became a centerpiece for regional water management. Storage is used during drought to mitigate impacts on pumping while ensuring minimum springflows needed to protect endangered species in the Edwards aquifer. Currently, the project stores over 176,000 acre-feet of water. This case study traces the development of the H2Oaks project from the passage of the Edwards Aquifer Act to the project’s current implementation. The H2Oaks project demonstrates the potential for groundwater recharge projects to store water as protection against drought conditions. It also demonstrates how storage by one entity can support water management needs across the broader community of water users.

A multidisciplinary approach in cover-collapse sinkhole analyses in the mantle karst from Guangzhou City (SE China)

Mantled karst is characterized by solution processes in underground conditions, where karst evidence can be masked. In mantled karst environments, cover-collapse sinkhole can be considered one of the most hazardous elements. This study seeks to develop a methodological framework utilizing different techniques and approaches to understand cover-collapse sinkhole genesis and its likely evolution. The study area is located in the Conghua district of Guangzhou city, Guangdong Province, in the south-eastern region of China. A mapping procedure was introduced to combine data from aerial photographs and intensive field investigations. In addition, data interpretations from borehole drilling activities and different geophysical approaches were performed to reconstruct the Quaternary deposit features, rock head morphology, and karst features. During these investigations, the detailed typology, morphometry, and chronology inventory of 49 cover-collapse sinkholes were analysed, and three karst fissure zones covered by Quaternary soil were observed. In the study, the hydrogeological data suggested that karst aquifer pumping triggered the drop in groundwater levels. Cover-collapse sinkholes might be ascribed to erosion of the soil layers due to the groundwater level decline.

How daily groundwater table drawdown affects the diel rhythm of hyporheic exchange

Abstract. Groundwater table dynamics extensively modify the volume of the hyporheic zone and the rate of hyporheic exchange processes. Understanding the effects of daily groundwater table fluctuations on the tightly coupled flow and heat transport within hyporheic zones is crucial for water resources management. With this aim in mind, a physically based model is used to explore hyporheic responses to varying groundwater table fluctuation scenarios. The effects of different timing and amplitude of groundwater table daily drawdowns under gaining and losing conditions are explored in hyporheic zones influenced by natural flood events and diel river temperature fluctuations. We find that both diel river temperature fluctuations and daily groundwater table drawdowns play important roles in determining the spatiotemporal variability of hyporheic exchange rates, temperature of exfiltrating hyporheic fluxes, mean residence times, and hyporheic denitrification potentials. Groundwater table dynamics present substantially distinct impacts on hyporheic exchange under gaining or losing conditions. The timing of groundwater table drawdown has a direct influence on hyporheic exchange rates and hyporheic buffering capacity on thermal disturbances. Consequently, the selection of aquifer pumping regimes has significant impacts on the dispersal of pollutants in the aquifer and thermal heterogeneity in the sediment.

Artificial aquifer recharge and pumping: transient analytical solutions for hydraulic head and impact on streamflow rate based on the spatial superposition method

The behaviour of transient groundwater mounds in response to infiltration from surface basins has been studied for decades, but some common settings still lack analytical solutions. It has been shown that applying mathematical integration to the line-sink solution developed by Hantush in the 1960s for pumping an unconfined aquifer, considering recharge over the surface of a defined area, is identical to his solution for groundwater mounding below a rectangular basin. This implies that the superposition principle can, generally, be used to directly include pumping wells, as well as aquifer boundaries, to derive a unique solution. Moreover, other line-sink solutions can be used with a spatial superposition method for addressing a variety of hydrogeological settings, provided the behaviour of the relevant partial differential equations is linear. Based on this principle and on existing line-sink solutions, several analytical solutions are proposed that are able to consider a rectangular recharging area and a pumping well in an unconfined aquifer: (1) near a stream, (2) between a stream and a no-flow boundary, with and without the influence of natural recharge, (3) near a stream that partially penetrates an aquifer and (4) for a multi-layer aquifer. For cases including streams, transient solutions of the impact on streamflow rate are also presented. The proposed analytical solutions will be of practical use for managed aquifer recharge, in particular the design of structures for artificially recharging an aquifer, possibly pumped by one or several wells.

The Weight of Cities: Urbanization Effects on Earth's Subsurface

AbstractAcross the world, people increasingly choose to live in cities. By 2050, 70% of Earth's population will live in large urban areas. Upon considering a large city, questions arise such as, how much does that weigh? What are its effects on the landscape? Does it cause measurable subsidence? Here I calculate the weight of San Francisco Bay region urbanization, where 7.75 million people live at, or near the coast. It is difficult to account for everything that is in a city. I assume that most of the weight is buildings and their contents, which allows the use of base outline and height data to approximate their mass, which is cumulatively 1.6·1012 kg. I build a series of finite element models to study effects of pressure exerted by the weight distribution. Within the elastic realm, I look at compression, flexure, isostatic compensation, stress change, dilatation, and fluid flow changes. Within the nonlinear realm I show example calculations of primary and secondary settlement of soils under load. The combined modeled subsidence from building loads is at least 5–80 mm, with the largest contributions coming from nonlinear settlement and creep in soils. A general result is closing of pore space and redirection of pore fluids. While the calculated subsidence of the Bay Area is relatively small compared with other sources of elevation change such as pumping and recharge of aquifers, all sources of subsidence are concerning given an expected 200–300 mm sea level rise at San Francisco by the year 2050.

Evaluation of land subsidence potential by linking subsurface deformation to microstructure characteristics in Suzhou, China

Land subsidence is often associated with compaction of subsurface strata, which cannot be recorded in detail by precise leveling, satellite imagery, and even extensometers. The distributed fiber optic sensing (DFOS) technique is advantageous in subsurface deformation monitoring, because it can image distributed profiles of vertical deformation by distributed strain sensing. Here, we propose to use the relationship between the soil porosity change and soil strain to verify the DFOS monitoring results. An observation case in Shengze, Suzhou (southern Yangtze Delta, China) 2012–2019 shows that compression strain occurs mainly in two aquitards adjacent to the pumping aquifer. The compression-rebound deformation of soil layers is closely related to the change in groundwater level. The microstructure, especially pore structure, affects the compressibility of soils. Changes in pore size derived by groundwater level fluctuations are macroscopically expressed as soil strain. The calculated strain induced by water level drop was basically consistent with the monitoring value, proving the credibility of DFOS technique. Moreover, DFOS can be used for the estimation of strata compression potential, which is of great significance to the management of land subsidence and groundwater exploitation.

Representing Intercell Lateral Groundwater Flow and Aquifer Pumping in the Community Land Model

AbstractRepresentation of subsurface hydrology in global land surface models has been advanced but outstanding challenges and opportunities remain, especially in better simulating lateral groundwater flow and aquifer pumping for irrigation. This study improves the representation of groundwater in the latest version of the Community Land Model (version 5) by implementing a prognostic groundwater module that accounts for lateral groundwater flow, aquifer pumping, and conjunctive use of groundwater and surface water for irrigation. In particular, we introduce—for the first time—explicit representation of steady‐state well equation in large‐scale hydrological modeling. Simulations are conducted at ∼5 km resolution over the conterminous US. Groundwater level, terrestrial water storage (TWS), and river discharge are evaluated over the major US aquifers and river basins using in situ observations of groundwater and river discharge and the TWS inferred from the Gravity Recovery and Climate Experiment (GRACE) satellites. The implementation of groundwater pumping results in significant improvements in simulation of spatiotemporal water‐level change over the US High Plains and Central Valley Aquifer (CVA) and that of TWS over the CVA. Improvements in river discharge over the major US river basins are also achieved but are not substantial. Furthermore, the representation of pumping leads to certain overestimation in TWS trend compared to GRACE data in regions with high groundwater withdrawals. The consideration of lateral groundwater flow provides improvements in the subsurface response to pumping and natural wet and dry cycles, particularly at the grid cell level. These results provide a basis for improved groundwater modeling over large scales.

Toward Retrieving Distributed Aquifer Hydraulic Parameters From Distributed Strain Sensing

AbstractSubtle elastic rock deformation during aquifer testing may bear hydraulic parameter (permeability and compressibility) information owing to the poroelastic hydromechanical coupling effect. Here we report that such in situ rock deformations (∼50 µε) during an aquifer pumping test are successfully measured along a vertical well by a high‐resolution fiber optic distributed strain sensing (DSS) tool with an accuracy of 0.5 µε. We investigate the feasibility of hydraulic parameter estimation at meter scale using DSS data through a coupled hydromechanical model. Both synthetic and field cases are tested with sensitivity analysis. The results indicate that the simultaneous estimation of permeability and compressibility using DSS data is possible at low noise levels. However, only non‐global near‐optimal solutions can be obtained using the applied gradient‐based inversion algorithm, because of parameter crosstalk and sensitivity problems when the data contain large noise. In particular, estimation is difficult for zones with relatively low permeability due to the low sensitivity to the strain changes. The estimated permeability/compressibility structures for the field test are largely consistent with other geological information from well logs. Our study suggests that DSS data can be quite useful in aquifer characterization and fluid flow profiling in addition to geomechanical monitoring. The obtained hydraulic information is beneficial for the optimized reservoir management of water and oil/gas storage.

Assessment of Hydraulic Parameters and Protection Zones of Catchment Aquifers for Water Supply Network in Ndé Division, West-Cameroon (Central Africa)

Ndé Division in West-Cameroon is facing with water supply although many attempts of restoring existing SCANWATER facilities by Bangangté Municipality. In order to address the issue, we assess the exploitable pumping flow rate of catchment aquifers and its hydraulic properties by using Jacob and Theis method, and define protection zones with Hoffman and Lillich method. It emerges that the hydraulic conductivity of aquifer is in the order of 10-4 m/sec, transmissivity varies from 10-4 to 10-6 m2/sec. Aquifer pumping flow rate (Q) varies between 1.5 and 10.5 m3/h. In volcanic rocks, aquifer is more productive (4.5 ≤ Q ≤ 10.5 m3/h). Transfer time of pollutants to aquifer varies from 3 to 56 days depending on rock-types and groundwater slope (0.03 - 0.13 m/m). Furthermore, 113,624 m and 1123 m are radius to be implemented for a better protection of groundwater against any form of pollutant.

The Effects of Fault-Zone Cementation on Groundwater Flow at the Field Scale.

Fault zones are an important control on fluid flow, affecting groundwater supply, contaminant migration, and carbon storage. However, most models of fault seal do not consider fault zone cementation, despite the recognition that it is common and can dramatically reduce permeability. In order to study the field-scale hydrogeologic effects of fault zone cementation, we conducted a series of aquifer pumping tests in wells installed within tens of meters of the variably cemented Loma Blanca Fault, a normal fault in the Rio Grande Rift. In the southern half of the study area, the fault zone is cemented by calcite; the cemented zone is 2-8 m wide. In the center of the study area, the cemented fault zone is truncated at a buttress unconformity that laterally separates hydrostratigraphic units with a ∼40X difference in permeability. The fault zone north of the unconformity is not cemented. Constant rate pumping tests indicate that where the fault is cemented, it is a barrier to groundwater flow. This is an important demonstration that a fault with no clay in its core and similar sediment on both sides can be a barrier to groundwater flow by virtue of its cementation; most conceptual models for the hydrogeology of faults would predict that it would not be a barrier to groundwater flow. Additionally, the lateral permeability heterogeneity across the unconformity imposes another important control on the local flow field. This permeability discontinuity acts as either a no-flow boundary or a constant head boundary, depending on the location of pumping.

Groundwater Pumping Management in Controlling Seawater Up-Coning in The North Coastal Area of Makassar

In big cities, communities generally consume clean water from local water supply company which uses surface water sources. However, due to the limitations of the company in supplying water, particularly in the dry season, an alternative is required, such as using groundwater without causing over-exploitation. This study aims to determine the optimal rate of groundwater pumping in the coastal aquifer to avoid seawater up coning using SEAWAT V.4 numerical model. The research method was carried out using a GEO-7X GPS device to obtain coordinate's location, land elevation and observation well distance from the coastline. Secondary data in the form of aquifer thickness data and geological map of the site were obtained from previous studies. The salinity test results show that the average salinity value of the ten water samples from observation wells is 36.8 mg/l, which means that the water is categorized as non-saline water (freshwater). These data are in line with the groundwater utilization monitoring activity report of Makassar City Environment Office in 2018, which reported that Ujung Tanah and Wajo Districts were found to be free from seawater intrusion. Even so, the potential for seawater intrusion is still considered high because of the location of community groundwater wells are near from the coast. One of the efforts to prevent seawater up coning is by limiting groundwater pumping. From the numerical modeling results, it is found that the maximum groundwater discharge in the research site, namely P3 is 20% of total flow rate(0.3 m3/day), P5 is 20% (1.32 m3/day), P6 is 40% (0.52 m3/day) and P10 is 20%(0.63 m3/day).

Relationship Between Aquifer Pumping Response and Quality of Water Extracted from Wells in an Active Hydrothermal System: The Case of the Island of Ischia (Southern Italy)

The thermal waters of the Island of Ischia, an active volcano located in Southern Italy, are widely used for supplying numerous spas. Groundwater withdrawals occur mainly through wells in the coastal strip. This study explores the impact of withdrawals on the quality of the waters used in thermal facilities, which is required to be constant in terms of composition and temperature by law. For this purpose, specific investigations were conducted including 155 pumping tests, 124 water temperature measurements during pumping tests, 31 temperature and electrical conductivity logs and periodic chemical analysis of the waters of 21 selected wells. By comparing the response to pumping of the aquifer and the quality of the water extracted from the wells, it turned out that the quality of groundwater supplying spas depends not only on natural phenomena (meteoric recharge, seawater intrusion, and rising of deep hydrothermal fluids) but also relies on the island sector where groundwater is pumped and on the pumping method. The distance of the wells from the coast, the type of aquifer formation intersected by the wells, and the field of groundwater temperature of the hydrothermal system strongly affect the aquifer pumping response, determining the quality of water extracted from wells and its variation over time. In Ischia, techniques and regimes of groundwater withdrawals should adapt to the local aquifer pumping response, more than in another hydrogeological context. The concomitant analysis of drawdown, water temperature, and salinity during pumping turned out to be a valuable tool to define the sustainable yield of the single well.

On the practical application of the Cooper and Jacob distance-drawdown method to analyse aquifer-pumping test data

Studies have illustrated how Infinite Acting Radial Flow (IARF) can be used as an objective criterion than the u condition to evaluate the valid of applying the Cooper and Jacob time-drawdown (1946) method. The Cooper and Jacob (1946) time-drawdown and distance-drawdown methods work on the same principle which incorporates the u condition. A similar study to assess the use of IARF as a criterion to determine the applicability of the Cooper and Jacob distance-drawdown (1946) method to analyse aquifer-pumping tests would be beneficial to groundwater practitioners. This study uses numerical groundwater flow modelling to assess and evaluate the application of the Cooper and Jacob (1946) distance-drawdown method to analyse multi-well aquifer pumping tests in ideal homogenous porous and isotropic confined aquifers under unsteady-state flow. Three multi-well aquifer-pumping tests are simulated in ideal one-layer homogeneous and isotropic confined aquifer models using Processing MODFLOW and the data is analysed by the Cooper and Jacob (1946) distance-drawdown method. The results shows that the Cooper and Jacob (1946) distance-drawdown method can only estimate correct transmissivity and storativity parameters when it is applied to observation data after IRAF. The u values calculated for the analysis vary over a wider range and do not satisfy all the literature prescribed u values. The study demonstrates and recommends how IRAF should be used as an objective criterion to determine the validity of applying the Cooper and Jacob (1946) distance-drawdown method.

Statistical and hydro-mechanical coupling analyses on groundwater drawdown and soil deformation caused by dewatering in a multi-aquifer-aquitard system

Groundwater withdrawn in a multi-aquifer-aquitard system (MAAS) may cause vertical cross-flow supplement and result in groundwater drawdown and soil deformation in both aquifers and aquitards. This study investigates the responses of groundwater and deep soils to dewatering in the MAAS through statistical and numerical analyses. Field data of ten pumping tests conducted in the MAAS, in Shanghai urban area are collected, and a statistical analysis for groundwater drawdown and ground settlement is performed. Field measurements indicate that the drawdowns are distributed linearly along radial distance in logarithmic coordinates. However, the ground settlements are disproportional to the drawdowns and show a trilinear distribution along the radial direction. To examine the inconsistent distributions of the groundwater drawdown and the ground settlement, representative dewatering models are developed numerically and solved explicitly by the coupled Biot’s three-dimensional consolidation theory. Numerical results of dewatering in MAAS are compared to those obtained by a non-coupling formula. Moreover, effect of a micro-confined aquifer on drawdown and soil deformation is discussed. It is found that soil compression in each stratum is closely related to the decline of the pore pressure, whilst small expansions are observed in early dewatering stages. Due to the hydro-mechanical coupling effect, the ground surface settlement near the pumping well obtained by the coupled numerical method is significantly smaller than that by the non-coupling formula. Owing to horizontal and vertical cross-flow supplement, an additional aquifer embedded in aquitard above the pumping aquifer can relief both the groundwater drawdown and ground surface settlement significantly.

Groundwater level observations in 250,000 coastal US wells reveal scope of potential seawater intrusion

Seawater intrusion into coastal aquifers can increase groundwater salinity beyond potable levels, endangering access to freshwater for millions of people. Seawater intrusion is particularly likely where water tables lie below sea level, but can also arise from groundwater pumping in some coastal aquifers with water tables above sea level. Nevertheless, no nation-wide, observation-based assessment of the scope of potential seawater intrusion exists. Here we compile and analyze ~250,000 coastal groundwater-level observations made since the year 2000 in the contiguous United States. We show that the majority of observed groundwater levels lie below sea level along more than 15% of the contiguous coastline. We conclude that landward hydraulic gradients characterize a substantial fraction of the East Coast (>18%) and Gulf Coast (>17%), and also parts of the West Coast where groundwater pumping is high. Sea level rise, coastal land subsidence, and increasing water demands will exacerbate the threat of seawater intrusion.

Preferential Flow Enhances Pumping‐Induced Saltwater Intrusion in Volcanic Aquifers

AbstractPreferential flow can result in rapid contamination of groundwater resources. This is particularly true in aquifers with connected, high permeability geologic structures and in coastal systems where the oceanic source of contamination is ubiquitous. We consider saltwater intrusion due to pumping in volcanic aquifers with lava tubes represented as connected high‐K structures and compare salinization responses to those of heterogeneous aquifers with different structure and equivalent homogeneous systems. Three‐dimensional simulations of variable‐density groundwater flow and salt transport show that conduits formed by lava flows create preferential groundwater flow in volcanic aquifers. These conduits allow fresh groundwater to extend further offshore than in other systems. However, onshore pumping causes saltwater to migrate landward quickly through the conduits relative to the other models, resulting in more severe saltwater intrusion, particularly at shallow depths. The geometry of geologic heterogeneity in volcanic aquifers leads to increased risk of salinization of fresh groundwater as well as substantial uncertainty due to significant spatial variation in saltwater intrusion. The findings illustrate the importance of considering geologic heterogeneity in assessing the vulnerability of coastal freshwater resources in volcanic and other aquifers with connected high‐permeability geologic structures.

Creep consolidation in land subsidence modelling; integrating geotechnical and hydrological approaches in a new MODFLOW package (SUB-CR)

Abstract. Creep and secondary consolidation are important phenomena in settlement caused by surface loads, but not commonly considered in land subsidence driven by groundwater extraction. To explore the role of creep in such settings, a new MODFLOW-2005 land subsidence package was developed that incorporates a creep formulation gleaned from geotechnical software. This formulation, which is based on the isotache concept, is an extension of, and incorporates the classical elastoplastic compression model of Terzaghi as a limiting case. The package is introduced, and results are presented of an application to a site in northern Jakarta. It is shown that the isotache model requires considerably higher overconsolidation levels of clays than the Terzaghi model, and that creep contributes to subsidence long after drawdown in pumped aquifers has stabilized, a phenomenon that is traditionally attributed to “hydrodynamic lag”.

Intensive long-term pumping in the Principal-Lagunera Region aquifer (Mexico) causing heavy impact on groundwater quality

Located in the semi-arid and water-scarce area, Comarca Lagunera is one of the main agricultural and dairy products supplying regions in Mexico. As a consequence of the intensive exploitation of groundwater resources for irrigating purposes over one century, the water table has declined up to 200 meters and developed several cones of depression, aggravating the energy consumption necessary for lifting and distributing the groundwater in the agricultural land. Due to this long-term overdraft pumping, not only the groundwater flow dynamics are constantly changing, but also water quality has deteriorated significantly during the last decades. This study evaluates groundwater dynamics and the evolution of ion element composition and the quality of water from the Principal-Lagunera Region aquifer. Elevated nitrate and sulfate concentrations are ubiquitous near Bermejillo in the northwestern portion. Arsenic concentration exceeds international drinking water recommendations in 80% of the sampled sites and reaches maximum values of up to 349 μg/l in agricultural fields. The distribution of these high values of arsenic overlaps with the location of depression cones. This suggests a geogenic origin of this metalloid.

Determination of aquifer parameters from geosounding data in parts of Afikpo Sub-basin, southeastern Nigeria

Aquifer parameters (e.g. hydraulic conductivity and transmissivity) are routinely determined from pumping tests. Pumping tests are very expensive and researchers have continued to explore cheaper and reliable alternatives to determine these parameters at locations without producing wells. Electrical resistivity method was applied to determine hydraulic conductivity and transmissivity in areas without boreholes in the present study area. Fifteen (15) vertical electrical soundings with a maximum current electrode spacing of 300 m, in the Schlumberger configuration, were acquired. Seven (7) of the soundings were carried out near existing boreholes for comparative analysis between geologic and geoelectric sections. Modelling was done using the IPI2™ software. Cross-plot of hydraulic conductivity (K) obtained from pumping tests and aquifer resistivity (ρ) extracted from sounding interpretations was used to generate a linear relation of the form K = 0.0426ρ + 0.8584. A similar cross-plot between transmissivity (T) and transverse resistance (R) gave another linear relation of the form T = 31.92–0.0019R. These relations, which connects geoelectrical properties with aquifer hydraulic properties, were used to estimate aquifer properties in areas away from well locations. Results show that depth to water ranges from 11.5 m at Mgbom to 52.1 m at Immama Ozizza, while aquifer thickness varies from 14 m at Poperi Primary School, Amasiri (VES 1) to 47.6 m at Immama Ozizza (VES 11). Hydraulic conductivity values range from 1.344 m/day at Mgbom (VES 2) and 2.792 m/day at Okpotokun Primary School Amata-Akpoha (VES 15), with a mean of 2.068 m/day. Transmissivity on the other hand varies between 28.18m2/day at Immama Ozizza (VES 11) and 31.73 m2/day at Mgbom (VES 2) with a mean of 29.96 m2/day. The derived results correlates well with those obtained from pumping test analysis and have provided a cost-effective method for estimating aquifer hydraulic parameters in areas away from well locations.