scholarly journals Coastal groundwater aquifer characterization from geoelectrical measurements- A case study at Kalapara, Patuakhali, Bangladesh.

2020 ◽  
Vol 5 (1) ◽  
pp. 1 ◽  
Author(s):  
Mohammad Ibrahim Khalil
Keyword(s):  
Water Quality ◽  
Apparent Resistivity ◽  
Saline Water ◽  
Fine Sand ◽  
Vertical Electrical Sounding ◽  
Groundwater Aquifer ◽  
Electrical Sounding ◽  
Geoelectric Layer ◽  
Upper Aquifer

Vertical electrical sounding has been carried out in a coastal area in the southern part of Bangladesh to locate the groundwater aquifers containing fresh water. The Interpex1X1Dv3 computer program was used to process the field apparent resistivity data sets obtained from the vertical electrical sounding.  Geoelectric layers were identified in the context of resistivity and thickness from the vertical electrical sounding data. From the initial parameters layered model was achieved using the inversion technique. Correlation of the obtained layer model with a nearby lithologic log concludes the groundwater aquifer system of the area. From the electrical properties of the subsurface layers, water bearing layers were detected and characterized. Very fine sand geoelectric layer with a thickness varying from 20 to 143 meters is an upper aquifer and has 0.66–14.02 Ωm apparent resistivity value. Fine sand geoelectric layer with 0.21-5.99 Ωm apparent resistivity value is lower aquifer with maximum thickness ~250 meters. From the resistivity value, it is observed that the upper aquifer contains saline to brackish-fresh water while the resistivity value of the lower aquifer indicates that it contains saline water. The water quality of the upper zone varies geographically from the southern to the northern part in the investigated area. The water quality of the upper aquifer is fresh in the northern part of the study while lower aquifer contains saline water there.

scholarly journals Geophysical Investigation of Groundwater Level Using Vertical Electrical Sounding (A Case Study of Ewu in Edo State Nigeria)

2017 ◽  
Vol 3 (2) ◽  
pp. 22
Author(s):  
Idiegbe Onoriode Gilbert ◽  
Atumah Oyibo Lawrence
Keyword(s):  
Apparent Resistivity ◽  
Research Work ◽  
Fine Sand ◽  
Geophysical Investigation ◽  
Geoelectric Section ◽  
Electrical Sounding ◽  
Electrical Soundings ◽  
Configuration System ◽  
Edo State ◽  
Geoelectric Layer

Abstract- In this research work, four Vertical Electrical Soundings (VES) were carried out in Ewu Town at various locations: Eguare-Ewu, Idunwele-Ewu, Flour Mill Road-Ewu and Eko-Ewu using the ABEM terrameter, by employing the Schlumberger electrode configuration system to determine the level of groundwater.  From the analysis of field data and results of computer iteration, a maximum of four geoelectric layers were obtained.  The first layer of geoelectric section was the lateritic top soil with thickness of 1.21m and 11.1m, for VES 1 and VES 2, with apparent resistivity of 438Ωm and 183Ωm.  The possible aquiferous zone for sustaining groundwater are within the second and third layers for VES 1 and the fourth layer for VES 2, at a depth of 2.67m – 47m and infinity respectively.  The apparent resistivity of the aquiferous layers of VES 1 and VES 2 are 797Ωm and 362Ωm respectively, which is fine sand layer.  The apparent resistivity of the aquiferous layers of VES 3 and VES 4 are 5511Ωm and 129Ωm respectively with infinity thickness.  Key words: Geoelectric layer, aquiferous layers, groundwater

scholarly journals Assessment of the Impact of Sewage Storage Ponds on the Water Environment in Surrounding Area

Proceedings ◽  
2020 ◽  
Vol 51 (1) ◽  
pp. 20
Author(s):  
Kairat Ospanov ◽  
Timur Rakhimov ◽  
Menlibai Myrzakhmetov ◽  
Dariusz Andraka
Keyword(s):  
Water Quality ◽  
Water Environment ◽  
Quality Parameters ◽  
Treated Wastewater ◽  
Groundwater Aquifer ◽  
Sewage Ponds ◽  
Basic Quality ◽  
The Impact

The paper presents the results of research on the environmental impact of sewage ponds serving the city of Kostanay (Kazakhstan). The scope of the research included the determination of basic quality parameters of raw and treated wastewater, an analysis of the chemical composition of groundwater in the vicinity of sewage ponds, and the analysis of the water quality of the Tobol River. The obtained results indicate that sewage from storage ponds, infiltrating into the ground, caused groundwater pollution in the area of about 100 km2 around the reservoirs. Due to the fact that the groundwater aquifer in the vicinity of sewage ponds feeds the Tobol River, it also affects water quality in the river, which does not meet the requirements for most of the analyzed parameters.

scholarly journals Geoelectrical and Microbial Assessment of the Agbarho Abattoir Effluent on Ground Water Quality in Agbarho Community, Delta State

2020 ◽  
pp. 3739-3748
Author(s):  
V.B. Olaseni ◽  
Y.S. Onifade ◽  
S.A. Adeleye ◽  
V.A. Ogah
Keyword(s):  
Ph Value ◽  
Fine Sand ◽  
Total Coliform ◽  
Vertical Electrical Sounding ◽  
World Health ◽  
Electrode Spacing ◽  
Near Surface ◽  
Low Resistivity ◽  
Lateral Distance ◽  
Electrical Sounding

The effluence of Agbarho abattoir wastes and animals’ dung on near surface groundwater quality was geoelectrically investigated using 2-Dimensional Electrical Resistivity by engaging Wenner array configuration using PASI-16GL Terrameter. Four traverses of lateral distance of 50m with 2.5m electrode spacing were gotten from the study area and the acquired data was processed and inverted using RES2DINV software so as to delineate the trend of migration of contaminants. Borehole-water samples were collected within the study area for both physiochemical and microbiological analyzes while the depth of aquifer (groundwater) was determined by employing Vertical Electrical Sounding (VES). The 2-Dimensional Inversion model for traverse 1 and 2 revealed a low resistivity value of 0.445Ωm and 2.53Ωm respectively and this occurred at the top soil. Also, the low resistivity value of 0.319Ωm in traverse 3 was indicated in the second layer at the lateral distance between 15m to 35m and at the depth of 6.22m. The model in traverse 4 revealed low resistivity value of 0.374Ωm from the top layer down to the fourth layer at the depth of 9.8m. These low resistivity values indicate high conductivity of bacterial and algae of the animal waste and this can be attributed to the presence of suspected contaminants plume of the abattoir. The depth of aquifer revealed by Vertical Electrical Sounding was 8.9m which is in third layer and the lithology was found to be as fine sand. All physiochemical results including pH value which is 5.1 (acidic in nature) fell below the permissible limit of World Health Organization (WHO). The microbial result showed the total coliform count value as 70 cfu/ml which is not in-line with WHO standard. In conclusion, the study showed that the contaminant exists and pose threat to groundwater in the study area.

scholarly journals Hydrochemical appraisal of groundwater quality for drinking and irrigation: a case study in parts of southwest coast of Tamil Nadu, India

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Rajkumar Stanly ◽  
Srinivas Yasala ◽  
D. Hudson Oliver ◽  
Nithya. C. Nair ◽  
Karthikeyan Emperumal ◽  
...  
Keyword(s):  
Water Quality ◽  
Seawater Intrusion ◽  
Water Quality Index ◽  
Quality Index ◽  
Tamil Nadu ◽  
Marine Water ◽  
Vertical Electrical Sounding ◽  
Drinking And Irrigation ◽  
Subsurface Layers ◽  
Electrical Sounding

AbstractThe quality of groundwater standards in Muttom–Mandaikkadu coastal stretch is the focus of the present study, whose coastal aquifers are particularly at risk due to intrusion of marine water. Thirty groundwater samples were scrutinized for the assessment of physical and chemical parameters during January and June. Hydrochemical characteristics were spatially depicted to understand the spatial variations such as (pH, EC, TDS, Na+, K+, Ca2+ and Mg2+, SO42−, HCO3−, and Cl−). Drinking water quality index based on those 11 parameters and irrigation water quality index based on EC, Na%, sodium adsorption ratio and permeability index was used to assess the water quality for drinking and irrigation, respectively. These results demonstrate that dominant hydrochemical facies for groundwater in both months are Na-K-Cl-SO4 type and Ca-Mg-Cl-SO4 type. The USSL diagram endorses that most of the water samples belong to low-medium salinity with low sodium hazards. Cl−/HCO3− ratio indicates that the majority of the samples show low to moderate seawater intrusion in the study area. Additionally, six vertical electrical sounding measuring points (Schlumberger array) were carried out in order to determine the number of the underlying layers, aquifer depths and their thicknesses as well as its influence by the marine water. The geophysical self-potential measurements suggest that the groundwater in the Manavalakurichi area is prone to contamination by seawater intrusion, confirmed by the use of Schlumberger vertical electrical sounding. For better understanding, the subsurface layers were shown in a 2D model using the constructed geoelectrical cross section.

scholarly journals Aquifer characterization using vertical electrical sounding in Auchi polytechnic, Auchi, Edo State, Nigeria

2020 ◽  
Vol 39 (3) ◽  
pp. 925-931
Author(s):  
D.A. Babaiwa ◽  
C.O. Aigbogun ◽  
A.T. Umoru
Keyword(s):  
Apparent Resistivity ◽  
Theoretical Models ◽  
Vertical Electrical Sounding ◽  
Aquifer Characterization ◽  
Clayey Sand ◽  
True Resistivity ◽  
Electrical Sounding ◽  
Edo State ◽  
D Model ◽  
Best Fit

The Schlumberger array method was used to carry out a total of eight (8) Vertical Electrical Sounding (VES) with a spread of 350 m in the study area. The Pasi 16-GL Terrameter was used to acquire the data. The data obtained were analyzed with the Winresist 1.0 software to obtain the curves of best fit to the theoretical models. The modeling program converted the apparent resistivity into true resistivity values in 1-D model curves. Five (5) to seven (7) layers were delineated which correspond to the topsoil, sandy clay, clayey sand, sand, dry sandstone and saturated sandstone. The depth to aquifer ranges from 95.0 to 169.6 m with resistivity values ranging from 324.3 to 1524.7 Ωm. Keywords: Apparent resistivity, Aquifer, lithology and vertical electrical sounding.

Sign in / Sign up

Export Citation Format

Share Document