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Estimation of the hydraulic parameters by using an alternative vertical electrical sounding technique: case study from semiarid Khanasser valley region, Northern Syria

Asfahani Jamal

Acta Geophysica

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2023

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Vol. 71, no. 2

997--1013

EN

Vertical electrical sounding technique (VES) is proposed as an alternative geoelectrical approach to estimate the hydraulic conductivity and transmissivity parameters related to the Quaternary aquifer of semiarid Khanasser valley, Northern Syria. Schlumberger array is used for carrying out the VES measurements, where three of them were made just near three existing boreholes for comparison. The conjoint analysis of the pumping tests results from the available three drilled boreholes, and the geoelectrical Dar-Zarrouk of transverse resistance (R) and longitudinal conductance (S) parameters resulted from VES interpretations allows to obtain the both parameters of the hydraulic conductivity and transmissivity Quaternary aquifer. Empirically calibrated relationship between hydraulic conductivity evaluated by using the available pumping test results and the transverse resistance (R) of the Quaternary aquifer is derived for those three boreholes. A very good agreement is noticed between the measured hydraulic conductivity from pumping tests and the one computed geophysically. The constructed calibrated relationship is thereafter applied to extrapolate and estimate both the hydraulic conductivity and the transmissivity parameters in thirty-four measured VES points in the Khanasser valley study area. Such an extrapolation allows deriving and characterizing the spatial variation maps of hydraulic conductivity and transmissivity in the study area. The acquired geophysical results give useful information, particularly on the groundwater potentiality of the study region. The developed alternative approach is successfully applied in the study area and can therefore be practiced for characterizing similar semiarid environments worldwide.

2

Alternative vertical electrical sounding technique for hydraulic parameters estimation of the quaternary basaltic aquifer in Deir Al Adas area, Yarmouk Basin, Southern Syria

Asfahani J., Al-Fares W.

Acta Geophysica

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2021

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Vol. 69, no. 5

1901--1918

EN

An alternative geoelectrical approach, based on using the technique of vertical electrical sounding (VES), is developed and proposed to estimate the hydraulic conductivity and transmissivity parameters of the quaternary fractured basalt aquifer (B1Q1) in Deir Al-Adas region, Southern Syria. Nineteen VES points were executed by Schlumberger configuration, where three of them were made near the available boreholes for comparison. Hydraulic conductivity and transmissivity aquifer parameters are obtained by analyzing conjointly the available pumping test results from the existing boreholes and the electrical Dar-Zarrouk (R) parameters from VES data. An empirical equation between the transverse resistance (R), resulting from VES interpretation, and hydraulic conductivity determined from pumping test is established to estimate geophysically hydraulic conductivity of the Quaternary basalt aquifer. A closed agreement is obtained between the computed hydraulic conductivity and the one determined from pumping test. The established calibrated relationship is consequently used to extrapolate and estimate the transmissivity and the hydraulic conductivity parameters in all VES points, where geoelectrical measurements have been carried out. This extrapolation allows characterizing and deriving the spatial maps of hydraulic conductivity, transmissivity and other related hydrogeophysical parameters in the study area. The integrated acquired results give insights, particularly on the groundwater potentiality of the study region, direction of groundwater flux, and plausible lava directions flux. The resulting maps are important in future modeling processes oriented towards better exploiting of the aquifers. The proposed alternative technique is successfully applied in the study area and can be therefore applied for studying similar basaltic environments worldwide.

3

Badania geofizyczne dla oceny stanu środowiska

Żogała B., Zuberek W., Rusin M., Wzientek K.

Zeszyty Naukowe. Górnictwo / Politechnika Śląska

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2001

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z. 248

229-234

PL

W artykule zaprezentowano rezultaty badań geoelektrycznych - sondowania elektromagnetycznych wykonanych na obszarze byłej bazy paliwowej poligonu Borne Sulinowo. Stwierdzono występowanie szeregu dodatnich w stosunku do tła anomalii oporu elektrycznego i ujemnych w stosunku do tła anomalii elektromagnetycznych, które wyraźnie korelują się ze sobą. Ich występowanie wiążemy z zanieczyszczeniami i skażeniami substancjami ropopochodnymi.

EN

The paper presents the results of geoelectrical measurements carried out in the area of the former military range Borne Sulinowo. The interpretation allowed us to distinguish linear geoelectrical anomalies. The anomalies correlate each other. The anomaly zones correspond to oil derivative contamination and still existing underground tube system.

4

Geoelektryczne badania penetracyjne - rozpoznawanie budowy i właściwości ośrodka geologicznego

Mościcki J.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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1998

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T. 24, z. 2

137-149

PL

Przedstawiono metodykę Geoelektrycznych Badań Penetracyjnych (GBP). Specjalistyczna aparatura, sondy i oprzyrządowanie umożliwia wszechstronne badanie właściwości geoelektrycznych ośrodka geologicznego. W otworze penetracyjnym wykonywane są pomiary oporności elektrycznej, rozkładu potencjału elektrycznego oraz badanie efektów elektrodowych - zmian oporu uziemienia elektrody i jej potencjału w funkcji natężenia prądu i jego częstotliwości. Charakterystykę przestrzennej budowy ośrodka umożliwia zastosowanie w otworze sond wieloelektrodowych oraz powierzchniowe profilowanie kołowe z pogrążonym źródłem. Wyniki laboratoryjnych badań efektów elektrodowych w roztworze NaCl stwarzają nadzieję na wykorzystanie opracowanej metody w zagadnieniach badania skażeń środowiska geologicznego. Omówiono wyniki testowych badań wykonanych w Krakowie i Opolnie Zdroju

EN

The method of Penetrometer-Based Geoelectrical investigations (GBP) is presented. The method combines special geoelectrical measurements (made with developed equipment and probes) in penetrometric hole with resistivity pole-dipole, circular profiling using burried source. Some laboratory measurements, numerical models and field tests results are discussed