Estimation of hydraulic parameters in a hard rock aquifer using integrated surface geoelectrical method and pumping test data in southeast Guangdong, China.

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Date: Apr. 2021
From: Geosciences Journal(Vol. 25, Issue 2)
Publisher: Springer
Document Type: Report
Length: 410 words

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Keywords: geophysical method; hydraulic conductivity; transmissivity; groundwater; weathered rock Abstract Estimation of hydraulic parameters is important for the prediction of the future availability of groundwater reserves. Conventionally, pumping tests are conducted on boreholes to measure these parameters. However, such tests are costly and time consuming, and can only provide limited spatial information. An integrated approach of geophysical method and pumping tests is cost-effective and efficient alternative for the estimation of aquifer parameters. A geophysical method of vertical electrical sounding (VES) was carried out in Huizhou ADS site of China for the delineation of aquifer potential zones to assess the groundwater resources contained within the weathered rock. Initially, the pumping test data were used to determine the hydraulic parameters namely hydraulic conductivity (K.sub.w) and transmissivity (T.sub.w) for available production wells. Afterwards, one empirical relation between pumped hydraulic conductivity (K.sub.w) and aquifer resistivity ([rho].sub.a), and another between pumped transmissivity (T.sub.w) and transverse resistance (T.sub.r) were obtained to estimate hydraulic conductivity (K) and transmissivity (T) for all VES stations where pumping tests were not conducted. In this way, the entire study area was investigated to delineate the aquifer potential zones i.e., high potential aquifer zone with [rho].sub.a 150 m.sup.2/day and K 4 m/day, medium potential aquifer zone with [rho].sub.a ranging from 100 to 150 [OMEGA]m, T from 100 to 150 m.sup.2/day and K from 3 to 4 m/day, poor potential aquifer zone with [rho].sub.a from 150 to 300 [OMEGA]m, T from 50 to 100 m.sup.2/day and K from 2 to 3 m/day, and negligible potential aquifer zone with [rho].sub.a 300 [OMEGA]m, T Author Affiliation: (1) Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, No. 19, Beitucheng Western Road, Chaoyang District, 100029, Beijing, China (2) Institutions of Earth Science, Chinese Academy of Sciences, 100029, Beijing, China (3) University of Chinese Academy of Sciences, 100049, Beijing, China (4) Department of Earth Sciences, Quaid-i-Azam University, 45320, Islamabad, Pakistan (a) Article History: Registration Date: 07/18/2020 Received Date: 02/13/2019 Accepted Date: 05/13/2020 Online Date: 07/20/2020 Byline: Muhammad Hasan (corresponding author) (1, 2, 3, a), Yanjun Shang (1, 2, 3), Weijun Jin (1, 2, 3), Gulraiz Akhter (4)

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Gale Document Number: GALE|A654818585