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http://dx.doi.org/10.9720/kseg.2021.4.589

A Study on the Application Method of Artificial Injection Test according to the Hydraulic Conductivity of Aquifer  

Chae, Dong-Seok (Jung-In Groundwater Technology Co., Ltd.)
Choi, Jin-O (EPS Engineering Co., Ltd.)
Jeong, Hyeon-Cheol (EPS Engineering Co., Ltd.)
Kim, Chang-Yong (Korea Institute of Civil Engineering and Building Technology)
Publication Information
The Journal of Engineering Geology / v.31, no.4, 2021 , pp. 589-601 More about this Journal
Abstract
Artificial recharge technology is a method for solving problems such as groundwater level drop and ground subsidence caused by groundwater withdrawal. This study investigated the applicability of using the hydraulic conductivity of an aquifer to predict injection test results for aquifer restoration. Pumping and injection tests were performed under the same conditions as those for the artificial injection facility located in Icheon, Gyeonggi-do. The hydraulic conductivity of the aquifer, which plays a decisive role in restoring the groundwater level, was derived from the pumping test. A numerical model of a simplified on-site aquifer was constructed, and a transient analysis was applied with the same conditions as the pumping test. The correlation between the measured and the resulting model values is strong (R2 = 0.78). The injection test was performed in a sedimentary layer composed of silt sand and clay sand. From the results of the injection test, an empirical formula was derived using Theim's formula, which is a common well analysis solution to determine the parameters of the aquifer from time-level data. The model values from the empirical formula have a high degree of correlation (R2 = 0.99) with measured values. Under specific conditions, for areas where it is difficult to conduct an injection test, the formula from this study, which relies on the hydraulic conductivity of the aquifer determined through the pumping test, may be used to predict reliable injection rates for groundwater restoration.
Keywords
artificial injection; pumping test; groundwater modeling; hydraulic conductivity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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