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Hydrogeological Properties of Uunconsolidated Formations and Bedrocks in the Central Area of Busan Metropolitan City  

Hamm Se-Yeong (Department of Geology, Pusan National University)
Cha Yong-Hoon (Department of Geology, Pusan National University)
Cheong Jae-Yeol (Department of Geology, Pusan National University)
Publication Information
The Journal of Engineering Geology / v.15, no.4, 2005 , pp. 407-421 More about this Journal
Abstract
This study aims to investigate hydrogeological properties of the central area from Yangjeong-Dong to Sujeong-Dong in Busan Metropolitan City. For this study, pumping tests were carried out in the bedrock aquifer of Yangjeong-Dong and the unconsolidated aquifer near Busanjin railway station. The pumping test in the bedrock aquifer containing the Dongrae fault revealed specific hydraulic characteristics with respect to the fault. The pumping test in the unconsolidated aquifer revealed the hydrogeologic properties of both coastal landfill and fine sediments. It was found that the Moench's sphere-shaped dual-porosity model fits the bedrock aquifer, whereas the Neuman's uncofined aquifer model accords with the unconsolidated aquifer. The average transmissivity and storage coefficient of the bedrock aquifer are $2.75{\times}10^{-5}m^2/s\;and\;6.41{\times}10^{-5}$ and those of the unconsolidated aquifer are $8.24{\times}10^{-4}m^2/s\;and\;3.70{\times}10^{-3}$, respectively. On the other hand, slug tests gave average transmissivity and storage coefficient values of $9.84{\times}10^{-4}m^2/s\;and\;1.21{\times}10^{-2}$, respectively.
Keywords
bedrock aquifer; unconsolidated aquifer; sphere-shaped dual-porosity model; unconfined aquifer model; Busan Metropolitan City;
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