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Title: Using borehole prospecting technologies to determine the correlation between fracture properties and hydraulic conductivity: a case study in Taiwan
Authors: Hung-Chieh Lo
Po-Yi Chou
Shih-Meng Hsu
C.-H. Chao
C.-T. Wang
Contributors: 國立臺灣海洋大學:河海工程學系
Date: 2012-03
Issue Date: 2019-01-03T08:09:25Z
Publisher: Journal of Environmental & Engineering Geophysics
Abstract: Abstract: This study conducted different borehole prospecting techniques for hydrogeological investigations of fractured rock at three active landslide sites in southern Taiwan. Borehole televiewer logging, flowmeter logging, and packer hydraulic tests were performed to quantify various hydrogeological parameters including fracture width, fracture angle, flow velocity and hydraulic conductivity. The dependence of hydraulic conductivity on fracture properties was evaluated by correlation analysis. While a high positive correlation was found between hydraulic conductivity and fracture width (r = 0.89), and flow velocity (r = 0.87), no correlation with fracture angle was observed. In addition, it is worthwhile to note that the product of fracture width and flow velocity showed a strong correlation with hydraulic conductivity (r = 0.97). The regression analysis also revealed that a power law relationship, with a coefficient of determination of 0.83, exists between the hydraulic conductivity and the product of fracture width and flow velocity. The rationality of this relationship was carefully verified by using another group of geophysical borehole measurements. The results demonstrated that it is capable of predicting the hydraulic conductivity of fractured rock based on borehole televiewer and flowmeter logging results.
Relation: 17(1) pp.27-37
Appears in Collections:[Department of Harbor and River Engineering] Periodical Articles

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