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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/42025

Title: Fractured-bedrock aquifer studies based on a descriptive statistics of well-logging data: a case study from the Dajia River basin, Taiwan
Authors: Po-Yi Chou;Shih-Meng Hsu;Po-Jui Chen;Jung-Jun Lin;Hung-Chieh Lo
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: fractured rocks;groundwater hydraulics;geophysical methods;geostatistics;Taiwan
Date: 2014-06
Issue Date: 2017-04-21T07:09:18Z
Publisher: Acta Geophysica
Abstract: Abstract:A simple descriptive-statistical approach is proposed for evaluating the transmissivity of fractured-bedrock under field conditions. Based on standard well logging and identification of structural discontinuities from borehole televiewer, the approach consists of four steps: (1) determination of discontinuity properties, namely the frequency of discontinuities and the ratio of open fractures along the borehole; (2) ranking the three well logs and the discontinuity properties into tertiles (high-to-low); (3) performing statistical analysis (F-test) for the three well logs to assess the significance of open fractures on the water-transmitting potential and then assigned a weighting factor; and (4) a semi-quantitative indicator, RGVFO, is obtained by multiplying all predictive indexes and weighting factors. It is a multi-criteria evaluation procedure that elucidates the quantitative and qualitative importance of all selected geophysical indexes. A high cross-correlation between transmissivity to RGVFO value is found, which indicates that by a combined consideration of well logging and structural discontinuities, an appropriate estimate of bedrock water-transmitting potential can be derived.
Relation: 62(3), pp.564–584
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/42025
Appears in Collections:[Department of Harbor and River Engineering] Periodical Articles

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