標題: Dam overtopping risk assessment considering inspection program
作者: Kuo, Jan-Tai
Hsu, Yung-Chia
Tung, Yeou-Koung
Yeh, Keh-Chia
Wu, Jian-De
土木工程學系
Department of Civil Engineering
關鍵字: dam safety;dam inspection;overtopping risk;gate availability;fault tree
公開日期: 1-Apr-2008
摘要: Safety inspection of large dams in Taiwan is conducted every 5 years. The practice does not take into consideration uncertainty of dam conditions. The goal of this study is to determine the optimal dam inspection interval under the consideration of overtopping risk incorporating uncertainty gate availability. In earlier studies, assessment of overtopping risk only considered the uncertainties in reservoir properties and natural randomness of hydrologic events without giving much thought to the availability of spillway gates. As a result, the overtopping risk could be underestimated. In this study, an innovative concept is proposed to evaluate dam overtopping by taking into account spillway gate availability. The framework consists of three parts: (1) evaluation of conditional overtopping risk for different numbers of malfunctioning spillway gates; (2) evaluation of spillway gate availability; and (3) dam inspection scheduling. Furthermore, considerations are given to overtopping risk, inspection cost, and dam break cost for determining the optimal inspection schedule. The methodology is applied to the Shihmen Reservoir in Taiwan and to evaluate its time-dependent overtopping risk. Results show that overtopping risk considering the availability of the spillway gates is higher than the one without considering the availability of the spillway gates.
URI: http://dx.doi.org/10.1007/s00477-007-0116-3
http://hdl.handle.net/11536/9510
ISSN: 1436-3240
DOI: 10.1007/s00477-007-0116-3
期刊: STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
Volume: 22
Issue: 3
起始頁: 303
結束頁: 313
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