https://scholars.lib.ntu.edu.tw/handle/123456789/571641
標題: | A method for ex-post benefit-cost assessment for engineering remediation of debris flow impacts | 作者: | Lee H.-C Chen H Lin M.-C Chang C.-H Chuang M.-J Yin H.-Y. HONGEY CHEN |
關鍵字: | Cost benefit analysis; Cost engineering; Landslides; Remediation; Risk assessment; Risk management; Surveys; Benefit/cost; Benefits and costs; Cost assessment; Cost/benefit; Debris flows; Engineering measures; Household level; Monetization; Post assessment; Remediation measures; Debris; cost-benefit analysis; debris flow; engineering geology; landslide; quantitative analysis; remediation | 公開日期: | 2021 | 卷: | 286 | 來源出版物: | Engineering Geology | 摘要: | Ex-ante and ex-post assessments are both essential in risk management, although ex-post assessments of engineering measures have not been widely reported. In this study, an ex-post benefit-cost assessment method was developed to enable the direct impact of remediation engineering measures for debris flows to be quantified. We propose three categories of parameters for calculating benefit and cost: (1) predicted benefits (comprising predicted benefits of saving lives, at the household level, and of infrastructure protection); (2) actual loss (of losing lives, at the household level, and of infrastructure); (3) actual cost of the engineering. Actual benefit was defined as predicted benefit minus loss after completion of the engineering measure. The engineering measures were regarded as effective when benefits outweighed costs. Government data, survey results based on past disasters, and interview results with specialists were used. This methodology was applied and tested in ten villages located in the Gaoping River Basin in southern Taiwan. The result showed that the range of the benefit and cost ratio was between 1.26 and 7.99. We recommend this ex-post assessment method for rapid screening of districts with low benefit-cost ratios. ? 2021 |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102316590&doi=10.1016%2fj.enggeo.2021.106084&partnerID=40&md5=bcdd09340bc877962da8d484df3156b0 https://scholars.lib.ntu.edu.tw/handle/123456789/571641 |
ISSN: | 137952 | DOI: | 10.1016/j.enggeo.2021.106084 |
顯示於: | 地質科學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。