Advanced Methods of Evaluating Benefits from Improved Flood Immunity in Queensland

作     者：Wayne Davies 

作者机构：Department of Transport and Main Roads Queensland 4000 Australia 

出 版 物：《Journal of Civil Engineering and Architecture》 (土木工程与建筑（英文版）)

年 卷 期：2013年第7卷第8期

页      面：973-991页

学科分类：12[管理学] 1204[管理学-公共管理] 07[理学] 070601[理学-气象学] 08[工学] 081303[工学-城市规划与设计(含：风景园林规划与设计）] 0706[理学-大气科学] 0813[工学-建筑学] 0833[工学-城乡规划学] 083302[工学-城乡规划与设计] 

主　　题：Flood immunity economic evaluation cost benefit analysis road closures. 

摘      要：The regular occurrence and the high costs of flooding to both road agencies and communities is a strong impetus to investigate the methodologies applied to evaluating flood immunity road projects. Very little literature exists on methods of evaluating the benefits of improving flood immunity through better road infrastructure. This paper attempts to address some of the numerous issues hindering the accurate evaluation of flood immunity road projects. The methodologies presented in this paper are designed to evaluate benefits that are not normally included or not fully considered in evaluations; such benefits include reduced flood related road accidents, costs of not travelling during the closure period and additional costs from unanticipated flood events. A key focus of the paper is the consideration of the evaluation of improved flood immunity from a network perspective rather than the typical approach of evaluating flood immunity projects in isolation to each other. The application of the proposed methodologies is demonstrated with a hypothetical example of a typical rural network subjected to regular flooding. The results of the analysis, conducted using the proposed methodologies, reveals that the currently applied methodologies account for less than half the likely value of benefits of a package of projects that will prevent the complete isolation of communities during serious flood events.