Using graphs to find economically optimal safety targets for multiple lines of flood defences

Abstract. Flood defences can be designed as multiple lines of defence. This paper presents an approach for finding an optimal configuration for flood defence systems, based on an economic cost-benefit analysis with an arbitrary number of interdependent lines of defence. The proposed approach is based on a graph algorithm and is, thanks to some beneficial properties of the application, able to traverse large problems. A number of case studies were carried out to compare the optimal paths found by the proposed approach with the results of competing methods, and were found to generate (near) identical results. The work presented here makes cost-benefit analyses of complex flood defence systems with interdependent multiple lines of defence both easier and applicable to a broad range of flood defence systems with multiple lines of defence.

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Economically optimal safety targets for interdependent flood defences in a graph-based approach with an efficient evaluation of expected annual damage estimates

Natural Hazards and Earth System Science ◽

10.5194/nhess-17-1893-2017 ◽

2017 ◽

Vol 17 (11) ◽

pp. 1893-1906 ◽

Cited By ~ 1

Author(s):

Egidius Johanna Cassianus Dupuits ◽

Ferdinand Lennaert Machiel Diermanse ◽

Matthijs Kok

Keyword(s):

Flood Risk ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Economic Cost ◽

Graph Algorithm ◽

Expected Annual Damage ◽

Computationally Expensive ◽

Cost Calculations ◽

Set Up ◽

Flood Defence

Abstract. Flood defence systems can be seen as multiple interdependent flood defences. This paper advances an approach for finding an optimal configuration for flood defence systems based on an economic cost–benefit analysis with an arbitrary number of interdependent flood defences. The proposed approach is based on a graph algorithm and is, thanks to some beneficial properties of the application, able to represent large graphs with strongly reduced memory requirements. Furthermore, computational efficiency is achieved by delaying cost calculations until they are actually needed by the graph algorithm. This significantly reduces the required number of computationally expensive flood risk calculations. In this paper, we conduct a number of case studies to compare the optimal paths found by the proposed approach with the results of competing methods that generate identical results. The proposed approach is set up in a generic way and implements the shortest-path approach for optimising cost–benefit analyses of interdependent flood defences with computationally expensive flood risk calculations.

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Evaluating the Economic Impacts of PET Bottle Collection Systems: Cost-Benefit Analysis Based on Case Studies

Studies in Regional Science ◽

10.2457/srs.47.119 ◽

2017 ◽

Vol 47 (2) ◽

pp. 119-136

Author(s):

Riko KURIOKA

Keyword(s):

Case Studies ◽

Cost Benefit Analysis ◽

Economic Impacts ◽

Cost Benefit ◽

Benefit Analysis

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The Practical Issues and Policy Implications of Regulatory Cost-Benefit Analysis Through Case Studies

Korean Policy Studies Review ◽

10.33900/kaps.2020.29.2.3 ◽

2020 ◽

Vol 29 (2) ◽

pp. 59-89

Author(s):

Saungah Sau ◽

Insun Lim ◽

Sohyun Woo ◽

Moonsun Kang ◽

Ssangeun Jo ◽

...

Keyword(s):

Case Studies ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Policy Implications ◽

Benefit Analysis ◽

Regulatory Cost

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Some Case Studies in the Application of Cost-Effectiveness and Cost-Benefit Analysis

Choices for Health Care ◽

10.1007/978-1-349-16315-1_7 ◽

1980 ◽

pp. 92-104

Author(s):

Gavin H. Mooney ◽

Elizabeth M. Russell ◽

Roy D. Weir

Keyword(s):

Cost Effectiveness ◽

Case Studies ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Benefit Analysis

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Cost-Benefit Analysis of Financial Regulation: Case Studies and Implications

SSRN Electronic Journal ◽

10.2139/ssrn.2375396 ◽

2014 ◽

Cited By ~ 3

Author(s):

John C. Coates, IV

Keyword(s):

Case Studies ◽

Financial Regulation ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Benefit Analysis

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Enhanced Time of Use Electricity Pricing for Industrial Customers in Malaysia

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v6.i1.pp155-159 ◽

2017 ◽

Vol 6 (1) ◽

pp. 155 ◽

Cited By ~ 4

Author(s):

Nur Azrina Mohd Azman ◽

Md Pauzi Abdullah ◽

Mohammad Yusri hasan ◽

Dalila Mat Said ◽

Faridah Hussin

Keyword(s):

Case Studies ◽

Cost Benefit Analysis ◽

Electricity Consumption ◽

Cost Benefit ◽

Time Frame ◽

Electricity Pricing ◽

Benefit Analysis ◽

Consumption Profile ◽

Advanced Version ◽

Daily Time

<p>New Time of Use (ToU) tariff scheme known as Enhanced ToU (EToU) has been introduced on 1st January 2016 for industrial customers in Malaysia. EToU scheme is the advanced version of current ToU where the daily time frame is divided into six period blocks, as compared to only two in the existing ToU. Mid-peak tariff is introduced on top of peak-hour and off-peak tariff. The new scheme is designed to reduce Malaysia’s peak hour electricity demand. On customer side, they could be benefited from the low off-peak tariff by simply shifting their consumption. However, it depends on their consumption profile and their flexibility in shifting their consumption. Since EToU scheme is voluntary, each customer needs to perform cost-benefit analysis before deciding to switch into the scheme. This paper analyzes this problem by considering EToU tariff scheme for industry and customer’s electricity consumption profile. Case studies using different practical data from different industries are presented and discussed in this paper.</p>

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Economic cost benefit analysis of climate change adaptation for infrastructure

The APPEA Journal ◽

10.1071/aj10067 ◽

2011 ◽

Vol 51 (2) ◽

pp. 687

Author(s):

Michael Nolan

Keyword(s):

Climate Change ◽

Water Supply ◽

Climate Adaptation ◽

Cost Benefit Analysis ◽

Cost Benefit ◽

Climate Change Impacts ◽

Economic Cost ◽

Economic Modelling ◽

Benefit Analysis ◽

Lessons Learnt

This paper explores the lessons learnt from the Optimising Adaptation Investment projects for the Department of Climate Change and Energy Efficiency–it includes coastal settlements, water supply and rail infrastructure case studies. These projects are the first of their kind in Australia and are considered internationally as a leading example of economic cost benefit analysis. They have been used effectively to inform decision making on specific adaptation responses to climate change risks to existing and new infrastructure. The lessons learnt will be explored for offshore platforms, ports, rail, road, drainage, tailings dams, mine facilities, water, and power supply, which includes the following elements: What decision makers require to make informed decisions under the uncertainty of climate change impacts. Reducing the uncertainty through economic modelling and cost benefit analysis. Optimising the right timing and scale of various adaptation options. Benefiting from oil and gas infrastructure adaptation opportunities. To further support the elements above, the applied process for integrating climate adaptation into infrastructure planning, design and operation will be illustrated by AECOM project experiences. AECOM has completed more than 60 significant climate change risk and adaptation projects for mines, ports, water supply and treatment, energy generation, transmission and distribution, rail, road, and coastal settlements in Australia, including the report: Climate Change Impacts to Infrastructure in Australia for the Garnaut Climate Change Review.

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