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A holistic model for coastal flooding using system diagrams and the Source–Pathway–Receptor (SPR) concept

A holistic model for coastal flooding using system diagrams and the Source–Pathway–Receptor (SPR) concept
A holistic model for coastal flooding using system diagrams and the Source–Pathway–Receptor (SPR) concept
Coastal flooding is a problem of increasing relevance in low-lying coastal regions worldwide. In addition to the anticipated increase in likelihood and magnitude of coastal floods due to climate change, there is rapid growth in coastal assets and infrastructure. Sustainable and integrated coastal flood management over large areas and varying coastline types cannot be simply treated as local combinations of flood defences and floodplains. Rather, a system level analysis of floodplains is required to structure the problem as a first step before applying quantitative models. In this paper such a model is developed using system diagrams and the Source–Pathway–Receptor (SPR) concept, to structure our understanding of large and complex coastal flood systems. A graphical systems model is proposed for the assessment of coastal flood systems with regard to individual elements and their topological relationships. Two examples are discussed – a unidirectional model for a large-scale flood system, and a multi-directional model for a smaller-scale system, both based on the Western Scheldt estuary. The models help to develop a comprehensive understanding of system elements and their relationships and provide a holistic overview of the coastal flood system. The approach shows that a system level analysis of floodplains is more effective than simple topographic maps when conveying complex information. The models are shown to be useful as an a-priori approach to making assumptions about flood mechanisms explicit and informing inputs to numerical models.
1684-9981
1431-1439
Narayan, S.
cfa550cc-d989-4240-b821-2c9ce7d037c3
Hanson, S.
dc079588-5eb2-4177-8df5-01fa493d8c16
Nicholls, R.J.
4ce1e355-cc5d-4702-8124-820932c57076
Clarke, D.
9746f367-1df2-4e0e-8d71-5ecfc9ddd000
Willems, P.
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Ntegeka, V.
0cc35277-9b36-4269-a508-3128c8b429b0
Monbaliu, J.
12be3ac0-8802-425f-b6ab-bf72d2d171dc
Narayan, S.
cfa550cc-d989-4240-b821-2c9ce7d037c3
Hanson, S.
dc079588-5eb2-4177-8df5-01fa493d8c16
Nicholls, R.J.
4ce1e355-cc5d-4702-8124-820932c57076
Clarke, D.
9746f367-1df2-4e0e-8d71-5ecfc9ddd000
Willems, P.
21eff733-c8fb-444a-a1b3-991393be3ba8
Ntegeka, V.
0cc35277-9b36-4269-a508-3128c8b429b0
Monbaliu, J.
12be3ac0-8802-425f-b6ab-bf72d2d171dc

Narayan, S., Hanson, S., Nicholls, R.J., Clarke, D., Willems, P., Ntegeka, V. and Monbaliu, J. (2012) A holistic model for coastal flooding using system diagrams and the Source–Pathway–Receptor (SPR) concept. [in special issue: Sea Hazards] Natural Hazards and Earth System Sciences, 12 (5), 1431-1439. (doi:10.5194/nhess-12-1431-2012).

Record type: Article

Abstract

Coastal flooding is a problem of increasing relevance in low-lying coastal regions worldwide. In addition to the anticipated increase in likelihood and magnitude of coastal floods due to climate change, there is rapid growth in coastal assets and infrastructure. Sustainable and integrated coastal flood management over large areas and varying coastline types cannot be simply treated as local combinations of flood defences and floodplains. Rather, a system level analysis of floodplains is required to structure the problem as a first step before applying quantitative models. In this paper such a model is developed using system diagrams and the Source–Pathway–Receptor (SPR) concept, to structure our understanding of large and complex coastal flood systems. A graphical systems model is proposed for the assessment of coastal flood systems with regard to individual elements and their topological relationships. Two examples are discussed – a unidirectional model for a large-scale flood system, and a multi-directional model for a smaller-scale system, both based on the Western Scheldt estuary. The models help to develop a comprehensive understanding of system elements and their relationships and provide a holistic overview of the coastal flood system. The approach shows that a system level analysis of floodplains is more effective than simple topographic maps when conveying complex information. The models are shown to be useful as an a-priori approach to making assumptions about flood mechanisms explicit and informing inputs to numerical models.

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More information

Published date: 14 May 2012
Organisations: Civil Maritime & Env. Eng & Sci Unit

Identifiers

Local EPrints ID: 337822
URI: http://eprints.soton.ac.uk/id/eprint/337822
ISSN: 1684-9981
PURE UUID: ab77582b-0712-44b9-8e42-1985e7954134
ORCID for R.J. Nicholls: ORCID iD orcid.org/0000-0002-9715-1109
ORCID for D. Clarke: ORCID iD orcid.org/0000-0002-5433-5258

Catalogue record

Date deposited: 04 May 2012 09:01
Last modified: 03 Dec 2019 02:08

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