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Threshold Effects of Hazard Mitigation in Coastal Human–environmental Systems : Volume 1, Issue 1 (21/10/2013)

By Lazarus, E. D.

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Book Id: WPLBN0004007818
Format Type: PDF Article :
File Size: Pages 28
Reproduction Date: 2015

Title: Threshold Effects of Hazard Mitigation in Coastal Human–environmental Systems : Volume 1, Issue 1 (21/10/2013)  
Author: Lazarus, E. D.
Volume: Vol. 1, Issue 1
Language: English
Subject: Science, Earth, Surface
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Lazarus, E. D. (2013). Threshold Effects of Hazard Mitigation in Coastal Human–environmental Systems : Volume 1, Issue 1 (21/10/2013). Retrieved from

Description: Environmental Dynamics Laboratory, Earth Surface Processes Research Group, School of Earth & Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK. Despite improved scientific insight into physical and social dynamics related to natural disasters, the financial cost of extreme events continues to rise. This paradox is particularly evident along developed coastlines, where future hazards are projected to intensify with consequences of climate change, and where the presence of valuable infrastructure exacerbates risk. By design, coastal hazard mitigation buffers human activities against the variability of natural phenomena such as storms. But hazard mitigation also sets up feedbacks between human and natural dynamics. This paper explores developed coastlines as exemplary coupled human–environmental systems in which hazard mitigation is the key coupling mechanism. Results from a simplified numerical model of an agent-managed seawall illustrate the nonlinear effects that economic and physical thresholds can impart into coupled-system dynamics. The scale of mitigation action affects the time frame over which human activities and natural hazards interact. By accelerating environmental changes observable in some settings over human time scales of years to decades, climate change may temporarily strengthen the coupling between human and environmental dynamics. However, climate change could ultimately result in weaker coupling at those human time scales as mitigation actions increasingly engage global-scale systems.

Threshold effects of hazard mitigation in coastal human–environmental systems

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