Teun Terpstra

Perception and communication of flood risks: a systematic review of empirical research

Flood hazards are the most common and destructive of all natural disasters. For decades, experts have been examining how flood losses can be mitigated. Just as in other risk domains, the study of risk perception and risk communication has gained increasing interest in flood risk management. Because of this research growth, a review of the state of the art in this domain is believed necessary. The review comprises 57 empirically based peer-reviewed articles on flood risk perception and communication from the Web of Science and Scopus databases. The characteristics of these articles are listed in a comprehensive table, presenting research design, research variables, and key findings. From this review, it follows that the majority of studies are of exploratory nature and have not applied any of the theoretical frameworks that are available in social science research. Consequently, a methodological standardization in measuring and analyzing peoples flood risk perceptions and their adaptive behaviors is hardly present. This heterogeneity leads to difficulties in comparing results among studies. It is also shown that theoretical and empirical studies on flood risk communication are nearly nonexistent. The article concludes with a summary on methodological issues in the fields of flood-risk perception and flood-risk communication and proposes an agenda for future research.

Citizens' Perceptions of Flood Hazard Adjustments: An Application of the Protective Action Decision Model.

Although research indicates that adoption of flood preparations among Europeans is low, only a few studies have attempted to explain citizens’ preparedness behavior. This article applies the Protective Action Decision Model (PADM) to explain flood preparedness intentions in the Netherlands. Survey data (N = 1,115) showed that hazard-related attributes (e.g., perceived efficacy in protecting persons) were positively correlated, but failed to show that resource-related attributes (e.g., perceived costs) were negatively correlated with preparedness intentions. Although respondents rated the hazard-related attributes as more important than the resource-related attributes, moderated regression failed to detect practically meaningful interaction effects. Risk perception was also positively correlated with preparedness intentions but explained less variance than did the hazard-related attributes. Among the demographic characteristics, only female gender was consistently correlated with higher risk perception and the hazard-related attributes. Finally, risk area was correlated with perceived flood likelihood and consequences as well as the hazard-related attributes. Implications are discussed.

More Than Fear Induction: Toward an Understanding of People's Motivation to Be Well‐Prepared for Emergencies in Flood‐Prone Areas

This article examines the extent and manner to which evaluations of flood-related precautions are affected by an individuals motivation and perception of context. It argues that the relationship between risk perception and flood risk preparedness can be fruitfully specified in terms of vulnerability and efficacy if these concepts are put into the perspective of prevention-focused motivation. This relationship was empirically examined in a risk communication experiment in a delta area of the Netherlands (n = 1,887). Prevention-focused motivation was induced by contextualized risk information. The results showed that prevention-focused individuals were more sensitive to the relevance of potential precautions for satisfying their needs in the context they found themselves in. The needs included, but were not limited to, fear reduction. Due to the heterogeneity of the residents, the evaluations reflected individual differences in the intensity and the selectivity of precautionary processes. Four types of persons could be distinguished according to their evaluation of precautionary measures: a high-scoring minority, two more selective types, and a low-scoring minority. For policymakers and risk communicators it is vital to consider the nature of prevention motivation and the context in which it is likely to be high.

Citizens’ adaptive or avoiding behavioral response to an emergency message on their mobile phone

Abstract Since November 2012, Dutch civil defense organizations employ NL-Alert, a cellular broadcast-based warning system to inform the public. Individuals receive a message on their mobile phone about the actual threat, as well as some advice how to deal with the situation at hand. This study reports on the behavioral effects of NL-Alert (n = 643). The current risk communication literature suggested underlying mechanisms as perceived threat, efficacy beliefs, social norms, information sufficiency, and perceived message quality. Results indicate that adaptive behavior and behavioral avoidance can be predicted by subsets of these determinants. Affective and social predictors appear to be more important in this context that socio-cognitive predictors. Implications for the use of cellular broadcast systems like NL-Alert as a warning tool in emergency situations are discussed.

Public perception of Risk

Understanding temperature extremes in a DRM context involves getting to know how often temperature extremes occur, the conditions under which they occur and establishing associated direct and indirect societal impacts. Knowledge about temperature extremes can inform the development of strategies for managing the risk associated with this type of natural event. That temperature extremes do result in disastrous consequences, in terms of lives lost, is manifest via the observed impacts of a range of extreme temperature events over the last few decades (Table 3.3). Noteworthy is that all top 10 disasters are related to extreme high as opposed to low temperatures.