Preprints
https://doi.org/10.5194/nhess-2020-155
https://doi.org/10.5194/nhess-2020-155

  23 Sep 2020

23 Sep 2020

Review status: a revised version of this preprint was accepted for the journal NHESS.

Risk management framework of environmental hazards and extremes in Mediterranean ecosystems

Panagiotis T. Nastos1, Nicolas R. Dalezios2, Ioannis N. Faraslis3, Kostas Mitrakopoulos2, Anna Blanta2, Marios Spiliotopoulos2, Stavros Sakellariou2, Pantelis Sidiropoulos2, and Ana María Tarquis4 Panagiotis T. Nastos et al.
  • 1Laboratory of Climatology and Atmospheric Environment, National and Kappodistrian University of Athens, Athens, Greece
  • 2Department of Civil Engineering, University of Thessaly, Volos, Greece
  • 3Department of Environment, University of Thessaly, Volos, Greece
  • 4CEIGRAM-Department of Agricultural Engineering, Technical University of Madrid, Madrid, Spain

Abstract. Risk assessment constitutes the first part within the risk management framework and involves evaluating the importance of a risk, either quantitatively, or qualitatively. Risk assessment consists of three steps, namely risk identification, risk estimation and risk evaluation. Nevertheless, the risk management framework also includes a fourth step, i.e. the need for a feedback of all the risk assessment undertakings. However, there is a lack of such feedback, which constitutes a serious deficiency in the reduction of environmental hazards at the present time. Risk identification of local or regional hazards involves hazard quantification, event monitoring including early warning systems and statistical inference. Risk identification also involves the development of a database, where historical hazard information and their effects is included. Similarly, risk estimation involves magnitude/frequency relationships and hazard economic costs. Furthermore, risk evaluation consists of the social consequences of the derived risk and involves cost-benefit analysis and community policy. The objective of this review paper is twofold: On one hand, to address meteorological hazards and extremes within the risk management framework. Analyses results and case studies over Mediterranean ecosystems with emphasis on the wider area of Greece, in the eastern Mediterranean, are presented for each of the three steps of risk assessment for several environmental hazards. The results indicate that the risk management framework constitutes an integrated approach for environmental planning and decision making. On the other hand, it shed light to advances and current trends in the considered meteorological and environmental hazards and extreme events, such as tornadoes, waterspouts, hailstorms, heat waves, droughts, floods, heavy convective precipitation, landslides and wildfires, using recorded datasets, model simulations and innovative methodologies.

Panagiotis T. Nastos et al.

 
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Panagiotis T. Nastos et al.

Panagiotis T. Nastos et al.

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Short summary
Risk assessment consists of three steps: identification, estimation and evaluation. Nevertheless, the risk management framework also includes a fourth step, the need for a feedback of all the risk assessment undertakings. However, there is a lack of such feedback, which constitutes a serious deficiency in the reduction of environmental hazards at the present time. The objective of this review paper consists of addressing meteorological hazards and extremes within the risk management framework.
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