Vulnerability assessment of coastal plant communities from flooding caused by unusual storms: A case study of Kabakum beach, Varna (Northeastern Bulgaria) for 2018 year

The present paper proposed a rapid method for vulnerability assessment of coastal plant communities from flooding caused by unusual storms over the Bulgarian Black Sea Coast. The model was tested and applied on Kabakum beach, Varna (Northeastern Bulgaria) for 2018 year. In order to create a dynamic GIS model, data from experimental results and detailed GIS mapping on the Kabakum beach (Varna) were incorporated. As a result of a simulated flooding experiment, Critical Decomposition Time (CDT) was obtained. Linking flood duration with CDT and altitudinal spreading of plants determines that Аrtemisia vulgaris L., Eryngium maritimum L. and Crambe maritima L. are vulnerable to storms. The plant communities in Kabakum beach are not threatened by complete destruction even during a storm with a return period of 100 years. Habitat recovery is likely within a season and does not require human intervention.