Water and Environment Journal. Print ISSN 1747-6585 Cyclone hazards in the Arabian sea–A numerical modelling case study of Cyclone Nilofar Mohammad Akhtaruzzaman Sarker Royal HaskoningDHV, Rightwell House, Bretton, Peterborough, PE3 8DW, UK Keywords Abstract numerical modelling; natural hazards; cyclone; extreme waves; storm surge; port develop- Cyclones cause significant loss of life and damage to properties, ecosystems and ment; Arabian Sea. marine facilities. To address such issues, Royal HaskoningDHV (RHDHV) has devel- oped regional tidal hydrodynamic and wave models covering the Northern Arabian Correspondence Sea. A total of 29 major cyclones were identified in the Arabian Sea since 1945. Dr Mohammad Akhtaruzzaman Sarker, However, as less information is available on Cyclone Nilofar (2014), this paper has Principal Engineer; research fields: numerical modelling of coastal processes including concentrated on this event to illustrate the use of numerical modelling to simulate waves, tides, sediment transport, cyclones, waves and surge generated by cyclones. Sample results from the modelling study tsunamis, sea ice and water quality (dredge are presented in this paper. The methodology described in this paper for modelling plume, outfall discharge and oil spills). cyclone waves and surges in the Arabian Sea could be applied to simulate such nat- Email:
[email protected] ural hazards at other sites around the world. doi:10.1111/wej.12214 Introduction especially vulnerable to tropical cyclones with around Tropical cyclones are associated with high-pressure gra- 718,000 deaths from them in the past 50 years (Haque et al., dients and consequent strong winds and storm surges. Very 2012). The deadliest tropical cyclone was the 1970 Bhola strong winds may damage installations, dwellings, transpor- Cyclone, which had a death toll of anywhere from 300,000 to tation and communication systems, trees etc.