ON THE EFFECTIVENESS OF MANGROVES IN ATTENUATING CYCLONE - INDUCED WAVES

Proceedings of the International Conference on Coastal Engineering

Roshanka Ranasinghe¹  Siddharth Narayan²  Tomohiro Suzuki³  Henk Jan Verhagen³  Marcel J.F. Stive³  W.N.J. Ursem³ 

[1] UNESCO - IHE;University of Southampton;Delft University of Technology

关键词: Mangroves;    Vegetation Factor;    Cyclone;    Wave Attenuation;    Kanika Sands;   

DOI  :  10.9753/icce.v32.waves.50

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A study of the effectiveness of mangroves in attenuating cyclone- induced waves was done using the SWAN 40.81 numerical model. Hydraulic parameters during extreme events and local mangrove vegetation parameters were estimated for the Kanika Sands mangrove island near the upcoming Dhamra Port in Orissa, India. Simplified generic analyses were first conducted to obtain insights into the characteristics and behaviour of the model and the system. These were used to select relevant scenarios for simulations of actual conditions at the case-study site. The mangroves were found to be effective in reducing wave heights at the port behind the island though the effectiveness is limited by its geometry and distance from the port. The presence of vegetation has a marked effect though the effect of a variation in vegetation factor is limited. An optimum cross-shore width range for maximum protection was quantified.

【 授权许可】

Unknown