By: G.Arun, M.Tech (6yr intg), Geo Technology and Geo Informatics, Centre for Remote Sensing, Bharathidasan University.

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Presentation transcript:

By: G.Arun, M.Tech (6yr intg), Geo Technology and Geo Informatics, Centre for Remote Sensing, Bharathidasan University.

Introduction: Tropical cyclones have greater impact in causing severe damages among the natural disasters. It causes storm surge associated with floods along the coastline. S torm surge is a high flood of water caused by wind and low pressure, most commonly associated with Tropical cyclone.

The water level rise due to the combination of storm surge and the astronomical tide.

Impacts of Cyclone: The main effects of tropical cyclones include heavy rain, strong wind, large storm surges at landfall, and tornadoes. The destruction from a tropical cyclone depends mainly on its intensity, its size, and its location. The storm surge, or the increase in sea level due to the cyclone, is typically the worst effect from land falling tropical cyclones, historically resulting in 90% of tropical cyclone deaths.

Phailin Cyclone formation: The cyclonic circulation formed in Tenasserim coast on 6th October It lay over north Andaman Sea as a well marked low pressure area on 7th October and concentrated into a depression on 8 th october. Moving west-northwestwards, it intensified into a deep depression on 9th morning and further into cyclonic storm (CS), ‘PHAILIN’ in the same day evening.

Moving northwestwards, it further intensified into a severe cyclonic storm (SCS) in the morning and into a VSCS in the forenoon of 10th Oct. Over east central Bay of Bengal. The VSCS, PHAILIN crossed Odisha & adjoining north Andhra Pradesh coast near Gopalpur (Odisha) around 2230 hrs IST of 12th October 2013 with a sustained maximum surface wind speed of kmph gusting to 220 kmph.

Gopalpur

Aim Assessment of wave height and prediction of disaster caused through storm surge inundation mapping.

Objectives:  Assessing the wave height that caused by cyclone Phailin using CEM (Coastal Engineering Manual).  Identification of the vulnerable zones of storm surge inundation.  Prediction of damage caused due to inundation by matching with NDVI of the area.

Study Area: Coastal stretch of 200Km in Orissa and parts of Andra Pradesh with Gopalpur south west of Chilika lake taken for the study. Area Chosen faces the maximum intensity of the disaster caused due Phailin.

Data and Software Used: Landsat ETM Aster DEM Google street Map GEBCO Bathymetry Map Software: ArcGIS ENVI 4.7

Collateral data Terrain slope Wave height model Vulnerable zone Terrain height Satellite data Aster Dem Landsat ETM WIND PARAMETERS WIND PARAMETERS NDVI INUNDATION

Assessment of Wave Height CEM (Coastal Engineering Manual) US Army Equation of Prediction of non dimensional wave height: H= g= acceleration due to gravity(9.8) X= Fetch length (48.5 Km). =Friction Velocity.

Friction Velocity: U = wind speed (59.17 m/s i.e. 213Km/h) C D = Drag coefficient. Drag Coefficient: Wave Height = 9.43 m.

Landfall

RESULT AND CONCLUSION: As the Tropical Cyclonic Storms causes high intensity of disasters in the coastal landforms as well as high seas, integral approach studies are needed to be carried out to attain sustainability over the coast and to improve Commerce over seas. Better platform are to be created to resist Cyclonic storms rather than evacuation of people from their original habituate.

THANK YOU…