Summary of Abstract Submission

Abstract Submission No. IO50-10-0033PresentationOral

ASSESSMENT OF EXTREME WATER LEVELS AND COASTAL RISK ALONG THE PARTS OF ANDHRA PRADESH, EAST COAST OF INDIA

R S MAHENDRA*1, P C MOHANTY1, H SHIVAKAKUMAR1, SATEJ PANDITHRAO1, T SRINIVASA KUMAR1, SHAILESH NAYAK2

1 INCOIS, INDIA
2 MOES, INDIA

ABSTRACT :

The current study area is Machilipatnam coastal zone of Andhra Pradesh, east coast of India. The study area is low lying flat coastal zone experience threat during cyclone and other oceanogenic disasters. As the Bay Bengal region generates frequent cyclones and resulting impacts on the east coast of India led to lot of damage to life and property. This was evident by the disasters in the recent past: super cyclone during 1977 and severe cyclonic surge during 1990 which were devastated coastal zone of this are and taking several ten thousands of life and huge property loss. This is clearly emphasizing the area is seriously under threat and highly exposed to natural environment. The study aims at assessing the extreme water levels, their recurrence probability, calculating the extent of their impact using high resolution topography with composite coastal erosion. This work is being carried out using high resolution DEMs (ALTM and Cartosat-1), historical hourly tide data and erosion trend. All these parameters were synthesized using a holistic approach and composite hazard line has been calculated in GIS environment. The composite hazard map depicts the large coastal stretches falling under the composite hazard zone near Machilipatnam. The similar method was used and maps generated for the Phailin and Hudhud hit areas and these maps were compared with field observed inundation. The validation exercises were reveal better correlation along the open coasts. The coastal risk has been calculated at building level using the composite hazard line and elevation. Outcomes of this study yield in better