IJG  Vol.6 No.7 , July 2015
Areal Extent of Erosion and Accretion in and around the Gahirmatha Coast, NW of Bay of Bengal by Remote Sensing and GIS Analysis of Multi-Temporal Satellite Imagery
ABSTRACT
The shoreline morphology change due to erosion and deposition is a major concern for coastal zone management. In the present study, a highly dynamic coast of Gahirmatha on Bay of Bengal  in northeast India is experiencing active erosion, which is mainly wave and tide erosion related hazard threat ending human habitation and sustainability of the coast. In our study, high resolution satellite imagery of time series provided detailed sequence of coastal morphology and their changes in all respects. Comparison study of relative shoreline positions on time series satellite data spanning three decades from 1973 to 2004 covering for the years of 1973, 1983, 1987, 1990, 1998, 2000 and 2004, provided regional changes with accelerated erosion and accretion. The result of the studies have revealed that the areas of severe erosion found along the coast are confined to the promontories of the present day mouths itself of the Baitrani at Dhamra and Brahmani at Maipura inlets. In this background, it is significant to understand the magnitude of factors that are responsible for prograding or retrograding of coast. The present study is an attempt in this direction.

Cite this paper
Veeraanarayanaa, B. , Ravikumar, K. , Ramesh, T. , Venkateswararao, M. and Sridhar, P. (2015) Areal Extent of Erosion and Accretion in and around the Gahirmatha Coast, NW of Bay of Bengal by Remote Sensing and GIS Analysis of Multi-Temporal Satellite Imagery. International Journal of Geosciences, 6, 705-719. doi: 10.4236/ijg.2015.67057.
References
[1]   Coastal Engineering Research Center (CERC) (1984) Shore Protection Manual. US Army Corps of Engineers, Washington DC, Vol. I, 597, Vol. II, 603.

[2]   Coleman, J.M. and Wright, L.D. (1971) Analysis of Major River Systems and Their Deltas: Procedures and Rationale, with Two Examples. Coastal Studies Series 28, Louisiana State University Press, Baton Rouge, 125.

[3]   Boyd, R., Dalrymple, R. and Zaitlin, B.A. (1992) Classification of Clastic Coastal Depositional Environments. Sedimentary Geology, 80, 139-150. http://dx.doi.org/10.1016/0037-0738(92)90037-R

[4]   Rao, A.D., Sujata Dash, S., Babu, S.V. and Jain, I. (2007) Numerical Modelling of Cyclone’s Impact on the Ocean—A Case Study of the Orissa Susper Cyclone. Journal of Coastal Research, 23, 1245-1250. http://dx.doi.org/10.2112/05-0517.1

[5]   Veeranaryana, B., Sridhar, P.N., Sirish Chandra, T., Dhananjaya Rao, E.N., and Satyanarayana Reddy, K. (2009) Hydrodynamic Processes and Heavy Mineral Distribution along Ekakula Beach, Gahirmatha Coast, NE Bay of Bengal. Journal of the Indian Association of Sedimentologists, 28, 85-94.

[6]   Dalrymple, R.W. (1992) Tidal Depositional Systems. In: Walker, R.G. and James, N.P., Eds., Facies Models: Response to Sea Level Change, Geological Association of Canada, Newfoundland, 195-218.

[7]   Veeranaryana, B., Sridhar, P.N., Raman, I.V., Venkateswara Rao, M., Reddy, K.S.N. and Leach, R. (2009) Mapping Seasonal Suspended Sediments Dynamics and Tidal Propagation in the Coastal Waters of the Bay of Bengal Using Oceansat-I, Ocean Color Monitor data. Journal of the Indian Association of Sedimentologists, 28, 101-106.

[8]   Sridhar, P.N., Ramana, I.V., Ali, M.M. and Veeranaryana, B. (2008) Understanding the Suspended Sediment Dynamics in the Coastal Waters of Bay of Bengal Using High Resolution Ocean Colour Data. Current Science, 94, 1499-1503.

[9]   Hema Malini, B. and Nageswara Rao, K. (2004) Coastal Erosion and Habit Loss along the Godavari Delta Front-A Fallout of Dam Construction. Current Science, 87, 1232-1236.

[10]   Trenhaile, A.S. (1997) Coastal Dynamics and Landforms. Clarendon Press, Oxford, 366-372.

[11]   IPCC Report (2001) Intergovernmental Panel on Climate Change. Washed off the Map 25 November 2000, Fred Pearce, Magazine Issue 2266.

[12]   Veeranaryana, B., Sridhar, P.N., Koteswara Rao, K., Satyanarayana, G. and Rao, E.N.D. (2011) Effect of the Bathymetric Changes on Hydrodynamic Processes and Morphology at the Inlets of Gahirmatha Coast, NE Bay of Bengal. International Journal of Earth Sciences and Engineering, 4, 56-70.

[13]   Manimurali, R. and Vethmon, P. (2013) Morphodynamic Evolution of Ekakula Spit of Odisha Coast, India Using Satellite Data. Indian Journal of Marine Sciences, 43, 1131-1136.

[14]   Oertel, G.F. (1975) Ebb-Tidal Deltas of Georgia Estuaries. Geology and Engineering, Academic Press, New York, 267-276. http://dx.doi.org/10.1016/b978-0-12-197502-9.50021-6

[15]   Tarang Khangaonkar., Felix Kristanovich., Mizan Rashid and Bankim Mallick. (1998) Tidal Circulation and Sediment Transport Modeling for Port Dhamre Chandbali Expansion Project. Technical Papers, Port Dhamra Documents.

 
 
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