Current Science

G. Sreenivasulu ¹, N. Jayaraju ¹, B. C. Sundara Raja Reddy ², T. Lakshmi Prasad ³, B. Lakshmanna ¹, K. Nagalakshmi ³

Affiliations
1 Department of Geology, Yogi Vemana University, Kadapa 516 003, IN
2 Department of Geology, Sri Venkateswara University, Tirupati 517 502, IN
3 Department of Earth Sciences, Yogi Vemana University, Kadapa 516 003, IN

Abstract

Coastal zones are dynamic interfaces of land and water of high ecological diversity and critical economic importance. The boundaries, shape and size of this coast change constantly under the influence of both natural and anthropogenic factors. The study area, Tupilipalem is one of the proposal sites for constructing a major port, to be named Dugarajapatnam Port, along the east coast of Andhra Pradesh, India. We have used multitemporal satellite images of IRS P6 LISS-III and Landsat 8 OLI/TIRS data from 2011 to 2015 to delineate changes in Tupilipalem coast. The subsequent short-term lagoon mouth closure and the long-term coastal erosion and accretion rates have been calculated for the periods between 2011 and 2015. Low river inflow, wind, tides, the movement of the waves and littoral currents play a key role in the closure of the lagoon mouth and also for the dynamic activities of erosion and accretion. Moreover, the impact on socio-economy and ecology of the study area during the lagoon mouth closure period has been studied.

Keywords

Coastal Zone, East Coast of India, Morphodynamics, Remote Sensing and GIS, Sediment Dynamics.

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