Summary of Abstract Submission

Abstract Submission No. IO50-04-0047PresentationPoster


K. Nagalakshmii*1, Dr. N. Jayaraju1, Dr.T. Palahniui Prasad1, G.Sreenivasulu**1, B.Lakshmanna**1

1 Yogi Vemana University,Kadapa,A.P., India


Pulicat Lake is major wetland in India. It is the 2nd largest brackish water lagoon in India after Chilka Lake in Orissa. This Pulicat Lake extending between 13020I -13040I N Lats and 80014I 80015I E Longs and formed out of backwater of the Bay of Bengal. The Pulicat Lake occurs besides the Bay of Bengal so that the sea mouth is very important. Here the sea water flows into the Lake during the high tide and records during low tide. Based on Satellite Data three types of mouths were located along the east coast of Nellore district, among that one is located at Northern side of the Pulicat Lake at Tupilipalem, Nellore district, Andhra Pradesh and second one is located at the southern side of the Pulicat Lake at Thiruvalluru district, Tamilnadu. The width of the mouth was dynamically fluctuating year by year. So this situation might pose threat to the Lake Biodiversity. Satellite imagery were collected for three years (2009,2011&2012).The Remote Sensing data for October 2009 recorded the width of 548 m, for November 2011, 540 m and March 2012 ,508 m(Table-1).The sea mouth width increased from 548m to 558m from 2009 to 2011 showing an increase of 10 m. Later from November 2011 to March 2012 it began to shrink and decreased from 558 m to 508 m (50m) due to the sand bar formation. The sand bar was formed due to wind direction towards the southern side depositing sand. The mangroves are also plays a key role to deposit silt at the river mouth. The thousands of mangroves stiltlike roots catch silt (mud deposits) at the mouths of streams, slow down the current and help the silt to settle. It is high time to protect the existing width of the sea mouth to keep the Lake alive. Keywords: Remote Sensing imagery, Sea Mouth, Pulicat Lake, Biodiversity, Sandbar