1266-1271<span style="font-size:11.0pt;font-family:
" times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;letter-spacing:-.1pt;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">Shoreline change study was carried out for 25 km long
stretch of Chennai coast. Landsat TM (1990), Landsat ETM+ (2000), CARTOSAT-1 (2006),
Resourcesat-1 (2008) and Resourcesat-2 (2012, 2013) satellite images were used
as input dataset. Field survey was also
carried out using Arc-Pad GPS instrument for 2011. Three methods i.e. End Point Rate, Linear
regression Rate and Weighted Linear Regression were employed to calculate
shoreline change rate for <span style="font-size:11.0pt;
font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">1990-2013<span style="font-size:11.0pt;
mso-bidi-font-size:12.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-gb;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-GB">. While, EPR method is used to
calculate the short-term analysis for <span style="font-size:
11.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">1990-1998 and 1999-2006. Study
area was divided into four distinct zones. Totally 412 transects were generated
with 50 m spacing and the length of each transects was 200 m. From the long term analysis,
the high erosion was noticed on the northern side of the Thiruvottiyur region
with a rate of more than 5 m/yr. Royapuram fishing harbour is noticed with an
erosion rate of 4m/yr during the period of (1990β2012). 2 to 4 m/yr accretion
was seen all along the marina beach. Whereas, south of marina beach, the places
like Foreshore estate, Elliot beach and Thiruvanmiyur regions shows low erosion
rate. From the analysis it clearly shows that the northern portion of the
Chennai port is eroding and the southern portion of the port is accreting.
Combined use of satellite imagery and statistical methods proves to be a
reliable method for shoreline change analysis. Of all the statistical methods, WLR
statistical method is found to be more reliable as it takes uncertainties and
quality of datasets into account to calculate the rates of shoreline change. </span