Geomorphological changes in sagar island - A remote sensing study
Geomorphological changes in sagar island - A remote sensing study
Date
2001
Authors
Kumar, P.
Meenakumari, B.
Bandyopadhyay, J.K.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)
Abstract
Sagar Island, located in Sundarbans deltoid complex (West Bengal), was
subjected to a study on geomorphological, land use, land cover and coastal
vegetation changes, using IRS IC LISS III satellite data pertaining to 1996,
1998 and 1999 . The study has shown that considerable changes has taken
place in the geomorphology of Sagar Island . The landmass of the island has
eroded by 17 km' and accreted by 0 .48 km'- from 1996 to 1999 . The erosion
rate was 6 .82 km' per year during 1996-98, which reduced to 3 .26 km'- per
year to 1998-99 . This may be due to construction of brick walls at erosion
zones and increment in area of coastal vegetation . The area of coastal
vegetation was 7 .4 km- in 1996 and 8 .5 km' in 1999 The health of coastal
vegetation as indicated by Normalized Difference Vegetation Index (NDVI)
was also found to he better in 1999 (0 .4-0 .56) when compared to that in 1996
(0 .2-0 .4) . The agricultural lands reduced by 16 knm'-during the same period
due to increased human settlement.
Description
Keywords
Geomorphological changes, land cover, land use, shore line changes, geoinformatics, remote sensing, Sagar Island
Citation
Proceedings of the National seminar on Riverine and Reservoir Fishes during 23-24 May 2001 Cochin,India Ed.by Boopendranath, M.R. et.al 43-47