Detection of Shoreline Changes in Ratnagiri Block, Maharashtra, India using Remote Sensing and GIS Techniques
Detection of Shoreline Changes in Ratnagiri Block, Maharashtra, India using Remote Sensing and GIS Techniques
Date
2014
Authors
Markad, Sandip
Nakhawa, Ajay
Kamble, Sushil
Shirdhankar, Mangesh
Mohite, Ashish
Chuadhari, Ketan
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
Shoreline of Ratnagiri block, Maharashtra inhabits
different species of aquatic flora and fauna and is
characterised by different manmade structures
supporting various fishery activities. The changes
along the shoreline pertaining to erosion and
deposition during 1989 to 2009 were studied using
remote sensing and Geographic Information System
techniques. Temporal and multispectral satellite
images of the year 1989, 1999, 2004 and 2009 taken
from different satellite sensors were processed
through ERDAS Imagine 9.1 image processing
software for mapping of shoreline and associated
changes pertaining to erosion and deposition. The
study revealed an average accuracy of 97.33% for
shoreline mapping with Root Mean Square error in
the range of 0.1910 to 0.3255 pixels. The study
revealed addition of 160 ha area during 1989 to 2009
pertaining to the deposition of 233 ha and erosion
of 73 ha. Dhamankhol Bay, Kachare, Varvade,
Ganpatipule, Areware, Kalbadevi, Mandovi, Bhatye,
Ranpar and Gaonkhadi were the major areas of
deposition whereas, erosion was prominent along
Nandivade, Kachare, Ganpatipule, Mirya and
Mandovi beach areas. Navigational difficulties were
seen at Mirkarwada fishing harbour due to deposition
of sand material eroded from Mirya beach
during 1989 to 2009 whereas Dhamankhol Bay
showed accretion during 2004 to 2009 due to land
filling activity carried out for port construction.
Description
Keywords
Shoreline, remote sensing, GIS, erosion, deposition
Citation
Fishery Techn 51(4):229-233