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Geospatial assessment of coral and mangrove environs of the Andaman Islands

Mahendra, RS and Mohanty, PC and Bisoyi, H and Srinivasa, KT (2014) Geospatial assessment of coral and mangrove environs of the Andaman Islands. International Journal of Earth Sciences and Engineering, 7 (1). pp. 275-279.

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Abstract

An archipelago island system of Andaman is consisting of several hundreds of islands. The coastal environs of these islands are rich in bio-diversity. Most of the islands rimed with fringing corals and healthy mangroves observed near the creeks/streams in the coastal zones. The Sumatra Earthquake occurred on December 26, 2004 recorded a 9.3 Mw not only generated devastating tsunami, but also created lot of tectonic disturbances in the Andaman region. As result of this, northwestern parts of the land got uplifted above a meter from the earlier position. This resulted in the lot of spatial disturbances in the coastal environment. The shallow depth corals were exposed and degraded permanently. Moreover, the mangroves in the up streams were also degraded. A case study from the Interview Island in the northern Andaman was selected to assess the changes. The study was carried out using the Landsat Enhanced Thematic Mapper (ETM) and Indian Remote Sensing (IRS) Linear Imaging Self Scanning Sensor (LISS)-III data were used to infer the spatial changes in the coral and mangrove environments. The assessment was carried out using the Remote Sensing and GIS techniques. The results of the study reveal that the total coral reef area of 17. 82 km2 degraded. The mangrove also showed the same tendency of degradation of total 4.48 km2 area. The techniques and the data were used in the study were given useful insight. The results help in understanding the spatial extent and the distribution of the damage caused due to this natural calamity on the coral and mangrove environment.

Item Type: Article
Uncontrolled Keywords: Coastal zones; Geographic information systems; Reefs; Remote sensing, Coastal environments; Enhanced thematic mappers; Fringing reefs; Mortality; Remote sensing and GIS; Scanning sensors; Sumatra earthquakes; Tectonic disturbances, Earthquakes, coastal zone; coral reef; earthquake mechanism; environmental impact; GIS; Landsat thematic mapper; mangrove; remote sensing; satellite imagery; spatial analysis; Sumatra earthquake 2004, Andamans; Andamans and Nicobars; India
Subjects: Oceanography > oceanography
Depositing User: INCOIS Library
Date Deposited: 10 Nov 2014 06:57
Last Modified: 10 Nov 2014 06:57
URI: http://moeseprints.incois.gov.in/id/eprint/850

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