Mapping Mangrove Forest Change in Nijhum Dwip Island

Mangroves have been planting in the coastal belt of Bangladesh to protect the inhabitants of the coastal areas from cyclones and storm surges. Nijhum Dwip is located at the southern part of Hatiya Island. Most part of the island has been planted with the mangroves in the 1970s and 1980s; while parts of the mangroves have been deforested during the past few decades. The objectives of this research were to delineate and quantify the changes in the extent of mangroves in the island. The Landsat data of 1989, 2001, 2010 and 2018 have been utilized in the study. Three major land covers, namely forest, water and other land have been interpreted and delineated by using on-screen digitizing. The quantity of mangrove forest loss in the island is estimated as 1,024 ha, while 395 ha were afforested during 1989-2018. In the decadal change analysis, it was revealed that net forest cover change was higher in 2000s compared to other two decades and it was -425 ha. The result of the study is helpful to understand the extent and pattern of forest conversion in the island and to halt further forest loss and conserve the remaining forest. J. Environ. Sci. & Natural Resources, 11(1-2): 217-225 2018

[1]  E. Shimizu.  Satellite Remote Sensing , 2019, Dictionary of Geotourism.

[2]  A. Van Rompaey,et al.  Spatiotemporal Analysis of the Controlling Factors of Forest Cover Change in the Romanian Carpathian Mountains , 2015 .

[3]  M. Rahman,et al.  Monitoring Mangrove Plantation along the Coastal Belts of Bangladesh (1989-2010) , 2015 .

[4]  Bruce W. Pengra,et al.  Distribution and dynamics of mangrove forests of South Asia. , 2015, Journal of environmental management.

[5]  Steffen Gebhardt,et al.  Remote Sensing of Mangrove Ecosystems: A Review , 2011, Remote. Sens..

[6]  Benjamin W. Heumann.  Satellite remote sensing of mangrove forests: Recent advances and future opportunities , 2011 .

[7]  Ashbindu Singh,et al.  Status and distribution of mangrove forests of the world using earth observation satellite data , 2011 .

[8]  P. Mayaux,et al.  An object-based method for mapping and change analysis in mangrove ecosystems , 2008 .

[9]  Chandra Giri,et al.  Mangrove forest distributions and dynamics (1975–2005) of the tsunami‐affected region of Asia † , 2008 .

[10]  Bruce W. Pengra,et al.  Monitoring mangrove forest dynamics of the Sundarbans in Bangladesh and India using multi-temporal satellite data from 1973 to 2000 , 2007 .

[11]  C. Vaiphasa.  Remote sensing techniques for mangrove mapping , 2006 .

[12]  Ying Zhang,et al.  Knowledge-Based Approaches to Accurate Mapping of Mangroves from Satellite Data , 2004 .

[13]  F. Blasco,et al.  Mangroves along the coastal stretch of the Bay of Bengal: Present status , 2002 .

[14]  P. Saenger,et al.  Land from the sea: The mangrove afforestation program of Bangladesh , 1993 .