ASSESSING THE IMPACT OF CYCLONE SIDRAND AILA ON THE  BANGLADESH SUNDARBANS AND ITS RECOVERY USING  REMOTELY SENSED IMAGERY

Ananda Saha; Kazi Saiful  Islam

doi:10.53808/KUS.2019.16.1and2.1810-E

Authors

Ananda Saha Urban and Rural Planning Discipline, Khulna University, Khulna9208, Bangladesh
Kazi Saiful Islam Urban and Rural Planning Discipline, Khulna University, Khulna9208, Bangladesh

DOI:

https://doi.org/10.53808/KUS.2019.16.1and2.1810-E

Keywords:

Vegetation density, Sundarbans, Landsat, Forest Canopy Density (FCD).

Abstract

The Sundarbans - largest tract of mangrove forest in the world - acts as a shield against natural disasters. SIDR and AILA are the two recent cyclones that severely disrupted the vegetation of the Sundarbans in the past decade. This study is to identify the impact of these cyclones on different vegetation density coverage of the Bangladesh Sundarbans and their recovery status using remotely sensed imagery. Landsat (TM) satellite imageries (2006 to 2017) are used for analyzing the vegetation structure of the Sundarbans. Forest Canopy Density (FCD) map that combines three biophysical indices, namely Advanced Vegetation Index (AVI), Bare Soil Index (BI), and Canopy Shadow Index (SI) is used to generate vegetation density map. The FCD map divulges that very highdensity vegetation coverage has increased from 33.32% to 35.73% between 2006 and 2017. Highdensity coverage increased from 35% to 42.52% between these years. Evidently, the Bangladesh Sundarbans has a high recovery rate and it has already recovered itself from the destructions caused by SIDR and AILA.

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