Assessment of Fractional Vegetation Cover Changes in some Urban and Sub-urban Areas of Hanoi Using Multi-spectral and Multi-temporal LANDSAT Images

Abstract

The objective of the study is to assess changes of FVC in some urban and sub-urban
areas of Hanoi city 2007 to 2015 based on a two endmember spectral mixture analysis (SMA) model
using multi-spectral and multi-temporal LANDSAT TM and OLI images. FVC was estimated for the
years of 2007 and 2015 by means of two endmember SMA based on NDVI, the assessment of FVC
changes was finally carried out. The study results show that: FVC was decreased with the total area of
699.8 km2, accounting for 75.5% of total area, decreased by 87.5 km2 per year in Soc Son’s south,
Dong Anh’s east, Gia Lam’s east and Thanh Tri’s west; some areas had medium and weak decrease
rate such as Cau Giay, North and South -Tu Liem and Soc Son’s west; total area of almost unchange
in FVC was 184.5 km2, accounting for 19.9% , occurring mainly in Ba Dinh, Dong Da, Hoan Kiem;
only 44.9 km2 was increased, accounting for 4.9% of total area, only 5.6 km2 per year, mainly
concentrated in the district of Hoang Mai, noth-eastern Soc Son, Dong Anh’s south.
Keywords

LANDSAT images; fractional vegetation cover change, Ha Noi city

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