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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Nguyen Hoang Khanh Linh, Le Ngoc Phuong Quy, Truong Do Minh Phuong and Nguyen Trac Ba An
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DOI:10.17265/2161-6256/2017.10.007S
Affiliation(s)
Faculty of Land Resources and Agricultural Environment, University of Agriculture and Forestry, Hue University, 102 Phung Hung Street, Hue 530000, Vietnam
ABSTRACT
Adapting and restricting salinity intrusion in
Vietnam
is being concerned by more researchers as well as the local authorities. This
study aimed
to use remote
sensing and geographic
information system (GIS) technology for
mapping paddy areas and salinity intrusion in spring crop 2015 at Phu Vang district,
thereby helping precondition for assessing and monitoring changes in salinity
intrusion to serve for salinization management in study area. Based on
acquisition imagery, land use map and normalized difference vegetation index
(NDVI)
were
extracted to interpolate the salinity of area by combining the laboratory analysis of collected soil samples from the field.
The
result showed
that there were
1,067.107
ha
of
salinity land area accounting for 10.04% of the
rice land in Phu Vang district, where the moderate salinity level was
180.67 ha and low salinity level was 866.431 ha. The
salinity rice land was mainly distributed in
Vinh Ha commune, Phu An commune and Phu Dien commune. The salinity in this area ranged from 0.4 mS/cm to
1.41 mS/cm and the moderate salinity was
approximately 0.9 mS/cm. Besides, this research also
showed
that the salinity (electrical conductivity) and the development of vegetation
(NDVI) were
closely
related
with
each other up to 61.4%.
KEYWORDS
GIS, remote sensing, normalized difference vegetation index, salinity intrusion, paddy land.
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