Volume 3, Issue 2 (2001)
JAST 2001, 3(2): 21-31 |
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Alavi Panah S K, Goossens R. Relationship Between the Landsat TM, MSS DATA
and Soil Salinity. JAST 2001; 3 (2) :21-31
URL: http://jast.modares.ac.ir/article-23-2374-en.html
URL: http://jast.modares.ac.ir/article-23-2374-en.html
1- Iran Desert Research Center, University of Tehran, Islamic Republic of Iran.
2- Department of Regional Geography and Landscape Study, University of Gent, Belgium.
2- Department of Regional Geography and Landscape Study, University of Gent, Belgium.
Abstract: (5726 Views)
To use remote sensing data effectively, one must understand the spectral characteristics
of the particular features under investigations. To study the relationship between soil salinity
and soil reflectance, four MultiSpectral Scanners (MSS) and seven Thematic Mappers
(TM bands) over the Ardakan playa located on the Central Iranian Desert margins
were selected. In this study soil map, soil salinity observations, an interpolated soil salinity
map and 13 images in all, including 7 TM, 4 MSS and 2 Normalised Difference Vegetation
Indices (NDVI) images were used. After smoothing the imagery using a 3× 3 kernel, and
delineating the bare soil from vegetated areas, the correlation coefficients between soil salinity
(Electrical Conductivity) and related Digital Number (DN) values from TM and
MSS bands on different soil types, such as gypsiferons and saline soils, were calculated.
The results obtained demonstrate the trend of the correlation coefficients between soil salinity
and the related DN values of MSS and TM bands. Based on the results obtained, we
may conclude that the presence of gypsum in soil plays a significant role in lowering the
correlation coefficients between soil salinity and surface reflectance -further studies are
required to draw more general conclusions. From the results obtained we may also conclude
that the behavior of band 6 of TM on gypsiferous soil is completely different from
that on saline soil and, therefore, we may generally conclude that Landsat TM imagery
with six reflective bands, on the one hand, and the TM thermal band as complementary
information to the TM reflective bands, on the other hand, contained some useful information
that may play an important role in soil salinity studies and also the detection of
gypsiferous soils in desert areas.
Received: 2010/05/16 | Accepted: 2010/05/16 | Published: 2010/05/16
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