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The soil dielectric constant, the basis of the microwave remote sensing for soil moisture and salinity estimations, is one of the main parameters of microwave remote sensing research. It is very important to select the high precision soil water and salt dielectric model to improve the precision of soil moisture and salinity inversion. This paper presents a comparison and analysis of permittivity models...
The polarimetric synthetic aperture radar (PolSAR) has been demonstrated a huge application potential in soil moisture (SM) inversion under vegetation. However, this promising approach has seldom been reported applied in an oasis of the northwest arid regions of China. This paper presents an analysis of component decomposition based on Radarsat-2 images. The main purpose of the analysis is to provide...
Development and validation of hydrological cycle elements derived from remote sensing observations are of utmost importance for the study of hydrology at different scales, especially at watershed scale. This paper presents the progress we have made in developing and validating watershed scale hydrological cycle products, mainly including precipitation, snow cover area (SCA), soil moisture (SM), evapotranspiration...
The dynamic monitoring and mapping of soil salinization is a practical significance work at present. In this paper, the middle reaches of Heihe River, China, was taken as a study case to discuss the effectiveness of extracting saline land information applying decision tree approach, based on Landsat TM data acquired on Sep.23, 2007. Through visual interpretation and statistical analysis of spectral...
MODIS data and in situ data were used to establish a real thermal inertia model to retrieve soil thermal inertia of Heihe River Basin (HRB) and a soil thermal inertia-soil moisture model to calculate the soil moisture of the basin. Meanwhile, the data of two observation stations in the basin was used to validate the result of retrieval. The correlation coefficients of those between retrieved and observed...
The 250m 16-day composite EOS/MODIS products (MOD13Q1) from 2000 to 2006 were chosen for monitoring annual and seasonal variation of Gahai Lake area. And the effects of meteorological factors on Gahai Lake were also discussed. The method of single band with threshold value was applied to lake extraction. The results showed that in 2000~2002 Gahai Lake often dried up, but the lake water appearance...
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