Title :
Estimating of soil salinity by passive microwave observations at C band
Author :
Bobrov, Pavel P.
Author_Institution :
Omsk State Pedagogical Univ., Russia
Abstract :
Experimental results of 6.25 GHz radiothermal radiation at sites of salted and non-salted soils (under identical meteorological conditions) are presented. It is shown that the parameters of surface roughness, soil moisture profile and evaporation after intensive short-term irrigation depend on of soil surface layer salinity. This results in a distinction in the emissivity of the salted and non-salted sites for the processes of drying and freezing/thawing. The value of initial brightness contrast and speed of its change depend on the difference in salinity of the test sites
Keywords :
evaporation; hydrological techniques; moisture; radiometry; remote sensing; soil; 6.25 GHz; C band; brightness contrast; drying; emissivity; evaporation; freezing; nonsalted soils; passive microwave observations; radiothermal radiation; salted soils; short-term irrigation; soil moisture profile; soil salinity; soil surface layer salinity; surface roughness; thawing; Brightness temperature; Conductivity; Frequency; Hydrology; Irrigation; Radiometers; Rough surfaces; Soil moisture; Surface roughness; Testing;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.774547
