Title :
Assessment of soil moisture using Landsat ETM+ temperature/vegetation index in semiarid environment
Author :
Yongnian Zeng ; Feng, Zhaodong ; Xiang, Nanping
Author_Institution :
Sch. of Info-Phys. & Geomatics Eng., Central South Univ., Changsha
Abstract :
The surface moisture is one of the most important parameters in modeling water-plant coupled land surface processes and land-air coupled climatic systems. The use of remotely sensed data is potentially of great interest in such a context. Several methods have been proposed to estimate soil moisture conditions, but the limitations of these methods are obvious. In this study, we developed a method to detect soil moisture condition using surface temperature (Ts) and vegetation index (NDVI) derived from Landsat ETM+ data. We then applied this method to the semiarid area and mapped out the spatial distribution of soil moisture. We further compared the soil moisture distribution with the spatial distribution of desertification and found that desertification in semiarid area exerts a great effect on soil moisture conditions
Keywords :
hydrological techniques; hydrology; land surface temperature; moisture; soil; terrain mapping; vegetation mapping; Landsat ETM+; NDVI; desertification; land-air coupled climatic systems; remotely sensed data; semiarid environment; soil moisture assessment; soil moisture mapping; surface moisture; surface temperature; temperature vegetation index; water-plant coupled land surface process; Couplings; Land surface; Land surface temperature; Moisture measurement; Remote sensing; Satellites; Soil measurements; Soil moisture; Temperature sensors; Vegetation mapping;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-8742-2
DOI :
10.1109/IGARSS.2004.1370089