Title :
Study on the influence of drought to crop growth based on SAR remote sensing
Author :
Cai, Aimin ; Shao, Yun ; Zhang, Fengli ; Gong, Huaze
Author_Institution :
Inst. of Remote Sensing Applic., Chinese Acad. of Sci., Beijing, China
Abstract :
This paper aims to get the relationship between drought and crop growth. By investigating synthetic aperture radar (SAR) backscattering coefficients, HH- and VV- polarization were found different due to influence from canopy, because of strong attenuation of the VV- polarization by the vertically oriented wheat stems. In small incidence angle, HH is sensitive to soil moisture, while VV is more sensitive to canopy. Two classes of crop with low and high soil moisture are investigated by ¿water-cloud¿ model with vegetation descriptor vegetation water mass (VWM). Parameters of the model show that in drought the crop growth will be worse. This research presents that it is possible to study the influence of drought to wheat growth with small incidence angle of C-band SAR.
Keywords :
backscatter; crops; hydrological techniques; hydrology; radar polarimetry; rain; remote sensing by radar; soil; synthetic aperture radar; C-band SAR; HH-polarization; SAR remote sensing; VV-polarization; crop growth; drought; soil moisture; synthetic aperture radar backscattering coefficient; vegetation descriptor; vegetation water mass; vertically oriented wheat stems; water-cloud model; Backscatter; Biomass; Crops; Geometry; Optical sensors; Polarization; Remote sensing; Soil moisture; Vegetation mapping; Weather forecasting; Drought; SAR; crop growth; water-cloud model;
Conference_Titel :
Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009
Conference_Location :
Cape Town
Print_ISBN :
978-1-4244-3394-0
Electronic_ISBN :
978-1-4244-3395-7
DOI :
10.1109/IGARSS.2009.5417393
