Polarimetric scattering model for estimation of above ground biomass of multilayer vegetation using ALOS-PALSAR quad-pol data |
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| Institution: | 1. Institute of Applied Physics, National Research Council of Italy (IFAC – CNR), Via Madonna del Piano 10, 50019 Florence, Italy;2. Department of Agricultural, Food and Forestry Systems, Università degli Studi di Firenze, Via San Bonaventura 13, 50145 Florence, Italy;3. Italian Academy of Forest Sciences, P.zza Edison 11, 50133 Florence, Italy;4. Institute of Biometeorology, National Research Council of Italy (IBIMET – CNR), via Madonna del Piano 10, 50019 Florence, Italy;5. LaMMA Consortium, Via Madonna del Piano 10, 50019 Florence, Italy |
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| Abstract: | Forests are important biomes covering a major part of the vegetation on the Earth, and as such account for seventy percent of the carbon present in living beings. The value of a forest’s above ground biomass (AGB) is considered as an important parameter for the estimation of global carbon content. In the present study, the quad-pol ALOS-PALSAR data was used for the estimation of AGB for the Dudhwa National Park, India. For this purpose, polarimetric decomposition components and an Extended Water Cloud Model (EWCM) were used. The PolSAR data orientation angle shifts were compensated for before the polarimetric decomposition. The scattering components obtained from the polarimetric decomposition were used in the Water Cloud Model (WCM). The WCM was extended for higher order interactions like double bounce scattering. The parameters of the EWCM were retrieved using the field measurements and the decomposition components. Finally, the relationship between the estimated AGB and measured AGB was assessed. The coefficient of determination (R2) and root mean square error (RMSE) were 0.4341 and 119 t/ha respectively. |
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| Keywords: | Above ground biomass PALSAR Orientation angle Polarimetric decomposition Extended Water Cloud Model |
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