Remote Sensing Applications and Decision Support

Aboveground biomass estimation of mangrove species using ALOS-2 PALSAR imagery in Hai Phong City, Vietnam

[+] Author Affiliations
Tien Dat Pham

University of Tsukuba, Graduate School of Systems and Information Engineering, Tsukuba city, Ibaraki, Japan

Vietnam National University of Agriculture, Center for Agricultural Research and Ecological Studies, Trau Quy, Gia Lam, Hanoi, Vietnam

Kunihiko Yoshino

University of Tsukuba, Faculty of Engineering, Information and Systems, Tsukuba city, Ibaraki, Japan

J. Appl. Remote Sens. 11(2), 026010 (Apr 28, 2017). doi:10.1117/1.JRS.11.026010
History: Received August 11, 2016; Accepted April 11, 2017
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Abstract.  This study examined the potential of using the HH and HV backscatter from the Advanced Land Observing Satellite 2 (ALOS-2) with enhanced phased array L-band synthetic aperture radar (PALSAR) in high sensitive mode to estimate the above-ground biomass (AGB) of the two mangrove species of Hai Phong city, Vietnam. A positive correlation was observed between the mean backscattering coefficients of the dominant mangrove species at dual polarizations HH and HV and various biophysical parameters. In contrast, low correlations were observed between those coefficients and the tree densities for the two mangrove species. The AGB of the mangrove species were estimated at between 2.8 and 161.5  Mgha1 with an average of about 39  Mgha1 for Sonneratia caseolaris and between 27.6 and 209.2  Mgha1 with an average of 100  Mgha1 for Kandelia obovata. The main indicators used for the selection of the best potential models in estimating the AGB of different species were R2 and the root-mean-square error (RMSE). The results showed a satisfactory correlation between model estimation and field-based measurements with R2=0.51, RMSE=35.5  Mgha1 for S. caseolaris and R2=0.64, RMSE=41.3  Mgha1 for K. obovata. This research has illustrated the potential use of ALOS-2 PALSAR data in estimating the AGB of mangrove species in the tropics.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Tien Dat Pham and Kunihiko Yoshino
"Aboveground biomass estimation of mangrove species using ALOS-2 PALSAR imagery in Hai Phong City, Vietnam", J. Appl. Remote Sens. 11(2), 026010 (Apr 28, 2017). ; http://dx.doi.org/10.1117/1.JRS.11.026010


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