The Application of Grassland Aboveground Biomass Estimating Model in Karst Mountainous Area

Abstract:

In typical Karst mountain area, the complex and broken ground surface leads to serious mixed pixel phenomenon. In this paper, with Tuchang Town as the research area, we utilized linear spectral mixture analysis to estimate biomass of grassland from Landsat ETM+ image. The analysis indicated that the grassland component which extracted based on the linear mixed model has obvious lineal correlation with the field measured data. The grassland aboveground biomass estimation model can be expressed by the equation: Y=2451.158X-280.461, (R²=0.8012). The result of precision validation shows that the overall accuracy is above 85%. The grassland aboveground biomass estimation model which based on linear spectral mixture analysis is feasible.

• Periodical: Applied Mechanics and Materials (Volumes 488-489)
• Pages: 741-745
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.488-489.741
• Online since: January 2014
• Authors: Quan Chen*, Zhong Fa Zhou
• Keywords: Grassland Aboveground Biomass, Karst Mountainous Area, Remote Sensing Model, Spectral Mixture Analysis

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